|
I still find it strange to call it Constant Surface Speed when the speed is not constant.
I saw an ad for a $500,00 lathe that programmable variable?spindle speed was a big part of their promotion, I cannot remember?the lathe name.
Ralph
I found this video on you tube, my wife took possibly 5 years ago and sorry not Hollywood but hopefully shows the invaluable use
of my Constant Surface Speed attachment.?
I fitted to a real Bull Lathe with gear reduction, and advised it can be also compatible for the Sieg type mini lathes.
Just need to be careful with the Sieg that the spindle does not start turning on its own.
This possibility is detailed in the instructions in the Digital hobbyist files created by C Levinski
The lathe since has gone through several more digital age changes, including the RELS, compound slide removed etc.
Hope of interest.
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
Ralph, The RPMs are not constant, but the surface speed is... or, more accurately, in this system it is approximately constant between two limits. This is an extremely important concept to understand. The ratings of cutting tool technologies, etc. are all based on the surface speed, I.E., how quickly the material being machined moves under the cutter. In a lathe, this depends on how far from the centerline the tool is cutting, and is most visible when facing. Assume a simple round 4 inches in diameter being faced at a rotation rate of 100 RPM. When you start cutting at 2 inches from the centerline, the surface speed is: 100 r/m X 4 inches X pi = 1257 inches/min (approx) When you are 1 inch from the centerline, the surface speed is: 100 r/m X 2 inches X pi = 628 inches/min (approx) And when you are 1/4 inch from the centerline: 100 r/m x 0.5 inches X pi = 157 inches/min (approx) Please note that the distance from the centerline for a round part is the radius. The circumference of the part is the diameter X pi, so we multiply the radius X 2 in the calculation. The purpose of a constant surface speed system is to increase the RPMs to keep the surface speed constant during cutting. BTW, have you ever noticed when facing that when you are almost to the centerline the the chips come off so slowly that you can watch each one form? That's because the surface speed decreases rapidly as you approach the centerline, and is? actually zero at the centerline. This is a problem for CSS systems, because the RPMs should approach infinity as the tool approaches the centerline in order to maintain constant surface speed, and very few spindle bearings are rated for infinity RPM. -- Regards, Charlie New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
|
Thanks Charlie, DUH, I knew that. But I appreciate the refresher.
Where are you in NJ? I am out on Long Island on the East End.
Ralph
Ralph,
The RPMs are not constant, but the surface speed is... or, more accurately, in this system it is approximately constant between two limits.
This is an extremely important concept to understand. The ratings of cutting tool technologies, etc. are all based on the surface speed, I.E., how quickly the material being machined moves under the cutter. In a lathe, this depends on how far from the centerline the tool is cutting, and is most visible when facing.
Assume a simple round 4 inches in diameter being faced at a rotation rate of 100 RPM. When you start cutting at 2 inches from the centerline, the surface speed is:
100 r/m X 4 inches X pi = 1257 inches/min (approx)
When you are 1 inch from the centerline, the surface speed is:
100 r/m X 2 inches X pi = 628 inches/min (approx)
And when you are 1/4 inch from the centerline:
100 r/m x 0.5 inches X pi = 157 inches/min (approx)
Please note that the distance from the centerline for a round part is the radius. The circumference of the part is the diameter X pi, so we multiply the radius X 2 in the calculation.
The purpose of a constant surface speed system is to increase the RPMs to keep the surface speed constant during cutting.
BTW, have you ever noticed when facing that when you are almost to the centerline the the chips come off so slowly that you can watch each one form? That's because the surface speed decreases rapidly as you approach the centerline, and is? actually zero at the centerline. This is a problem for CSS systems, because the RPMs should approach infinity as the tool approaches the centerline in order to maintain constant surface speed, and very few spindle bearings are rated for infinity RPM.
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
Ralph, I don't know what you meant by the following, then: "I still find it strange to call it Constant Surface Speed when the speed is not constant." I live in Middlesex County... -- Regards, Charlie New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
|
I had forgotten the discussions?we have had about CSS.
Gee you are only 3 hours away.
Ralph
On Sat, Apr 10, 2021 at 10:11 AM CLevinski < clevinski@...> wrote: Ralph,
I don't know what you meant by the following, then:
"I still find it strange to call it Constant Surface Speed when the speed is not constant."
I live in Middlesex County...
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
When I'm parting or facing I (manually) crank up the RPMs as I approach the center of the work.? Not for the "science" of cutting as such, just so I don't have to slow the approach down a lot as I approach the center.? If you're looking at what's going on it is easy to see what's going on.? A CSS scheme could certainly help if you're committed to an automation-based approach.? Just beware that singularity when r = 0!!? Infinity is not something to mess with :)
|
I have tried to follow this thread, and the thing I see is a
question, HOW FOR HUNDREDS OF YEARS< HAVE MACHINISTS MANAGED TO
PART ITEMS IN A LATHE????? Answer SKILL!!
