开云体育

Ken,
I do believe. I spent hours and hours, over several frustrating
days until I got mine close enough to objectively leave alone. The
only thing I hate more than pry bar adjustments is hammer
adjustments :-)

Roy
--- In 7x12minilathe@..., "Capt Ken Appleby
<captkenn@m...>" <captkenn@m...> wrote:

Hi Roy,
It WAS the motor out of alignment,but such a tiny amount you wold
hardly credit!!

The new brass cross slide nut and gibs fitted and it is great now
Regards
Ken

--- In 7x12minilathe@..., "roylowenthal
<roylowenthal@y...>" <roylowenthal@y...> wrote:

Ken,
The belt always going to the same side sounds like the motor

shaft

is

not exactly parallel to the countershaft. On the 7x10 group,

J.W.

Early posted a hinged motor mount mod. that makes alignment

easier.

IIRC, it was within the last month or so.

Roy
(A USN type who was simultaneously "Special Sea & Anchor Detail

OOD"

and Engineer on a DDG. The book said I had to be 2 different

places

at once; the CO liked my "vectory at sea" shiphandling & believed

my

snipes were as competent as I claimed!)
--- In 7x12minilathe@..., "Capt. Ken Appleby"
<captkenn@m...> wrote:

Hi Roy,
That certainly is a comprehensive web site. Thanks for pointing

me

to it!

My belt doesn't 'walk' really . I centre it and by the time its

done a half

turn, it is already at the side, it then just stays there,

whether

you

reverse or not. It will be interesting to see what happens when

I

get some

spares to try.
Regards,
Ken
[A Navy 'Fresh Air' type, - away from the engine room fumes(;o)

ER

Chiefs

could never understand me - a deck type who built racing

engines -

A very

strange animal indeed!]
/ /
/,,/,,,,,,,,,,,,,,,,,,,,,,,,,,,,,||
触&濒迟;触):辞)=触&驳迟;露露露露触..触.................
&#92; &#92;'''''''''''''''''''''''''''''||
&#92; &#92;

From: "roylowenthal <roylowenthal@y...>" <roylowenthal@y...>
Reply-To: 7x12minilathe@...
To: 7x12minilathe@...
Subject: [7x12minilathe] Re: Yet More Questions
Date: Mon, 09 Dec 2002 05:30:43 -0000

_________________________________________________________________

MSN 8 with e-mail virus protection service: 2 months FREE*



[Non-text portions of this message have been removed]

Hi,
I have ordered a Milling Slide and table from Chronos. Has anyone
else fitted one and did you have to do much to get it to fit?

It looks a bit different to the "Little Machine Shop" one??
regards
Ken

Hi Roy,
It WAS the motor out of alignment,but such a tiny amount you wold
hardly credit!!

The new brass cross slide nut and gibs fitted and it is great now
Regards
Ken

--- In 7x12minilathe@..., "roylowenthal
<roylowenthal@y...>" <roylowenthal@y...> wrote:

Ken,
The belt always going to the same side sounds like the motor shaft

is

not exactly parallel to the countershaft. On the 7x10 group, J.W.
Early posted a hinged motor mount mod. that makes alignment

easier.

IIRC, it was within the last month or so.

Roy
(A USN type who was simultaneously "Special Sea & Anchor Detail

OOD"

and Engineer on a DDG. The book said I had to be 2 different

places

at once; the CO liked my "vectory at sea" shiphandling & believed

my

snipes were as competent as I claimed!)
--- In 7x12minilathe@..., "Capt. Ken Appleby"
<captkenn@m...> wrote:

Hi Roy,
That certainly is a comprehensive web site. Thanks for pointing

me

to it!

My belt doesn't 'walk' really . I centre it and by the time its

done a half

turn, it is already at the side, it then just stays there,

whether

you

reverse or not. It will be interesting to see what happens when I

get some

spares to try.
Regards,
Ken
[A Navy 'Fresh Air' type, - away from the engine room fumes(;o)

ER

Chiefs

could never understand me - a deck type who built racing engines -

A very

strange animal indeed!]
/ /
/,,/,,,,,,,,,,,,,,,,,,,,,,,,,,,,,||
触&濒迟;触):辞)=触&驳迟;露露露露触..触.................
&#92; &#92;'''''''''''''''''''''''''''''||
&#92; &#92;

From: "roylowenthal <roylowenthal@y...>" <roylowenthal@y...>
Reply-To: 7x12minilathe@...
To: 7x12minilathe@...
Subject: [7x12minilathe] Re: Yet More Questions
Date: Mon, 09 Dec 2002 05:30:43 -0000

_________________________________________________________________
MSN 8 with e-mail virus protection service: 2 months FREE*



[Non-text portions of this message have been removed]

Nick,

Yup this is pretty vexing 20 thou of taper is a lot. What is the lenght
of the piece the taper is over. Did you do the facing cut with the
compound screw or the cross slide screw?

