Centroid Community CNC Support Forum

Cool, thanks. Curious how the turret works. Quite an ambitious project...very nice work!

I’d love to see some pics and details of the turret, if you could.

Cool! Looking forward to some pics! When I got my Tormach mill, I didn’t think I’d like the shuttle controller but I find it’s faster and easier to use than the wireless MPG. The only thing I wish it was wireless.

Following sling here as I had grand plans to convert my 440 to run on an Acorn. What encoder ring sensor would be good for 10k rpm? I don’t often run at max rpm but do often enough.

Brendan, do you have an ATC? That’s my larger concern...how to get it working under Acorn control.

Yup. High RPM encoders are tough to find. You'll be limited by mechanical rpm or electronic bandwidth, or probably, both. The ones I used were limited to about 6K rpm with the 1024 ppr resolution I chose. It takes pretty expensive bearings to handle 10K rpm and a 1000 line encoder is approaching 70...

Tblough used a nice encoder on his Bridgeport conversion. I forget where he got it but they offer many options that would make fitment much easier. They weren’t cheap but not outrageously expensive either.

That’s great! Now I don’t have to sell my older Acorn with Pro software to upgrade...thank you for finally offering this option!

Cool, thanks for the info! I guess I’ll try them and see. I don’t mind the cost as I only need one. Would be worth it to me to have to avoid the skim cut and measure ordeal. Stupid question because I don’t use the lathe much and I’m not home at the moment...if I home X, then take a skim cut and meas...

I am using Clearpath servos (low res versions...can’t recall the steps/rev but think it’s 800?) so, unfortunately, unable to output the encoder signal. I didn’t know DMM added encoder output capability to the Dyn2 drive. I have an unused Dyn4 drive but don’t have a motor that would suit this applica...

I found some precision limit switches at Automation Direct. They claim 5 micron accuracy but have only 5mm travel. Would these switches be suitable for setting X home position so I don’t have to take a skim cut and measure every time I power up the lathe?