On 4/11/21 10:50 PM, Mark Kimball
wrote:
toggle quoted message
Show quoted text
When I'm parting or facing I (manually) crank up the RPMs as I
approach the center of the work.? Not for the "science" of cutting
as such, just so I don't have to slow the approach down a lot as I
approach the center.? If you're looking at what's going on it is
easy to see what's going on.? A CSS scheme could certainly help if
you're committed to an automation-based approach.? Just beware
that singularity when r = 0!!? Infinity is not something to mess
with :)
|
On Mon, Apr 12, 2021 at 12:50 AM, Mark Kimball wrote:
Just beware that singularity when r = 0!!? Infinity is not something to mess with :)
LOL!? -- Regards, Charlie New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
|
On Mon, Apr 12, 2021 at 08:50 AM, Robert Francis wrote:
HOW FOR HUNDREDS OF YEARS< HAVE MACHINISTS MANAGED TO PART ITEMS IN A LATHE????? Answer SKILL!!
Robert, Absolutely true! When at a Renaissance Fair in Germany some years ago, I watch an artisan make wooded chess pieces on a lathe powered by a sapling. The tree was bent over and rope ran from the tree around the spindle multiple times, and was the anchored to a foot pedal. Pressing on the foot pedal would turn the spindle and the artisan would take cuts, and then withdraw his tool when the pedal was released and the spindle spun in reverse. This was certainly a skilled individual. But I doubt that woodworkers worldwide would like to surrender their electric motors and plant saplings in their shops! The CSS is just one more tool.?(Although I view CSS more as a tool for creating larger diameter faced surfaces without "vinyl record grooves" rather than for parting.) It just increases the RPM to keep surface speed constant as the tool is advanced in the X-axis. It does not require that the lathe be otherwise automated. Like all such tools, it does NOT replace skill! Good point! ? -- Regards, Charlie New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
|
I was going to ask about using CSS while parting? So far I can part Delrin (plastic) and aluminium nicely but have never successfully parted steel. So if CSS would help I'll move it up on the list.
Ralph
On Mon, Apr 12, 2021 at 08:50 AM, Robert Francis wrote:
HOW FOR HUNDREDS OF YEARS< HAVE MACHINISTS MANAGED TO PART ITEMS IN A LATHE????? Answer SKILL!!
Robert,
Absolutely true!
When at a Renaissance Fair in Germany some years ago, I watch an artisan make wooded chess pieces on a lathe powered by a sapling. The tree was bent over and rope ran from the tree around the spindle multiple times, and was the anchored to a foot pedal. Pressing on the foot pedal would turn the spindle and the artisan would take cuts, and then withdraw his tool when the pedal was released and the spindle spun in reverse. This was certainly a skilled individual. But I doubt that woodworkers worldwide would like to surrender their electric motors and plant saplings in their shops!
The CSS is just one more tool.?(Although I view CSS more as a tool for creating larger diameter faced surfaces without "vinyl record grooves" rather than for parting.) It just increases the RPM to keep surface speed constant as the tool is advanced in the X-axis. It does not require that the lathe be otherwise automated. Like all such tools, it does NOT replace skill! Good point!
?
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
Parting off. These are a nice tool to use, 2 bites of the?cherry?carbide insert and double ended.
I use HSS parting tools thinned down for "o" ring grooves, that?s about?all nowadays.
I have used my insert parting tool for over 3 1/2 years. Expensive to initially buy, but a very reliable tool. With a good coolant flow, mainly to wash the chips out of the groove, a 2" dia steel parting off is a dream.? Even more easier since I removed my compound slide and made into a boat anchor. LOL. my tool post?is fixed directly to a riser block that bolts to the cross slide.? Thanks RELS, I have no more "compound slide" blues.?
John
I was going to ask about using CSS while parting? So far I can part Delrin (plastic) and aluminium nicely but have never successfully parted steel. So if CSS would help I'll move it up on the list.
Ralph
On Mon, Apr 12, 2021 at 08:50 AM, Robert Francis wrote:
HOW FOR HUNDREDS OF YEARS< HAVE MACHINISTS MANAGED TO PART ITEMS IN A LATHE????? Answer SKILL!!
Robert,
Absolutely true!
When at a Renaissance Fair in Germany some years ago, I watch an artisan make wooded chess pieces on a lathe powered by a sapling. The tree was bent over and rope ran from the tree around the spindle multiple times, and was the anchored to a foot pedal. Pressing on the foot pedal would turn the spindle and the artisan would take cuts, and then withdraw his tool when the pedal was released and the spindle spun in reverse. This was certainly a skilled individual. But I doubt that woodworkers worldwide would like to surrender their electric motors and plant saplings in their shops!
The CSS is just one more tool.?(Although I view CSS more as a tool for creating larger diameter faced surfaces without "vinyl record grooves" rather than for parting.) It just increases the RPM to keep surface speed constant as the tool is advanced in the X-axis. It does not require that the lathe be otherwise automated. Like all such tools, it does NOT replace skill! Good point!
?
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
--
John
|
I have smashed a couple of carbide parting tools, so I stick with HSS for the time being.
Ralph
Parting off. These are a nice tool to use, 2 bites of the?cherry?carbide insert and double ended.
I use HSS parting tools thinned down for "o" ring grooves, that?s about?all nowadays.
I have used my insert parting tool for over 3 1/2 years. Expensive to initially buy, but a very reliable tool. With a good coolant flow, mainly to wash the chips out of the groove, a 2" dia steel parting off is a dream.? Even more easier since I removed my compound slide and made into a boat anchor. LOL. my tool post?is fixed directly to a riser block that bolts to the cross slide.? Thanks RELS, I have no more "compound slide" blues.?
John
I was going to ask about using CSS while parting? So far I can part Delrin (plastic) and aluminium nicely but have never successfully parted steel. So if CSS would help I'll move it up on the list.