Do you have a nice long piece of drill rod 1/2" x 8 or better? If so
chuck it in the 3 jaw and with a dial indicator mounted on the
carriage and touching the front side of the rod, does it turn close to
true? By resetting it in the chuck by slowly turning it while you
tighten the jaws you should be able to get it to less than .003" out of
round. Now slowly move the carriage to the tailstock end. Which
way does the dial indicator move and by how much? Now rotate the
chuck and how much out of round does it indicate?

I can see the taper being different depending on how you chuck
the stock, but all the same?????? When making the cut how did
you move the cutter? With the compound screw, the carriage
handwheel or use the power feed from lead screw?


Did you check the alignment of the centers by putting centers in
both head and tail stocks then move the tail stock up to the head
stock and then gently pich a piec of 5 thou feeler stock or similar
between the points of the centers. The shim should hang vertically
between the centers and be at right angles to the bed. Any twist or
lean indicates the centers aren't centered. A left lean is the tailstock
is high, a right lean is the tailstock is low. etc.

.
Bob




On 11 Dec 2002, at 9:54, Nick DeFeo wrote:

Roy:
The spindle shows fore/aft of .0005" difference. There is basically no runout of the face of the spindle when in motion. All gibs for the carriage, compound, and cross slide are adjusted with minimal play. I have not locked down the gibs on the compound/cross slide when taking these facing

cuts. Taking a face cut at the hs, shows no concave/convex, which leads me to believe the hs/compound alignment is true. This lathe cuts a .020" taper from the ts to the hs, no matter the method of securing the stock; 3 jaw, unsupported at ts, 3 jaw, live center at ts, dead center, live center at
ts. Pretty vexing situation. I have spent considerable effort and material in an attempt to get the lathe fairly accurate, and am convinced that it is time to swap this unit with a replacement. Perhaps there is something minor I am overlooking? Any thoughts would be greatly appreciated. Nick

"roylowenthal <roylowenthal@...>" <roylowenthal@...> wrote: What does a cross slide mounted indicator show when the front &
rear of the spindle are checked? It sounds like the HS is not
parallel to the ways, easiest measurement is spindle parallelism to
cross slide.
How much spindle run out is there?
Have you tried a test cut with the cross & compound gibs locked
down? Your chatter complaint makes me suspect one or both of them
may be moving during a cut.
Quick check for bed mounting distortion is to loosen the bolts &
try to rock the lathe; if it rocks, use feeler gauges or indicator to
determine the shim thickness for the non-contacting foot.

Roy
--- In 7x12minilathe@..., Nick DeFeo <ntdefeo@y...> wrote:

Good Morning Bob:
Here is what I have so far: Stock is 3/4" 12L14, HSS 3/8"

cutting tool - sharpened & honed, 3 jaw on hs and live center in ts.
With stock either chucked or supported by ts, I have indicated top
and rear of stock and corrected alignment using shims between the bed
and bench. Bolts are snug, but not tight to permit adjustment if
required. Whether the stock is held with just the 3 jaw, or supported
with the ts, the lathe still cuts a taper towards the hs in the
neighborhood of .02". I am using a Starret square base to level the
unit fore/aft and side to side. All readings using the level are dead
center, with no parallax error (all readings taken from top dead
looking down at the vial). Should I invest in a more precise level to
ensure these reading are true? I have checked for alignment at the
hs, center of the bed and ts areas. While it has been several years
since I have used a lathe, am I overlooking something minor here? All
carriage and compound gibs are properly adjusted and lubricated.
While cutting, I have used several fluids with the same results:
WD40, 10W oil with STP, and even kerosene. Are these lathes that far
out of alignment from the factory, or is this due to
shipping/handling? There was no damage to the carton or the lathe
when received, and I wonder if this unit should be returned for a new
one. While I am not opposed to making corrections/adjustments to get
acceptable results, this has been quite perplexing, to say the least.
Best regards, Nick

Bob Sunley <rosunley@s...> wrote:Check list time:

What are you cutting, type of metal/plastic, diameter and length.

