LittleMachines DROs and dials
I have a Littlemachines lathe with really awful DROs.? ?They use V389 batteries that last about a minute.? ?I have the following questions:
1. I'm working on a 3D printed battery holder that allows a AAA battery instead.? Is anyone else interested in these?
2. As I researched this, I realized that some of you have found linear DROs that may even be better to position the carriage and cross slide.
Can you recommend the best option?? It looks like magnetic ones are good for this application, and some cheap Chinese ones are really capacitive, and not as good.??
3. Have any of you converted from DROs to old fashioned dial handles?? That would be nice in addition, since those don't require any batteries, etc.? I kick myself every time I think about having bought the DRO version.
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Re: making Colchester Lathes
I have owned Colchester Lathes in past.
They very good lathe.
The only problem I found was the 80¡ã bedway harder to make tooling.??
Dave?
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Re: making Colchester Lathes
I think many on this list already know this, but when they say a "5 inch" lathe in the video that refers to the radius that will clear the bed.? Some parts of the world use radius.? Others, such as in the U.S., use diameter.? So, the mini lathe might be 7 inch swing (diameter) or 3 1/2 inch swing (radius) depending on where you are.
Charles E. "Chuck" Kinzer
On Monday, February 19, 2024 at 07:51:48 AM PST, davesmith1800 <davesmith1@...> wrote:
A lot labor in just casting.?
Dave?
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Re: making Colchester Lathes
A lot labor in just casting.?
Dave?
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Re: Variable speed motors
I think he's also on ebay as thecustomcrafter
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On Monday, February 19th, 2024 at 9:22 AM, WAM <ajawam2@...> wrote:
Great find. Thank you for sharing that.
On 2/19/2024 9:13 AM, Jay Fougere wrote:
Sorry to bump an older thread but in doing some research on the
controller board used in the sewing machine motor kit I had purchased
I found the following site.
Please note that I have no affiliation to this site nor have any
experience with his products, but he seems to offer a full line of
conversion kits and parts for these motors. This includes full kits
for the mini-lathes and mini-mils along with a ton of other machines.
It also appears he does some repair services as well.
-Jay
On 2/9/24 21:45, Tony Smith wrote:
For some strange reason laser cutters use 3-phase steppers rather
than the usual b-polar ones. Makes the drivers a bit expensive &
rare by comparison.
Tony
*From:*[email protected] [email protected] *On Behalf
Of *davesmith1800
Sent: Friday, 9 February 2024 2:06 PM
To: [email protected]
Subject: Re: [7x12MiniLathe] Variable speed motors
It interesting thd different ways I have seen for low speeds
First on AC motors lots of poles you charge the poles for different
speeds but very costly motors.
Then was just was belts and or gears.
Variable pitch belts and charge the gear Works but still gears at one
was costly too but not bad.
The AC/DC motors usd a Variable transformers. This first lower cost
motor setup 1 to w to 1 to 100 speed reduction
The electronic speed control start with small motors but cost was a
lot lower.
The stepper motors in Printers was big change. In 1970's they did
not need encoders for low cost printers. If skip a a few spaces out
of over a hundred thousands you not notice. Next use on low cost CNC
equipment. For most part they used two phases motor.
Later I saw mini 3 phase motor but I saw first controls in 1960's but
winding your own motors.
Now we know as brushless DC motors . Some maybe two phases I just
have seen it .
Some dates can earlier history on web can be do to the writer error.
I know mine maybe off too.
The 1960's is where lot changes switch from tubes to transitions
Dave
Ralph Lehotsky 2:12pm
Yes - it's probably geared down quite a bit for that application,
so power is not as important there
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Re: Variable speed motors
Great find.? Thank you for sharing that.
toggle quoted message
Show quoted text
On 2/19/2024 9:13 AM, Jay Fougere wrote: Sorry to bump an older thread but in doing some research on the controller board used in the sewing machine motor kit I had purchased I found the following site.
Please note that I have no affiliation to this site nor have any experience with his products, but he seems to offer a full line of conversion kits and parts for these motors. This includes full kits for the mini-lathes and mini-mils along with a ton of other machines.? It also appears he does some repair services as well.