Ralph
On Mon, Apr 12, 2021 at 08:50 AM, Robert Francis wrote:
HOW FOR HUNDREDS OF YEARS< HAVE MACHINISTS MANAGED TO PART ITEMS IN A LATHE????? Answer SKILL!!
Robert,
Absolutely true!
When at a Renaissance Fair in Germany some years ago, I watch an artisan make wooded chess pieces on a lathe powered by a sapling. The tree was bent over and rope ran from the tree around the spindle multiple times, and was the anchored to a foot pedal. Pressing on the foot pedal would turn the spindle and the artisan would take cuts, and then withdraw his tool when the pedal was released and the spindle spun in reverse. This was certainly a skilled individual. But I doubt that woodworkers worldwide would like to surrender their electric motors and plant saplings in their shops!
The CSS is just one more tool.?(Although I view CSS more as a tool for creating larger diameter faced surfaces without "vinyl record grooves" rather than for parting.) It just increases the RPM to keep surface speed constant as the tool is advanced in the X-axis. It does not require that the lathe be otherwise automated. Like all such tools, it does NOT replace skill! Good point!
?
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
You might want to tighten up the gibbs on the compound and cross-slide, and for the saddle. Or make a monolithic block like John L uses. Rigidity is the very first thing you want, and you want as much as you can get! While still being able to crank things around, anyway. :)
If you're shattering carbide, things are moving that aren't supposed to move.
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
A human being should be able to change a diaper, plan an invasion,
butcher a hog, conn a ship, design a building, write a sonnet, balance
accounts, build a wall, set a bone, comfort the dying, take orders,
give orders, cooperate, act alone, solve equations, analyze a new
problem, pitch manure, program a computer, cook a tasty meal, fight
efficiently, die gallantly. Specialization is for insects.
LAZARUS LONG (Robert A. Heinlein)
On Monday, April 12, 2021, 10:23:46 AM CDT, Ralph Hulslander <rhulslander@...> wrote:
I have smashed a couple of carbide parting tools, so I stick with HSS for the time being.
Ralph
Parting off. These are a nice tool to use, 2 bites of the?cherry?carbide insert and double ended.
I use HSS parting tools thinned down for "o" ring grooves, that?s about?all nowadays.
I have used my insert parting tool for over 3 1/2 years. Expensive to initially buy, but a very reliable tool. With a good coolant flow, mainly to wash the chips out of the groove, a 2" dia steel parting off is a dream.? Even more easier since I removed my compound slide and made into a boat anchor. LOL. my tool post?is fixed directly to a riser block that bolts to the cross slide.? Thanks RELS, I have no more "compound slide" blues.?
John
I was going to ask about using CSS while parting? So far I can part Delrin (plastic) and aluminium nicely but have never successfully parted steel. So if CSS would help I'll move it up on the list.
Ralph
On Mon, Apr 12, 2021 at 08:50 AM, Robert Francis wrote:
HOW FOR HUNDREDS OF YEARS< HAVE MACHINISTS MANAGED TO PART ITEMS IN A LATHE????? Answer SKILL!!
Robert,
Absolutely true!
When at a Renaissance Fair in Germany some years ago, I watch an artisan make wooded chess pieces on a lathe powered by a sapling. The tree was bent over and rope ran from the tree around the spindle multiple times, and was the anchored to a foot pedal. Pressing on the foot pedal would turn the spindle and the artisan would take cuts, and then withdraw his tool when the pedal was released and the spindle spun in reverse. This was certainly a skilled individual. But I doubt that woodworkers worldwide would like to surrender their electric motors and plant saplings in their shops!
The CSS is just one more tool.?(Although I view CSS more as a tool for creating larger diameter faced surfaces without "vinyl record grooves" rather than for parting.) It just increases the RPM to keep surface speed constant as the tool is advanced in the X-axis. It does not require that the lathe be otherwise automated. Like all such tools, it does NOT replace skill! Good point!
?
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
Hi Ralph, ? I also did have many problems with parting on my ATLAS 10200 lathe, after repairing a warped cross slide guiding, replacing the plastic gibs by brass ones, it got the tool in a useful state. The tool on the picture is what I used. ? But also it’s crucial to have the parting tool exactly at center height and the angle between parting tool and the part must be between 0 -1 degree. ? In the old day the parting tool was placed upside down behind the spindle while the lathe was running reverse direction. This mainly was in use the overcome bad bearings of the main axis. (And maybe more) ? Sorry if I once in a while mess up the English language. ? Best regards, Leo ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Ralph Hulslander
Sent: maandag 12 april 2021 17:24
To: [email protected]
Subject: Re: [digitalhobbyist] Constant Surface Speed #CSS #LATHES #MODS ? I have smashed a couple of carbide parting tools, so I stick with HSS for the time being. ? These are a nice tool to use, 2 bites of the?cherry?carbide insert and double ended. I use HSS parting tools thinned down for "o" ring grooves, that?s about?all nowadays. I have used my insert parting tool for over 3 1/2 years. Expensive to initially buy, but a very reliable tool. With a good coolant flow, mainly to wash the chips out of the groove, a 2" dia steel parting off is a dream.? Even more easier since I removed my compound slide and made into a boat anchor. LOL. my tool post?is fixed directly to a riser block that bolts to the cross slide.? Thanks RELS, I have no more "compound slide" blues.? ? I was going to ask about using CSS while parting? So far I can part Delrin (plastic) and aluminium nicely but have never successfully parted steel. So if CSS would help I'll move it up on the list. ? On Mon, Apr 12, 2021 at 08:50 AM, Robert Francis wrote: HOW FOR HUNDREDS OF YEARS< HAVE MACHINISTS MANAGED TO PART ITEMS IN A LATHE????? Answer SKILL!! Robert,
Absolutely true!