How is it chucked, 3 jaw, 4jaw, between centers or combination.

Type of cutter, hss, carbide, a u-grind or factory insert.

Speed setting, power or manual feed.

Chattering and cutting tapers are two totally different problems.
Which do you want to fix first.

Cutting tapers can indicate a warped bed or tailstock not set
properly depending on how you are holding the workpiece.
which way is the taper?


Chattering can be any number of problems, wrong/no cutting lube,
wrong feed rate, tool height set wrong, wrong type of tool, too

fine a

cut, too agressive a cut, assorted gibs not adjusted properly, etc.
etc, etc.

Solidly mounting the lathe can cause tapered cuts as well if it

warps

the lathe bed

Need lots more info on exactly what you are doing.

Bob


On 9 Dec 2002, at 21:23, ntdefeo ntdefeo@y... wrote:

After setting and checking my Homier 7X12 lathe 9 ways to sunday,

I

am still turning tapers! As carriage is advancing towards the hs
assembly, the hs cutting tool starts to chatter, no matter what
adjustments are made. Is it possible that the bed it bowed/warped

in

such a manner that this machine should just be returned for a new
unit? I have never run up against such a perplexing problem. All
adjustments have been checked and rechecked for accuracy. Unit is
solidly mounted on a bench. Has anyone else run across this

problem?

Any comments? suggestions? short of heaving it into the trash?


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Nick,
Did you do your facing cut by moving the compound or the cross
slide?
Taper when turning between centers is indicative of tailstock
offset, tedious to eliminate on the 7xX lathes with their Achilles
tailstock.
You need a test bar for troubleshooting. If you don't have a
known straight, smooth bar, adjust the tailstock to turn one between
centers. Once you've got one, chuck it up and see what your
indicator shows.

Roy
--- In 7x12minilathe@..., Nick DeFeo <ntdefeo@y...> wrote:

Roy:
The spindle shows fore/aft of .0005" difference. There is

basically no runout of the face of the spindle when in motion. All
gibs for the carriage, compound, and cross slide are adjusted with
minimal play. I have not locked down the gibs on the compound/cross
slide when taking these facing cuts. Taking a face cut at the hs,
shows no concave/convex, which leads me to believe the hs/compound
alignment is true. This lathe cuts a .020" taper from the ts to the
hs, no matter the method of securing the stock; 3 jaw, unsupported at
ts, 3 jaw, live center at ts, dead center, live center at ts. Pretty
vexing situation. I have spent considerable effort and material in an
attempt to get the lathe fairly accurate, and am convinced that it is
time to swap this unit with a replacement. Perhaps there is something
minor I am overlooking? Any thoughts would be greatly appreciated.
Nick

SNIP

Roy:
The spindle shows fore/aft of .0005" difference. There is basically no runout of the face of the spindle when in motion. All gibs for the carriage, compound, and cross slide are adjusted with minimal play. I have not locked down the gibs on the compound/cross slide when taking these facing cuts. Taking a face cut at the hs, shows no concave/convex, which leads me to believe the hs/compound alignment is true. This lathe cuts a .020" taper from the ts to the hs, no matter the method of securing the stock; 3 jaw, unsupported at ts, 3 jaw, live center at ts, dead center, live center at ts. Pretty vexing situation. I have spent considerable effort and material in an attempt to get the lathe fairly accurate, and am convinced that it is time to swap this unit with a replacement. Perhaps there is something minor I am overlooking? Any thoughts would be greatly appreciated. Nick
"roylowenthal <roylowenthal@...>" <roylowenthal@...> wrote: What does a cross slide mounted indicator show when the front &
rear of the spindle are checked? It sounds like the HS is not
parallel to the ways, easiest measurement is spindle parallelism to
cross slide.
How much spindle run out is there?
Have you tried a test cut with the cross & compound gibs locked
down? Your chatter complaint makes me suspect one or both of them
may be moving during a cut.
Quick check for bed mounting distortion is to loosen the bolts &
try to rock the lathe; if it rocks, use feeler gauges or indicator to
determine the shim thickness for the non-contacting foot.

