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New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Posted: Fri Mar 04, 2022 4:34 pm
by suntravel
Started to convert my lathe to CNC

Spindle will be driven by a JMC 1.5kw Servo maybe with C-axis since I can switch the Servo from speed to position mode with an input
Z-axis also JMC Servo 0.4kw 220V
X-axis Stepperonline CL Stepper 4Nm

Late I will build me a 8 Station turret

First I had to make a spindle extension, to mount the beltdrive for the encoder, and anyway the original design with open spindle in the gearbox was crap.

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Still waiting for the servos, but got the Acorn today and made the cabinet with the stuff I already have. Pretty easy as expected, simply following the manuals, and the X-axis ist working already.

When the cabinet ist completed I will make the brackets for the Servos and ball-screws. Hope to get this done in one weekend....

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Uwe

Re: New Build, PM2700 lathe with Acorn

Posted: Fri Mar 04, 2022 6:57 pm
by cnckeith
nice work! thanks for posting, looking forward to more.

Re: New Build, PM2700 lathe with Acorn

Posted: Sat Mar 05, 2022 2:39 pm
by suntravel
Made the drawings for the parts I need to fit ballscrews in the lathe and well the best DIY CNC is nothing with a crappy machine, so i reworked the slides. They were fitted with an angle grinder and had lots of play. Machined them for a snug fit with the mill, scraping would habe been better, but to much effort for a hobby lathe. But well now it cuts of steel like a real lathe :)

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Uwe

Re: New Build, PM2700 lathe with Acorn

Posted: Sat Mar 12, 2022 2:37 pm
by suntravel
Acorn mill builds Acorn lathe :)

Seems to be more time consuming than I thought. Made the parts for the X-axis stepper today and for holding the Z ballscrew nut.

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Uwe

Re: New Build, PM2700 lathe with Acorn

Posted: Sun Mar 13, 2022 4:20 pm
by suntravel
Got both ballscrews fitted today, kind of tricky to make room for the X-axis nut, but works :)

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Uwe

Re: New Build, PM2700 lathe with Acorn

Posted: Mon Mar 14, 2022 2:48 pm
by cnckeith
right on! nice.
you should put all these photos in a google photo album and then keep adding to it as you go along.

Re: New Build, PM2700 lathe with Acorn

Posted: Fri Mar 18, 2022 6:00 pm
by suntravel
Started a google album for the new progress..

https://photos.app.goo.gl/w9edyv7sKFZWxopJ6

Had to fit the X-axis ballscrew with new balls, because I droped the Nut, not the funniest thing to do :D

Both axis installed now, but still waiting for the servos for the spindle an z-axis

Uwe

Re: New Build, PM2700 lathe with Acorn

Posted: Fri Mar 18, 2022 6:33 pm
by cnckeith
thanks, link doesn't work for me.

Re: New Build, PM2700 lathe with Acorn

Posted: Fri Mar 18, 2022 6:45 pm
by suntravel
cnckeith wrote: Fri Mar 18, 2022 6:33 pm thanks, link doesn't work for me.
Never used google album before...

... changed the link, hope it works now.

Uwe

Re: New Build, PM2700 lathe with Acorn

Posted: Fri Mar 18, 2022 6:49 pm
by cnckeith
works now.. looks fantastic! looking forward to more photos and video (yep you can put video in the google photo album as well!)