When at a Renaissance Fair in Germany some years ago, I watch an artisan make wooded chess pieces on a lathe powered by a sapling. The tree was bent over and rope ran from the tree around the spindle multiple times, and was the anchored to a foot pedal. Pressing on the foot pedal would turn the spindle and the artisan would take cuts, and then withdraw his tool when the pedal was released and the spindle spun in reverse. This was certainly a skilled individual. But I doubt that woodworkers worldwide would like to surrender their electric motors and plant saplings in their shops!
The CSS is just one more tool.?(Although I view CSS more as a tool for creating larger diameter faced surfaces without "vinyl record grooves" rather than for parting.) It just increases the RPM to keep surface speed constant as the tool is advanced in the X-axis. It does not require that the lathe be otherwise automated. Like all such tools, it does NOT replace skill! Good point!
?
--
Regards,
Charlie
New Jersey, USA SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
??? ??? your doing fine Leo
??? ??? animal
On 4/12/2021 10:54 AM, Leo Kuipers
wrote:
toggle quoted message
Show quoted text
Hi
Ralph,
?
I also did have many problems with parting on
my ATLAS 10200 lathe, after repairing a warped cross slide
guiding, replacing the plastic gibs by brass ones, it got
the tool in a useful state.
The tool on the picture is what I used. ?
But also it’s crucial to have the parting tool
exactly at center height and the angle between parting tool
and the part must be between 0 -1 degree.
?
In the old day the parting tool was placed
upside down behind the spindle while the lathe was running
reverse direction. This mainly was in use the overcome bad
bearings of the main axis. (And maybe more)
?
Sorry if I once in a while mess up the English
language.
?
Best regards,
Leo
?
From: [email protected]
[mailto:[email protected]] On Behalf Of Ralph
Hulslander
Sent: maandag 12 april 2021 17:24
To: [email protected]
Subject: Re: [digitalhobbyist] Constant Surface Speed
#CSS #LATHES #MODS
?
I have smashed a couple of carbide
parting tools, so I stick with HSS for the time being.
?
These are a nice
tool to use, 2 bites of the?cherry?carbide insert
and double ended.
I use HSS
parting tools thinned down for "o" ring grooves,
that?s about?all nowadays.
I have used my
insert parting tool for over 3 1/2 years. Expensive
to initially buy, but a very reliable tool.
With a good
coolant flow, mainly to wash the chips out of the
groove, a 2" dia steel parting off is a dream.?
Even more easier
since I removed my compound slide and made into a
boat anchor. LOL. my tool post?is fixed directly
to a riser block
that bolts to the cross slide.?
Thanks RELS, I
have no more "compound slide" blues.?
?
I was going to ask about using
CSS while parting? So far I can part Delrin
(plastic) and aluminium nicely
but have never successfully
parted steel. So if CSS would help I'll move it up
on the list.
?
On Mon, Apr 12, 2021 at 08:50
AM, Robert Francis wrote:
HOW FOR HUNDREDS OF YEARS<
HAVE MACHINISTS MANAGED TO PART ITEMS IN A
LATHE????? Answer SKILL!!
Robert,
Absolutely true!
When at a Renaissance Fair in Germany some years
ago, I watch an artisan make wooded chess pieces
on a lathe powered by a sapling. The tree was bent
over and rope ran from the tree around the spindle
multiple times, and was the anchored to a foot
pedal. Pressing on the foot pedal would turn the
spindle and the artisan would take cuts, and then
withdraw his tool when the pedal was released and
the spindle spun in reverse. This was certainly a
skilled individual. But I doubt that woodworkers
worldwide would like to surrender their electric
motors and plant saplings in their shops!
The CSS is just one more tool.?(Although I view
CSS more as a tool for creating larger diameter
faced surfaces without "vinyl record grooves"
rather than for parting.) It just increases the
RPM to keep surface speed constant as the tool is
advanced in the X-axis. It does not require that
the lathe be otherwise automated. Like all such
tools, it does NOT replace skill! Good point!
?
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S
LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you
turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe,
14" Delta drill press, 40 watt laser, Consew brushless
DC motors and a non working 3D printer
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14"
Delta drill press, 40 watt laser, Consew brushless DC motors
and a non working 3D printer
|
Thanks everyone for the replies, and yes Leo you are doing great.
As I said I was able to part Delrin and aluminium, parting the aluminium looked like a YouTube video of how to part. It was perfect. But with steel I have problems but I will continue trying and if I really have to part something I do have a which is a fantastic tool.
Ralph
On Mon, Apr 12, 2021 at 1:56 PM mike allen < animal@...> wrote:
??? ??? your doing fine Leo
??? ??? animal
On 4/12/2021 10:54 AM, Leo Kuipers
wrote:
Hi
Ralph,
?
I also did have many problems with parting on
my ATLAS 10200 lathe, after repairing a warped cross slide
guiding, replacing the plastic gibs by brass ones, it got
the tool in a useful state.