-Jay
On 2/9/24 21:45, Tony Smith wrote:
For some strange reason laser cutters use 3-phase steppers rather than the usual b-polar ones.? Makes the drivers a bit expensive & rare by comparison.
Tony
*From:*[email protected] <[email protected]> *On Behalf Of *davesmith1800
*Sent:* Friday, 9 February 2024 2:06 PM
*To:* [email protected]
*Subject:* Re: [7x12MiniLathe] Variable speed motors
It interesting thd different ways I have seen for low speeds
First on AC motors lots of poles you charge the poles for different speeds but very costly motors.
Then was just was belts and or gears.
Variable pitch belts and charge the gear Works but still gears at one was costly too but not bad.
The AC/DC motors usd a Variable transformers. This first lower cost motor setup 1 to w to 1 to 100 speed reduction
The electronic speed control start with small motors but cost was a lot lower.
The stepper motors in Printers was big change.? In 1970's they did not need encoders for low cost printers. If skip a a few spaces out of over a hundred thousands you not notice. Next use on low cost CNC equipment. For most part they used two phases motor.
Later I saw mini 3 phase motor but I saw first controls in 1960's but winding your own motors.
Now we know as brushless DC motors . Some maybe two phases I just have seen it .
Some dates can earlier history on web can be do to the writer error. I know mine maybe off too.
The 1960's is where lot changes switch from tubes to transitions
Dave
??? Ralph Lehotsky 2:12pm
??? Yes - it's probably geared down quite a bit for that application,
??? so power is not as important there
|
Re: Variable speed motors
Sorry to bump an older thread but in doing some research on the
controller board used in the sewing machine motor kit I had
purchased I found the following site.
Please note that I have no affiliation to this site nor have any
experience with his products, but he seems to offer a full line of
conversion kits and parts for these motors. This includes full
kits for the mini-lathes and mini-mils along with a ton of other
machines.? It also appears he does some repair services as well.
-Jay
On 2/9/24 21:45, Tony Smith wrote:
For
some strange reason laser cutters use 3-phase steppers
rather than the usual b-polar ones.? Makes the drivers a bit
expensive & rare by comparison.
?
Tony
?
?
?
It
interesting thd different ways I have seen for low speeds?
First on AC motors lots of poles you charge the poles for
different speeds but very costly motors.
Then was just was belts and or gears.
Variable pitch belts and charge the gear Works but still
gears at one was costly too but not bad.
The AC/DC motors usd a Variable transformers. This first
lower cost motor setup 1 to w to 1 to 100 speed reduction?
The electronic speed control start with small motors but
cost was a lot lower.
The stepper motors in Printers was big change.? In 1970's?
they did not need encoders for low cost printers. If skip a
a few spaces out of over a hundred thousands you not notice.
Next use on low cost CNC equipment. For most part they used
two phases motor.
Later I saw mini 3 phase motor but I saw first controls in
1960's but winding your own motors.
Now we know as brushless DC motors . Some maybe two phases I
just have seen it .?
Some dates can earlier history on web can be do to the
writer error. I know mine maybe off too.?
The 1960's is where lot changes switch from tubes to
transitions?
Dave?
Ralph Lehotsky 2:12pm? ?
Yes - it's probably geared down quite a
bit for that application, so power is not as important
there
--
-Jay Fougere
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Re: Linear Digital Readout Scales
[Default] On Thu, 15 Feb 2024 18:48:59 -0800, "mike allen" <animal@...> wrote: at least ya can walk into a Harbor if theres a issue . When adapting a calipers to become a DRO, you'll probably want to drill holes in it and even cut off the jaws. I suspect HF are not going to to very forthcoming when you show up with that hacked-up calipers to claim warranty. -- Helge
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Re: Armstrong threading tool (was "[LL] Lantern toolpost dimensions")
Bill Williams
Feb 17? ?
My attempt to mll down an Armstrong tool holder ended in blunting the inserts in a carbide face mill! Be forewarned. Bill in Boulder
FYI? Using carbide is not best at times for milling hard steel like the Armstrong tool holders.? If trying to mill hard steel use grade C5. They not as hard like grade C2 and brittle.? I found HSS tool bits does better job but not fast like carbide.? Dave?