Roy
--- In 7x12minilathe@..., Nick DeFeo <ntdefeo@y...> wrote:

Good Morning Bob:
Here is what I have so far: Stock is 3/4" 12L14, HSS 3/8"

cutting tool - sharpened & honed, 3 jaw on hs and live center in ts.
With stock either chucked or supported by ts, I have indicated top
and rear of stock and corrected alignment using shims between the bed
and bench. Bolts are snug, but not tight to permit adjustment if
required. Whether the stock is held with just the 3 jaw, or supported
with the ts, the lathe still cuts a taper towards the hs in the
neighborhood of .02". I am using a Starret square base to level the
unit fore/aft and side to side. All readings using the level are dead
center, with no parallax error (all readings taken from top dead
looking down at the vial). Should I invest in a more precise level to
ensure these reading are true? I have checked for alignment at the
hs, center of the bed and ts areas. While it has been several years
since I have used a lathe, am I overlooking something minor here? All
carriage and compound gibs are properly adjusted and lubricated.
While cutting, I have used several fluids with the same results:
WD40, 10W oil with STP, and even kerosene. Are these lathes that far
out of alignment from the factory, or is this due to
shipping/handling? There was no damage to the carton or the lathe
when received, and I wonder if this unit should be returned for a new
one. While I am not opposed to making corrections/adjustments to get
acceptable results, this has been quite perplexing, to say the least.
Best regards, Nick

Bob Sunley <rosunley@s...> wrote:Check list time:

What are you cutting, type of metal/plastic, diameter and length.

How is it chucked, 3 jaw, 4jaw, between centers or combination.

Type of cutter, hss, carbide, a u-grind or factory insert.

Speed setting, power or manual feed.

Chattering and cutting tapers are two totally different problems.
Which do you want to fix first.

Cutting tapers can indicate a warped bed or tailstock not set
properly depending on how you are holding the workpiece.
which way is the taper?


Chattering can be any number of problems, wrong/no cutting lube,
wrong feed rate, tool height set wrong, wrong type of tool, too

fine a

cut, too agressive a cut, assorted gibs not adjusted properly, etc.
etc, etc.

Solidly mounting the lathe can cause tapered cuts as well if it

warps

the lathe bed

Need lots more info on exactly what you are doing.

Bob


On 9 Dec 2002, at 21:23, ntdefeo ntdefeo@y... wrote:

After setting and checking my Homier 7X12 lathe 9 ways to sunday,

I

am still turning tapers! As carriage is advancing towards the hs
assembly, the hs cutting tool starts to chatter, no matter what
adjustments are made. Is it possible that the bed it bowed/warped

in

such a manner that this machine should just be returned for a new
unit? I have never run up against such a perplexing problem. All
adjustments have been checked and rechecked for accuracy. Unit is
solidly mounted on a bench. Has anyone else run across this

problem?

Any comments? suggestions? short of heaving it into the trash?


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7x12minilathe-unsubscribe@...



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Hi Bob:

I've never seen a bb lathe but I understand that there seems to be
some small quality changes that make it somewhat better than the
usual 7 x 12. In fact I remember someone saying they had metal
change gears...

Here's a web site that has two basic programs that tabulate gear
strings for different threads including metric. One is Visual Basic
but the one I use is the old qbasic version. Both do the same thing.
It tells you the % error too. The program shows an error of .06% for
the two most common gear strings for .75mm. You can play with these
and see the effect on accuracy of having a 21 tooth gear.

http:www.cctrap.com/~varmint/alath.htm

I've made many changes on my lathe mostly for fun...It worked perfect
right out of the box.

Mike in Cranbrook B.C.






--- In 7x12minilathe@..., "sawadeee2 <bomo@s...>"
<bomo@s...> wrote:

Hi folks,

I've been flirting with the idea of a benchtop lathe for some time,
and it would be used mostly for photo/telescope adapters and parts.
Most of these do-hickies max out at about 2.5" diam. and a few

inches

long, and many would be threaded at .75mm pitch, various diameters.

Here in Canada, BusyBee is the equivalent to Grizzly et. al. Same
machines, different label. So....these are a couple of things I'm
wondering about:
What is the largest diameter stock I can chuck into the chuck? 3"?

2"?

I know the thread range is something like .05 - 2.0 mm, but what

are

the steps? Or to cut to the chase; can I cut .75mm threads?
On a more general level, how do you folks find the quality of the
small lathes? Is a lot of tweaking and modifying required, or do

they

work quite well out of the box?