The tool on the picture is what I used. ?
But also it’s crucial to have the parting tool
exactly at center height and the angle between parting tool
and the part must be between 0 -1 degree.
?
In the old day the parting tool was placed
upside down behind the spindle while the lathe was running
reverse direction. This mainly was in use the overcome bad
bearings of the main axis. (And maybe more)
?
Sorry if I once in a while mess up the English
language.
?
Best regards,
Leo
?
From: [email protected]
[mailto:[email protected]] On Behalf Of Ralph
Hulslander
Sent: maandag 12 april 2021 17:24
To: [email protected]
Subject: Re: [digitalhobbyist] Constant Surface Speed
#CSS #LATHES #MODS
?
I have smashed a couple of carbide
parting tools, so I stick with HSS for the time being.
?
These are a nice
tool to use, 2 bites of the?cherry?carbide insert
and double ended.
I use HSS
parting tools thinned down for "o" ring grooves,
that?s about?all nowadays.
I have used my
insert parting tool for over 3 1/2 years. Expensive
to initially buy, but a very reliable tool.
With a good
coolant flow, mainly to wash the chips out of the
groove, a 2" dia steel parting off is a dream.?
Even more easier
since I removed my compound slide and made into a
boat anchor. LOL. my tool post?is fixed directly
to a riser block
that bolts to the cross slide.?
Thanks RELS, I
have no more "compound slide" blues.?
?
I was going to ask about using
CSS while parting? So far I can part Delrin
(plastic) and aluminium nicely
but have never successfully
parted steel. So if CSS would help I'll move it up
on the list.
?
On Mon, Apr 12, 2021 at 08:50
AM, Robert Francis wrote:
HOW FOR HUNDREDS OF YEARS<
HAVE MACHINISTS MANAGED TO PART ITEMS IN A
LATHE????? Answer SKILL!!
Robert,
Absolutely true!
When at a Renaissance Fair in Germany some years
ago, I watch an artisan make wooded chess pieces
on a lathe powered by a sapling. The tree was bent
over and rope ran from the tree around the spindle
multiple times, and was the anchored to a foot
pedal. Pressing on the foot pedal would turn the
spindle and the artisan would take cuts, and then
withdraw his tool when the pedal was released and
the spindle spun in reverse. This was certainly a
skilled individual. But I doubt that woodworkers
worldwide would like to surrender their electric
motors and plant saplings in their shops!
The CSS is just one more tool.?(Although I view
CSS more as a tool for creating larger diameter
faced surfaces without "vinyl record grooves"
rather than for parting.) It just increases the
RPM to keep surface speed constant as the tool is
advanced in the X-axis. It does not require that
the lathe be otherwise automated. Like all such
tools, it does NOT replace skill! Good point!
?
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S
LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you
turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe,
14" Delta drill press, 40 watt laser, Consew brushless
DC motors and a non working 3D printer
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14"
Delta drill press, 40 watt laser, Consew brushless DC motors
and a non working 3D printer
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
|
I have seen many many people reference either a rear-mounted cutoff tool, or flipping the cutoff tool upside down and running the lathe in reverse; since your lathe doesn’t run in reverse (iirc), you’ll want to look into a rear-mounted one. ?IN Ted Hansen’s Minilathe book from Home Shop Machinist, he has plans and description on building a rear-mounted on for a mini-lathe that you may be able to modify to work.
But generally, as someone else mentioned, more rigidity is needed.?
Thanks everyone for the replies, and yes Leo you are doing great.
As I said I was able to part Delrin and aluminium, parting the aluminium looked like a YouTube video of how to part. It was perfect. But with steel I have problems but I will continue trying and if I really have to part something I do have a which is a fantastic tool.
Ralph On Mon, Apr 12, 2021 at 1:56 PM mike allen < animal@...> wrote:
??? ??? your doing fine Leo
??? ??? animal
On 4/12/2021 10:54 AM, Leo Kuipers
wrote:
Hi
Ralph, ? I also did have many problems with parting on
my ATLAS 10200 lathe, after repairing a warped cross slide
guiding, replacing the plastic gibs by brass ones, it got
the tool in a useful state. The tool on the picture is what I used. ? But also it’s crucial to have the parting tool
exactly at center height and the angle between parting tool
and the part must be between 0 -1 degree. ? In the old day the parting tool was placed
upside down behind the spindle while the lathe was running
reverse direction. This mainly was in use the overcome bad
bearings of the main axis. (And maybe more) ? Sorry if I once in a while mess up the English
language. ? Best regards, Leo ? From: [email protected]
[mailto:[email protected]] On Behalf Of Ralph
Hulslander
Sent: maandag 12 april 2021 17:24
To: [email protected]
Subject: Re: [digitalhobbyist] Constant Surface Speed
#CSS #LATHES #MODS ?
I have smashed a couple of carbide
parting tools, so I stick with HSS for the time being.
?
These are a nice
tool to use, 2 bites of the?cherry?carbide insert
and double ended.
I use HSS
parting tools thinned down for "o" ring grooves,
that?s about?all nowadays.
I have used my
insert parting tool for over 3 1/2 years. Expensive
to initially buy, but a very reliable tool.
With a good
coolant flow, mainly to wash the chips out of the
groove, a 2" dia steel parting off is a dream.?
