Atlas 618 Measurement Needed Please

Thanks I've been piecing it together for about 6 months. The motor is a Torque Systems DC servomotor, they were a EG&G Rotron company long since out of business. Probably about 1/2 horsepower; I got it from a local silicon valley surplus outfit called Halted specialties, 50$. Lucky find. Using a KB electronics speed control. Better than this lathe deserves LOL
MS
 
Here's a better picture of it- I'm sure I'll never find another one like it. It has 4 brushes, plus a tach and encoder.DSCN0185.JPG
I could connect the tach back to the KB controller for better speed regulation, but the standard armature
feedback is working fine for now.
 
Awesome set up Mark . My set up is a bit vintage (but that's the way I like it , as long as it works proper) However I need a more powerful motor , I have to spin start (by hand ) my motor, it is like 60 yrs. old . Pics to be posted soon . ( paint is drying )
 
Post some pix when you get a chance; we all like "tool cheesecake photos" ha ha
Be careful too spinning that motor, fingers are not replaceable (no user-serviceable parts inside)
You're in Long Beach? My best friend grew up in Culver City.
Mark S.
 
Pat,

If your motor is a capacitor start type the problem is probably the starting capacitor. Should be mounted on the side of the motor. If that isn't it, second most probable will be the centrifugal switch. And of course, it could just be mis-wired.
 
Sorry Mark about getting onto my stuff , Robert my motor is a non capacitor type .I just tested it again and it starts ok but just not in some gears . I was all juiced up to start a new thd. and show you guys my set up , but we just changed to win 10 and now my cam won't work . The guru will be over in a few days and we will get it sorted out .
 
I'm very interested in this conversion also. Will be watching to see how it works out. If it goes well, I'll likely be wanting to do a similar conversion on my Mark 2.
 
Hi Randall- So you want to do a head transplant too? Which Mk2 head do you have the roller bearing or the ball?
Mark S.
 
There are actually three headstock variants.

Atlas 3950 and Craftsman 101.21200 have ball bearings and cast iron headstock 383-017.
Atlas original 10100 and 10200 have roller bearings and cast iron headstock 383-020.
Atlas final version 10100 and 10200 have roller bearings and Zamak headstock. May still have 383-020 case in. Few of these were made and very few still survive.

According to all of the parts lists, headstock type will not affect what you would have to do to put a 618 or 101.21400 headstock on the machine.

If you are serious about doing that, I would call Clausing and ask for PDF or TIF copies of the 618 and 10100 bed drawings. You are also going to have to have the complete lead screw and left bearing assembly including change gear bracket (banjo) off of a 618 or 101.21200. The change gears and the right bearing are the same M6- parts on both vintages. You will also need the 618 tumbler assembly as nothing on the one on the MK2 will fit.
 
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Mark:
Yes, I've been wishing my Mark2 was a 618 since I got it. I also have an early Craftsman 12-inch and like how the headstock is built much better than the MK2 along with speed selection. I may or may not actually do the conversion, but that will partially depend upon success and difficulty of the head transplant. I currently have the cast iron headstock with Timkin Roller bearings on my Mk2. It's really in excellent condition right now.
Robert:
Thank you for the information so far. I like the idea of asking Clausing for copies of the bed drawings. Sounds like there will be more parts swapping than I had imagined, but if parts swapping is all that is needed...should be manageable.
 
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