Thanks,

Bob

Bob, you will find the answers to most of your
questions at my web site, mini-lathe.com

Frank Hoose


--- "sawadeee2 <bomo@...>"
<bomo@...> wrote:

Hi folks,

I've been flirting with the idea of a benchtop lathe
for some time,
and it would be used mostly for photo/telescope
adapters and parts.
Most of these do-hickies max out at about 2.5" diam.
and a few inches
long, and many would be threaded at .75mm pitch,
various diameters.

Here in Canada, BusyBee is the equivalent to Grizzly
et. al. Same
machines, different label. So....these are a couple
of things I'm
wondering about:
What is the largest diameter stock I can chuck into
the chuck? 3"? 2"?
I know the thread range is something like .05 - 2.0
mm, but what are
the steps? Or to cut to the chase; can I cut .75mm
threads?
On a more general level, how do you folks find the
quality of the
small lathes? Is a lot of tweaking and modifying
required, or do they
work quite well out of the box?

Thanks,

Bob



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7x12minilathe-unsubscribe@...



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__________________________________________________
Do you Yahoo!?
Yahoo! Mail Plus - Powerful. Affordable. Sign up now.

What does a cross slide mounted indicator show when the front &
rear of the spindle are checked? It sounds like the HS is not
parallel to the ways, easiest measurement is spindle parallelism to
cross slide.
How much spindle run out is there?
Have you tried a test cut with the cross & compound gibs locked
down? Your chatter complaint makes me suspect one or both of them
may be moving during a cut.
Quick check for bed mounting distortion is to loosen the bolts &
try to rock the lathe; if it rocks, use feeler gauges or indicator to
determine the shim thickness for the non-contacting foot.

Roy
--- In 7x12minilathe@..., Nick DeFeo <ntdefeo@y...> wrote:

Good Morning Bob:
Here is what I have so far: Stock is 3/4" 12L14, HSS 3/8"

cutting tool - sharpened & honed, 3 jaw on hs and live center in ts.
With stock either chucked or supported by ts, I have indicated top
and rear of stock and corrected alignment using shims between the bed
and bench. Bolts are snug, but not tight to permit adjustment if
required. Whether the stock is held with just the 3 jaw, or supported
with the ts, the lathe still cuts a taper towards the hs in the
neighborhood of .02". I am using a Starret square base to level the
unit fore/aft and side to side. All readings using the level are dead
center, with no parallax error (all readings taken from top dead
looking down at the vial). Should I invest in a more precise level to
ensure these reading are true? I have checked for alignment at the
hs, center of the bed and ts areas. While it has been several years
since I have used a lathe, am I overlooking something minor here? All
carriage and compound gibs are properly adjusted and lubricated.
While cutting, I have used several fluids with the same results:
WD40, 10W oil with STP, and even kerosene. Are these lathes that far
out of alignment from the factory, or is this due to
shipping/handling? There was no damage to the carton or the lathe
when received, and I wonder if this unit should be returned for a new
one. While I am not opposed to making corrections/adjustments to get
acceptable results, this has been quite perplexing, to say the least.
Best regards, Nick

Bob Sunley <rosunley@s...> wrote:Check list time:

What are you cutting, type of metal/plastic, diameter and length.

How is it chucked, 3 jaw, 4jaw, between centers or combination.

Type of cutter, hss, carbide, a u-grind or factory insert.

Speed setting, power or manual feed.

Chattering and cutting tapers are two totally different problems.
Which do you want to fix first.

Cutting tapers can indicate a warped bed or tailstock not set
properly depending on how you are holding the workpiece.
which way is the taper?


Chattering can be any number of problems, wrong/no cutting lube,
wrong feed rate, tool height set wrong, wrong type of tool, too

fine a

cut, too agressive a cut, assorted gibs not adjusted properly, etc.
etc, etc.

Solidly mounting the lathe can cause tapered cuts as well if it

warps

the lathe bed

Need lots more info on exactly what you are doing.

Bob


On 9 Dec 2002, at 21:23, ntdefeo ntdefeo@y... wrote:

After setting and checking my Homier 7X12 lathe 9 ways to sunday,

I

am still turning tapers! As carriage is advancing towards the hs
assembly, the hs cutting tool starts to chatter, no matter what
adjustments are made. Is it possible that the bed it bowed/warped

in

such a manner that this machine should just be returned for a new
unit? I have never run up against such a perplexing problem. All
adjustments have been checked and rechecked for accuracy. Unit is
solidly mounted on a bench. Has anyone else run across this

problem?