Even more easier
since I removed my compound slide and made into a
boat anchor. LOL. my tool post?is fixed directly
to a riser block
that bolts to the cross slide.?
Thanks RELS, I
have no more "compound slide" blues.?
?
I was going to ask about using
CSS while parting? So far I can part Delrin
(plastic) and aluminium nicely
but have never successfully
parted steel. So if CSS would help I'll move it up
on the list.
?
On Mon, Apr 12, 2021 at 08:50
AM, Robert Francis wrote: HOW FOR HUNDREDS OF YEARS<
HAVE MACHINISTS MANAGED TO PART ITEMS IN A
LATHE????? Answer SKILL!! Robert,
Absolutely true!
When at a Renaissance Fair in Germany some years
ago, I watch an artisan make wooded chess pieces
on a lathe powered by a sapling. The tree was bent
over and rope ran from the tree around the spindle
multiple times, and was the anchored to a foot
pedal. Pressing on the foot pedal would turn the
spindle and the artisan would take cuts, and then
withdraw his tool when the pedal was released and
the spindle spun in reverse. This was certainly a
skilled individual. But I doubt that woodworkers
worldwide would like to surrender their electric
motors and plant saplings in their shops!
The CSS is just one more tool.?(Although I view
CSS more as a tool for creating larger diameter
faced surfaces without "vinyl record grooves"
rather than for parting.) It just increases the
RPM to keep surface speed constant as the tool is
advanced in the X-axis. It does not require that
the lathe be otherwise automated. Like all such
tools, it does NOT replace skill! Good point!
?
--
Regards,
Charlie
New Jersey, USA SATTINGER’S
LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you
turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe,
14" Delta drill press, 40 watt laser, Consew brushless
DC motors and a non working 3D printer
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14"
Delta drill press, 40 watt laser, Consew brushless DC motors
and a non working 3D printer
-- Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
--? Bruce Johnson
"Wherever you go, there you are." B. Banzai, PhD
|
??? ??? there's a guy , I think WInky's workshop & he made
some kind of base that he can put a support on that supports the
tool to make it much more ridged
??? ??? animal
On 4/12/2021 12:31 PM, Bruce J wrote:
toggle quoted message
Show quoted text
I have seen many many people reference either a rear-mounted
cutoff tool, or flipping the cutoff tool upside down and running
the lathe in reverse; since your lathe doesn’t run in reverse
(iirc), you’ll want to look into a rear-mounted one. ?IN Ted
Hansen’s Minilathe book from Home Shop Machinist, he has plans and
description on building a rear-mounted on for a mini-lathe that
you may be able to modify to work.
But generally, as someone else mentioned, more
rigidity is needed.?
Thanks everyone for the replies,
and yes Leo you are doing great.
As I said I was able to part Delrin and
aluminium, parting the aluminium looked like a YouTube
video of how to part.
It was perfect. But with steel I have
problems but I will continue trying and if I really
have to part something I do have a which is a fantastic tool.
Ralph
On Mon, Apr 12, 2021
at 1:56 PM mike allen < animal@...>
wrote:
??? ??? your doing fine Leo
??? ??? animal
On 4/12/2021 10:54 AM, Leo Kuipers
wrote:
Hi Ralph,
?
I also did have many
problems with parting on my ATLAS 10200
lathe, after repairing a warped cross slide
guiding, replacing the plastic gibs by brass
ones, it got the tool in a useful state.
The tool on the
picture is what I used. ?
But also it’s crucial
to have the parting tool exactly at center
height and the angle between parting tool
and the part must be between 0 -1 degree.
?
In the old day the
parting tool was placed upside down behind
the spindle while the lathe was running
reverse direction. This mainly was in use
the overcome bad bearings of the main axis.
(And maybe more)
?
Sorry if I once in a
while mess up the English language.
?
Best regards,
Leo
?
From: [email protected]
[mailto:[email protected]]
On Behalf Of Ralph
Hulslander
Sent: maandag 12 april 2021
17:24
To: [email protected]
Subject: Re:
[digitalhobbyist] Constant Surface Speed
#CSS #LATHES #MODS
?
I have smashed a couple
of carbide parting tools, so I stick with
HSS for the time being.
?
These are a nice tool to
use, 2 bites of the?cherry?carbide
insert and double ended.
I use HSS parting tools
thinned down for "o" ring grooves,
that?s about?all nowadays.
I have used my insert
parting tool for over 3 1/2 years.
Expensive to initially buy, but a
very reliable tool.
With a good coolant flow,
mainly to wash the chips out of the
groove, a 2" dia steel parting off
is a dream.?
Even more easier since I
removed my compound slide and made
into a boat anchor. LOL. my tool
post?is fixed directly
to a riser block that bolts
to the cross slide.?
Thanks RELS, I have no more
"compound slide" blues.?
?
I was going to
ask about using CSS while parting?
So far I can part Delrin (plastic)
and aluminium nicely
but have never
successfully parted steel. So if
CSS would help I'll move it up on
the list.
?
On Mon, Apr 12,
2021 at 08:50 AM, Robert Francis
wrote:
HOW FOR
HUNDREDS OF YEARS< HAVE
MACHINISTS MANAGED TO PART ITEMS
IN A LATHE????? Answer SKILL!!
Robert,
Absolutely true!
When at a Renaissance Fair in
Germany some years ago, I watch an
artisan make wooded chess pieces
on a lathe powered by a sapling.
