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Atlas 618 electronic lead screw

W

WilliamTom

Active Member
Good afternoon members. I have purchased an Atlas 618 lathe and going to install electronic lead screw. Looking for information on conversion, stepper motor size, timing pulleys and belts. What worked and what didn’t work. My lathe has been reconditioned and now ready to start working on mounting motor, pulleys ,encoder, stepper control, power supply, brackets used. Can anyone shed some useful ideas, lve scan YouTube and found a few ideas. Looking for club members ideas now. Any little bits will help.

Thanks.
 
I did an ELS conversion on my CX706 a few years back. I have a surplus stepper and drive now that I'm using servos. Where are you located?
 
Yes lve been in contact with him and bought his kit, very nice guy with lots of answers. Now I’m looking for ATLAS specfic information, no need to reinvent the wheel
 
WilliamTom said:
Yes lve been in contact with him and bought his kit, very nice guy with lots of answers. Now I’m looking for ATLAS specfic information, no need to reinvent the wheel
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There's a follow on the Hobby Machinist site who made a CAD model of a 618 if I recall correctly.
Here you go. Some top-tier CAD work here. The files are in post #12

I'm making a CAD model of my Atlas 618 and need some help

I got a seat of the Solidworks CAD system for Christmas (whooah!) and in the middle of January I started modeling the Atlas 618 lathe (serial number 011120) that a friend gave to me a while back. The lathe is now completely disassembled and the parts are being measured using hand tools like...
www.hobby-machinist.com
 
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David said:
There's a follow on the Hobby Machinist site who made a CAD model of a 618 if I recall correctly.
Here you go. Some top-tier CAD work here. The files are in post #12

I'm making a CAD model of my Atlas 618 and need some help

I got a seat of the Solidworks CAD system for Christmas (whooah!) and in the middle of January I started modeling the Atlas 618 lathe (serial number 011120) that a friend gave to me a while back. The lathe is now completely disassembled and the parts are being measured using hand tools like...
www.hobby-machinist.com
Click to expand...
Thanks l had not seen that. I downloaded all the files thanks!
 
I have @jcdammeyer 's ELS on my Busy Bee B2227L. My goofy method was to mount the stepper motor on the change gear banjo, just four spacers and a chunk of 1/4" aluminum plate. Timing belt was a silent gear and chain set I had in the ancient parts bin, and the spindle timing gear is another old gear I had in stock fitted to the "A" change gear axle. No drilling or modifications to the lathe, all bolt on. IR opto sensor as the spindle timing signal.

Would be easy enough to do the same setup using one of the toothed belts and matching sprockets used for 3-d printers. I have a NEMA34 stepper, a middle-range NEMA23 would probably work just fine on a 618. Do a search on this forum for "ELS Electronic Lead Screw Concept" to see some photos of my set-up.
 
WilliamTom said:
I’m is southern Ontario in St Catharines, where are you located?
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Ottawa, will trade for a 0.2-1.2" Micrometer
5291D5B6-7F29-4663-897D-32B60991DA5B.jpeg
 
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trlvn said:
This style:

145-193-mitutoyo__71191.1475762642.jpg

Very handy for inside measurements. Can also do hole-to-hole measurements (within range).

Craig
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Ya, you are right, I have seen inside mics like that. I don't own one though. I'd grab a Mit like that in a heart beat if I ever spotted a used one at a good price.

Thanks for the reminder.
 
slow-poke said:
I can't imagine a 0-1" inside, the probes require some space, 0.2 to 1.2" is fairly common and handy for measuring press/shrink fit bearing pockets.
Click to expand...

Ya, but when I read your note it didn't say anything about "inside", and since I don't have any inside mics, I quite naturally assumed outside.
 
I see I did not specify "inside", I was thinking it but did not type it, oops.

Focusing on the non metric variety, I noticed the better ones have the extra graduations for tenths and the cheaper ones don't. Considering the intended use I'm going to wait for one with the tenths graduations.
 
slow-poke said:
Focusing on the non metric variety, I noticed the better ones have the extra graduations for tenths and the cheaper ones don't. Considering the intended use I'm going to wait for one with the tenths graduations.
Click to expand...

Ya, not cheap. ITM normally has lower (not lowest) prices on mitutoyo and they want 300 for that one.

Mitutoyo Inside Micrometer at ITM

I'll wait with you for a used one.
 
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