Any comments? suggestions? short of heaving it into the trash?


To unsubscribe from this group, send an email to:
7x12minilathe-unsubscribe@...



Your use of Yahoo! Groups is subject to

To unsubscribe from this group, send an email to:
7x12minilathe-unsubscribe@...



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---------------------------------
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Bob,
Where in Canada are you?

Jerry

Hi folks,

I've been flirting with the idea of a benchtop lathe for some time,
and it would be used mostly for photo/telescope adapters and parts.
Most of these do-hickies max out at about 2.5" diam. and a few inches
long, and many would be threaded at .75mm pitch, various diameters.

Here in Canada, BusyBee is the equivalent to Grizzly et. al. Same
machines, different label. So....these are a couple of things I'm
wondering about:
What is the largest diameter stock I can chuck into the chuck? 3"? 2"?
I know the thread range is something like .05 - 2.0 mm, but what are
the steps? Or to cut to the chase; can I cut .75mm threads?
On a more general level, how do you folks find the quality of the
small lathes? Is a lot of tweaking and modifying required, or do they
work quite well out of the box?

Thanks,

Bob

Good Morning Bob:
Here is what I have so far: Stock is 3/4" 12L14, HSS 3/8" cutting tool - sharpened & honed, 3 jaw on hs and live center in ts. With stock either chucked or supported by ts, I have indicated top and rear of stock and corrected alignment using shims between the bed and bench. Bolts are snug, but not tight to permit adjustment if required. Whether the stock is held with just the 3 jaw, or supported with the ts, the lathe still cuts a taper towards the hs in the neighborhood of .02". I am using a Starret square base to level the unit fore/aft and side to side. All readings using the level are dead center, with no parallax error (all readings taken from top dead looking down at the vial). Should I invest in a more precise level to ensure these reading are true? I have checked for alignment at the hs, center of the bed and ts areas. While it has been several years since I have used a lathe, am I overlooking something minor here? All carriage and compound gibs are properly adjusted and lubricated. While cutting, I have used several fluids with the same results: WD40, 10W oil with STP, and even kerosene. Are these lathes that far out of alignment from the factory, or is this due to shipping/handling? There was no damage to the carton or the lathe when received, and I wonder if this unit should be returned for a new one. While I am not opposed to making corrections/adjustments to get acceptable results, this has been quite perplexing, to say the least. Best regards, Nick
Bob Sunley <rosunley@...> wrote:Check list time:

What are you cutting, type of metal/plastic, diameter and length.

How is it chucked, 3 jaw, 4jaw, between centers or combination.

Type of cutter, hss, carbide, a u-grind or factory insert.

Speed setting, power or manual feed.

Chattering and cutting tapers are two totally different problems.
Which do you want to fix first.

Cutting tapers can indicate a warped bed or tailstock not set
properly depending on how you are holding the workpiece.
which way is the taper?


Chattering can be any number of problems, wrong/no cutting lube,
wrong feed rate, tool height set wrong, wrong type of tool, too fine a
cut, too agressive a cut, assorted gibs not adjusted properly, etc.
etc, etc.

Solidly mounting the lathe can cause tapered cuts as well if it warps
the lathe bed

Need lots more info on exactly what you are doing.

Bob


On 9 Dec 2002, at 21:23, ntdefeo ntdefeo@... wrote:

After setting and checking my Homier 7X12 lathe 9 ways to sunday, I
am still turning tapers! As carriage is advancing towards the hs
assembly, the hs cutting tool starts to chatter, no matter what
adjustments are made. Is it possible that the bed it bowed/warped in
such a manner that this machine should just be returned for a new
unit? I have never run up against such a perplexing problem. All
adjustments have been checked and rechecked for accuracy. Unit is
solidly mounted on a bench. Has anyone else run across this problem?
Any comments? suggestions? short of heaving it into the trash?


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Ken,
The belt always going to the same side sounds like the motor shaft is
not exactly parallel to the countershaft. On the 7x10 group, J.W.
Early posted a hinged motor mount mod. that makes alignment easier.
IIRC, it was within the last month or so.

Roy
(A USN type who was simultaneously "Special Sea & Anchor Detail OOD"
and Engineer on a DDG. The book said I had to be 2 different places
at once; the CO liked my "vectory at sea" shiphandling & believed my
snipes were as competent as I claimed!)
--- In 7x12minilathe@..., "Capt. Ken Appleby"
<captkenn@m...> wrote:

Hi Roy,
That certainly is a comprehensive web site. Thanks for pointing me

to it!