The tree was bent over and rope
ran from the tree around the
spindle multiple times, and was
the anchored to a foot pedal.
Pressing on the foot pedal would
turn the spindle and the artisan
would take cuts, and then withdraw
his tool when the pedal was
released and the spindle spun in
reverse. This was certainly a
skilled individual. But I doubt
that woodworkers worldwide would
like to surrender their electric
motors and plant saplings in their
shops!
The CSS is just one more
tool.?(Although I view CSS more as
a tool for creating larger
diameter faced surfaces without
"vinyl record grooves" rather than
for parting.) It just increases
the RPM to keep surface speed
constant as the tool is advanced
in the X-axis. It does not require
that the lathe be otherwise
automated. Like all such tools, it
does NOT replace skill! Good
point!
?
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S
LAW: It works better if you
plug it in.
EDWARD'S LAW: It
works even better if you
turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe,
4x12 mini lathe, 14" Delta drill
press, 40 watt laser, Consew brushless
DC motors and a non working 3D printer
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12
mini lathe, 14" Delta drill press, 40 watt
laser, Consew brushless DC motors and a non
working 3D printer
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14"
Delta drill press, 40 watt laser, Consew brushless DC
motors and a non working 3D printer
--?
Bruce Johnson
"Wherever you go, there you are." B.
Banzai, PhD
|
John Lindo has done it, as well.?
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
A human being should be able to change a diaper, plan an invasion,
butcher a hog, conn a ship, design a building, write a sonnet, balance
accounts, build a wall, set a bone, comfort the dying, take orders,
give orders, cooperate, act alone, solve equations, analyze a new
problem, pitch manure, program a computer, cook a tasty meal, fight
efficiently, die gallantly. Specialization is for insects.
LAZARUS LONG (Robert A. Heinlein)
On Monday, April 12, 2021, 06:29:56 PM CDT, mike allen <animal@...> wrote:
??? ??? there's a guy , I think WInky's workshop & he made
some kind of base that he can put a support on that supports the
tool to make it much more ridged
??? ??? animal
On 4/12/2021 12:31 PM, Bruce J wrote:
I have seen many many people reference either a rear-mounted
cutoff tool, or flipping the cutoff tool upside down and running
the lathe in reverse; since your lathe doesn’t run in reverse
(iirc), you’ll want to look into a rear-mounted one. ?IN Ted
Hansen’s Minilathe book from Home Shop Machinist, he has plans and
description on building a rear-mounted on for a mini-lathe that
you may be able to modify to work.
But generally, as someone else mentioned, more
rigidity is needed.?
Thanks everyone for the replies,
and yes Leo you are doing great.
As I said I was able to part Delrin and
aluminium, parting the aluminium looked like a YouTube
video of how to part.
It was perfect. But with steel I have
problems but I will continue trying and if I really
have to part something I do have a which is a fantastic tool.
Ralph
On Mon, Apr 12, 2021
at 1:56 PM mike allen < animal@...>
wrote:
??? ??? your doing fine Leo
??? ??? animal
On 4/12/2021 10:54 AM, Leo Kuipers
wrote:
Hi Ralph,
?
I also did have many
problems with parting on my ATLAS 10200
lathe, after repairing a warped cross slide
guiding, replacing the plastic gibs by brass
ones, it got the tool in a useful state.
The tool on the
picture is what I used. ?
But also it’s crucial
to have the parting tool exactly at center
height and the angle between parting tool
and the part must be between 0 -1 degree.
?
In the old day the
parting tool was placed upside down behind
the spindle while the lathe was running
reverse direction. This mainly was in use
the overcome bad bearings of the main axis.
(And maybe more)
?
Sorry if I once in a
while mess up the English language.
?
Best regards,
Leo
?
From: [email protected]
[mailto:[email protected]]
On Behalf Of Ralph
Hulslander
Sent: maandag 12 april 2021
17:24
To: [email protected]
Subject: Re:
[digitalhobbyist] Constant Surface Speed
#CSS #LATHES #MODS
?
I have smashed a couple
of carbide parting tools, so I stick with
HSS for the time being.
?
These are a nice tool to
use, 2 bites of the?cherry?carbide
insert and double ended.
I use HSS parting tools
thinned down for "o" ring grooves,
that?s about?all nowadays.
I have used my insert
parting tool for over 3 1/2 years.
Expensive to initially buy, but a
very reliable tool.
With a good coolant flow,
mainly to wash the chips out of the
groove, a 2" dia steel parting off
is a dream.?
Even more easier since I
removed my compound slide and made
into a boat anchor. LOL. my tool
post?is fixed directly
to a riser block that bolts
to the cross slide.?
Thanks RELS, I have no more
"compound slide" blues.?
?
I was going to
ask about using CSS while parting?
So far I can part Delrin (plastic)
and aluminium nicely
but have never
successfully parted steel. So if
CSS would help I'll move it up on
the list.
?
On Mon, Apr 12,
2021 at 08:50 AM, Robert Francis
wrote:
HOW FOR
HUNDREDS OF YEARS< HAVE
MACHINISTS MANAGED TO PART ITEMS
IN A LATHE????? Answer SKILL!!
Robert,
Absolutely true!
When at a Renaissance Fair in
Germany some years ago, I watch an
artisan make wooded chess pieces
on a lathe powered by a sapling.