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Re: Armstrong threading tool (was "[LL] Lantern toolpost dimensions")
Bill Williams
Feb 17? ?
My attempt to mll down an Armstrong tool holder ended in blunting the inserts in a carbide face mill! Be forewarned
To cut that steel I think 1060 . You slow speed and HSS will work. Use dark cutting oil.? Brush lots of oil as you cut.? Dave?
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Re: Armstrong threading tool (was "[LL] Lantern toolpost dimensions")
I know I say mill?
But I plan on using a 4?" Angle grinder and 16g stone and just grind the top where set screw hit. .
In will take about 5 minutes it will be done.?
It is faster than setting up mill for a hard cut.?
Dave?
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Re: Armstrong threading tool (was "[LL] Lantern toolpost dimensions")
Strangely enough that's how I got my Armstrong knurling tool to fiit in my square turret!? ?Bill
I did it once with a belt sander.
Mike Taglieri?
On Sat, Feb 17, 2024, 11:55 AM Bill Williams < BWMSBLDR1@...> wrote: My attempt to mll down an Armstrong tool holder ended in blunting the inserts in a carbide face mill! Be forewarned.? ?Bill in Boulder
I have two Armstrong tool holders I plan to mill down.? One use for the follower rest and triple knurling tool.?
My last lathe I also a American tool holder and did need to mill.
Dave?
DAVID WILLIAMS
Feb 16? ?
Dear Dave, Thank you for the images & information. Very interesting. (Every day is a day a school). David UK
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Re: Armstrong threading tool (was "[LL] Lantern toolpost dimensions")
I did it once with a belt sander.
Mike Taglieri?
On Sat, Feb 17, 2024, 11:55 AM Bill Williams < BWMSBLDR1@...> wrote: My attempt to mll down an Armstrong tool holder ended in blunting the inserts in a carbide face mill! Be forewarned.? ?Bill in Boulder
I have two Armstrong tool holders I plan to mill down.? One use for the follower rest and triple knurling tool.?
My last lathe I also a American tool holder and did need to mill.
Dave?
DAVID WILLIAMS
Feb 16? ?
Dear Dave, Thank you for the images & information. Very interesting. (Every day is a day a school). David UK
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Re: Armstrong threading tool (was "[LL] Lantern toolpost dimensions")
My attempt to mll down an Armstrong tool holder ended in blunting the inserts in a carbide face mill! Be forewarned.? ?Bill in Boulder
I have two Armstrong tool holders I plan to mill down.? One use for the follower rest and triple knurling tool.?
My last lathe I also a American tool holder and did need to mill.
Dave?
DAVID WILLIAMS
Feb 16? ?
Dear Dave, Thank you for the images & information. Very interesting. (Every day is a day a school). David UK
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Re: Armstrong threading tool (was "[LL] Lantern toolpost dimensions")
I have two Armstrong tool holders I plan to mill down.? One use for the follower rest and triple knurling tool.?
My last lathe I also a American tool holder and did need to mill.
Dave?
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Show quoted text
DAVID WILLIAMS
Feb 16? ?
Dear Dave, Thank you for the images & information. Very interesting. (Every day is a day a school). David UK
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Re: Armstrong threading tool (was "[LL] Lantern toolpost dimensions")
Dear Dave, Thank you for the images & information. Very interesting. (Every day is a day a school). David UK.
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Show quoted text
On 16 Feb 2024, at 23:45, davesmith1800 <davesmith1@...> wrote:
?Here a few photos? <Screenshot_20240216-144325_Edge.jpg> <6129933985ba2dd568074bd7.jpg>
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Re: Extension cross slide
Looks great, Dave!
On Friday, February 16th, 2024 at 8:03 PM, davesmith1800 <davesmith1@...> wrote:
[Edited Message Follows]
[Reason: Error ]
Here photos of the exstension in use.?
Nice have the longer feed cross slide
=
===========
.
Attachments:
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Re: Extension cross slide
Here photos of the exstension in use.? Nice have the longer feed cross slide =  =========== . 
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Re: Armstrong threading tool (was "[LL] Lantern toolpost dimensions")
 Note the bottom mill off to fit holder. Not my holder Dave?
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davesmith1800
chrisser