My belt doesn't 'walk' really . I centre it and by the time its

done a half

turn, it is already at the side, it then just stays there, whether

you

reverse or not. It will be interesting to see what happens when I

get some

spares to try.
Regards,
Ken
[A Navy 'Fresh Air' type, - away from the engine room fumes(;o) ER

Chiefs

could never understand me - a deck type who built racing engines -

A very

strange animal indeed!]
/ /
/,,/,,,,,,,,,,,,,,,,,,,,,,,,,,,,,||
触&濒迟;触):辞)=触&驳迟;露露露露触..触.................
&#92; &#92;'''''''''''''''''''''''''''''||
&#92; &#92;

From: "roylowenthal <roylowenthal@y...>" <roylowenthal@y...>
Reply-To: 7x12minilathe@...
To: 7x12minilathe@...
Subject: [7x12minilathe] Re: Yet More Questions
Date: Mon, 09 Dec 2002 05:30:43 -0000

_________________________________________________________________
MSN 8 with e-mail virus protection service: 2 months FREE*

Check list time:

What are you cutting, type of metal/plastic, diameter and length.

How is it chucked, 3 jaw, 4jaw, between centers or combination.

Type of cutter, hss, carbide, a u-grind or factory insert.

Speed setting, power or manual feed.

Chattering and cutting tapers are two totally different problems.
Which do you want to fix first.

Cutting tapers can indicate a warped bed or tailstock not set
properly depending on how you are holding the workpiece.
which way is the taper?


Chattering can be any number of problems, wrong/no cutting lube,
wrong feed rate, tool height set wrong, wrong type of tool, too fine a
cut, too agressive a cut, assorted gibs not adjusted properly, etc.
etc, etc.

Solidly mounting the lathe can cause tapered cuts as well if it warps
the lathe bed

Need lots more info on exactly what you are doing.

Bob

After setting and checking my Homier 7X12 lathe 9 ways to sunday, I
am still turning tapers! As carriage is advancing towards the hs
assembly, the hs cutting tool starts to chatter, no matter what
adjustments are made. Is it possible that the bed it bowed/warped in
such a manner that this machine should just be returned for a new
unit? I have never run up against such a perplexing problem. All
adjustments have been checked and rechecked for accuracy. Unit is
solidly mounted on a bench. Has anyone else run across this problem?
Any comments? suggestions? short of heaving it into the trash?

Hi Roy,
That certainly is a comprehensive web site. Thanks for pointing me to it!

My belt doesn't 'walk' really . I centre it and by the time its done a half
turn, it is already at the side, it then just stays there, whether you
reverse or not. It will be interesting to see what happens when I get some
spares to try.
Regards,
Ken
[A Navy 'Fresh Air' type, - away from the engine room fumes(;o) ER Chiefs
could never understand me - a deck type who built racing engines - A very
strange animal indeed!]
/ /
/,,/,,,,,,,,,,,,,,,,,,,,,,,,,,,,,||
触&濒迟;触):辞)=触&驳迟;抖抖触..触.................
&#92; &#92;'''''''''''''''''''''''''''''||
&#92; &#92;

From: "roylowenthal <roylowenthal@...>" <roylowenthal@...>
Reply-To: 7x12minilathe@...
To: 7x12minilathe@...
Subject: [7x12minilathe] Re: Yet More Questions
Date: Mon, 09 Dec 2002 05:30:43 -0000

_________________________________________________________________
MSN 8 with e-mail virus protection service: 2 months FREE*

Here's everything you ever want to know about timing belts, and
tons more trivia, besides:

Basically, if the belt is centered on the pulleys, everything is
fine. If the belt "walks" from one side to the other when you change
from forward to reverse, the alignment is probably OK, but the
twists/tensions of the reinforcing cords in the belt are not properly
balanced. Of course, the vendor that claims that sells "premium"
belts. Beware of idlers - if they ride on the outside of the belt,
they shorten its life.

Roy
(Retired Navy engineering type trying to keep the words short enough
for fresh air types.)