The tree was bent over and rope
ran from the tree around the
spindle multiple times, and was
the anchored to a foot pedal.
Pressing on the foot pedal would
turn the spindle and the artisan
would take cuts, and then withdraw
his tool when the pedal was
released and the spindle spun in
reverse. This was certainly a
skilled individual. But I doubt
that woodworkers worldwide would
like to surrender their electric
motors and plant saplings in their
shops!
The CSS is just one more
tool.?(Although I view CSS more as
a tool for creating larger
diameter faced surfaces without
"vinyl record grooves" rather than
for parting.) It just increases
the RPM to keep surface speed
constant as the tool is advanced
in the X-axis. It does not require
that the lathe be otherwise
automated. Like all such tools, it
does NOT replace skill! Good
point!
?
--
Regards,
Charlie
New Jersey, USA
SATTINGER’S
LAW: It works better if you
plug it in.
EDWARD'S LAW: It
works even better if you
turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe,
4x12 mini lathe, 14" Delta drill
press, 40 watt laser, Consew brushless
DC motors and a non working 3D printer
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12
mini lathe, 14" Delta drill press, 40 watt
laser, Consew brushless DC motors and a non
working 3D printer
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14"
Delta drill press, 40 watt laser, Consew brushless DC
motors and a non working 3D printer
--?
Bruce Johnson
"Wherever you go, there you are." B.
Banzai, PhD
|
Leo. Your replies are OK? I agree with the need for an accurate parting tool?height set up.? Understand your rear tool post position preference, splash guard side of the spindle, but if the parting tool blade is upside down. then the spindle should be running in a normal direction IE anti clockwise to cut. The saddle needs to be locked down with the?saddle?clamp else it will lift off the?bedway. This option of upside down is popular on capstan and or CNC lathes, as it allows the chips to fall off the tool and not curl up on the top rake and trap. Most CNC lathes with multi indexing tooling turrets run the tooling from the slash guard side of the spindle with tools upside down.? Unfortunately I have only a 7 x mini lathe and do not have sufficient space to secure a tool post splash guard side of the cross slide parting off 30 mm dia bar stock? I might? get away with a max dia of 20 mm, but the removal of the compound slide and the tool post basically bolted to the cross slide has gained rigidity so the normal approach of feeding in from the operator side is OK at this moment.
John Lindo
On Mon, 12 Apr 2021 at 19:54, Leo Kuipers < leo.abo@...> wrote: Hi Ralph, ? I also did have many problems with parting on my ATLAS 10200 lathe, after repairing a warped cross slide guiding, replacing the plastic gibs by brass ones, it got the tool in a useful state. The tool on the picture is what I used. ? But also it’s crucial to have the parting tool exactly at center height and the angle between parting tool and the part must be between 0 -1 degree. ? In the old day the parting tool was placed upside down behind the spindle while the lathe was running reverse direction. This mainly was in use the overcome bad bearings of the main axis. (And maybe more) ? Sorry if I once in a while mess up the English language. ? Best regards, Leo ? From: [email protected] [mailto:[email protected]] On Behalf Of Ralph Hulslander
Sent: maandag 12 april 2021 17:24
To: [email protected]
Subject: Re: [digitalhobbyist] Constant Surface Speed #CSS #LATHES #MODS ? I have smashed a couple of carbide parting tools, so I stick with HSS for the time being. ? These are a nice tool to use, 2 bites of the?cherry?carbide insert and double ended. I use HSS parting tools thinned down for "o" ring grooves, that?s about?all nowadays. I have used my insert parting tool for over 3 1/2 years. Expensive to initially buy, but a very reliable tool. With a good coolant flow, mainly to wash the chips out of the groove, a 2" dia steel parting off is a dream.? Even more easier since I removed my compound slide and made into a boat anchor. LOL. my tool post?is fixed directly to a riser block that bolts to the cross slide.? Thanks RELS, I have no more "compound slide" blues.? ? I was going to ask about using CSS while parting? So far I can part Delrin (plastic) and aluminium nicely but have never successfully parted steel. So if CSS would help I'll move it up on the list. ? On Mon, Apr 12, 2021 at 08:50 AM, Robert Francis wrote: HOW FOR HUNDREDS OF YEARS< HAVE MACHINISTS MANAGED TO PART ITEMS IN A LATHE????? Answer SKILL!! Robert,
Absolutely true!
When at a Renaissance Fair in Germany some years ago, I watch an artisan make wooded chess pieces on a lathe powered by a sapling. The tree was bent over and rope ran from the tree around the spindle multiple times, and was the anchored to a foot pedal. Pressing on the foot pedal would turn the spindle and the artisan would take cuts, and then withdraw his tool when the pedal was released and the spindle spun in reverse. This was certainly a skilled individual. But I doubt that woodworkers worldwide would like to surrender their electric motors and plant saplings in their shops!
The CSS is just one more tool.?(Although I view CSS more as a tool for creating larger diameter faced surfaces without "vinyl record grooves" rather than for parting.) It just increases the RPM to keep surface speed constant as the tool is advanced in the X-axis. It does not require that the lathe be otherwise automated. Like all such tools, it does NOT replace skill! Good point!
?
--
Regards,
Charlie
New Jersey, USA SATTINGER’S LAW: It works better if you plug it in.
EDWARD'S LAW: It works even better if you turn it on.
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
--
John
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
--
John
|
John Lindo
Bill in OKC too