--- In 7x12minilathe@..., "Capt Ken Appleby
<captkenn@m...>" <captkenn@m...> wrote:

Hi Jerry,
Thanks for your response. I haven't had much dealings with belt
drives, now I have two, lathe and band saw, so I am being ultra
cautious I suppose. There is no noise and the belt has run quite
heavily, pretty well every day for the last six months. It shows no
wear on the 'teeth' of the belt, although I noticed this evening
what 'could be' a little separation of the surface on the back of

it.

I have ordered some new ones but won't get them until the New Year,
so I will try elsewhere, and change it anyway. I will take your
advice and check everything else too.
Regards
Ken

--- In 7x12minilathe@..., Jerry Smith <jfsmith@a...>
wrote:

Capt Ken,
As to your question one, I would with a lot of belt

driven

things

in my shop and lateral moves, pitch, etc, etc can cause a belt to

run in an

awkward way. You may have something not centered, or bent or a

rough spot

or even out of round. There are so many minor things that can

cause

the

problem.
You may want to inspect everything on this beast, to

make

sure

it's properly working. The normal case is something is just

noisy,

in the

extreme case, the belt wears un evenly and it breaks.

Jerry

Q1.
I have just refitted the power belt as I knew it was running off
centre - out and away from the lathe. I used Frank Hoose Jr's

advice

on setting the motor, but no matter what adjustments I make it

stll

wants to run right next to the edge. I notice he says this
adjustment 'should' cure the problem. Do I detect a little idea

that

it could be something else? Something bent?

There is what looks to me like a slight 'flap' in the straight

part

between the upper and lower gears, but maybe I am looking for it?
It's not hitting anything - I would just like to see it running

dead

centre.

Hi Jerry,
Thanks for that advice. I have just got one of the sanders you
describe I will look at it tomorrow.

In answer to your question, I'm a sea captain, my last ship was an Ocean tug
of 4,600 tons, about the size of a destroyer! See it here-




Cheers,
captkenn
/ /
/,,/,,,,,,,,,,,,,,,,,,,,,,,,,,,,,||
触&濒迟;触):辞)=触&驳迟;抖抖触..触.................
&#92; &#92;'''''''''''''''''''''''''''''||
&#92; &#92;

From: Jerry Smith <jfsmith@...>
Reply-To: 7x12minilathe@...
To: 7x12minilathe@...
Subject: Re: [7x12minilathe] Re: Yet More Questions
Date: Sun, 08 Dec 2002 20:04:39 -0500

_________________________________________________________________
Tired of spam? Get advanced junk mail protection with MSN 8.



[Non-text portions of this message have been removed]

Ken,
Some of my belt driven machinery, actual has something like an idler wheel on them. It allows some control of the belt. If you have seen some of the table top belt sanders I think they are 4 x 26 on the belt size and have a disc sander on the side. Check the belt control on it. you can get the belt to move side to side and tighten the tension.
That should give you an idea for what you can do for belt control. I have a couple of belt clutches around the shop for future projects, it's and old technology, but it still does work on some machinery
BTW what are a Captain in?

Jerry

Hi Jerry,
Thanks for your response. I haven't had much dealings with belt
drives, now I have two, lathe and band saw, so I am being ultra
cautious I suppose. There is no noise and the belt has run quite
heavily, pretty well every day for the last six months. It shows no
wear on the 'teeth' of the belt, although I noticed this evening
what 'could be' a little separation of the surface on the back of it.
I have ordered some new ones but won't get them until the New Year,
so I will try elsewhere, and change it anyway. I will take your
advice and check everything else too.
Regards
Ken

--- In 7x12minilathe@..., Jerry Smith <jfsmith@a...>
wrote:

Capt Ken,
As to your question one, I would with a lot of belt driven

things

in my shop and lateral moves, pitch, etc, etc can cause a belt to

run in an

awkward way. You may have something not centered, or bent or a

rough spot

or even out of round. There are so many minor things that can cause

the

problem.
You may want to inspect everything on this beast, to make

sure

it's properly working. The normal case is something is just noisy,

in the

extreme case, the belt wears un evenly and it breaks.

Jerry

Q1.
I have just refitted the power belt as I knew it was running off
centre - out and away from the lathe. I used Frank Hoose Jr's

advice

on setting the motor, but no matter what adjustments I make it stll
wants to run right next to the edge. I notice he says this
adjustment 'should' cure the problem. Do I detect a little idea

that

it could be something else? Something bent?

There is what looks to me like a slight 'flap' in the straight part
between the upper and lower gears, but maybe I am looking for it?
It's not hitting anything - I would just like to see it running

dead

centre.