Centroid Community CNC Support Forum

That worked, tried probing the DB25 and I got step/dir at the drive. Drive threw a following error with a jog command that resulted in no motion, but it's progress. I'll pick up a DB25 and go from there.

What worked? DB25
Following error is drive to motor tuning most likely, or you tried to rapid faster than the drive/motor might be capable of. Try to not slowly and work your way up. Were the drives and original motors kept paired?

DB25 worked.

Old drives were Axor MiniSpeed 130s that had incompatible control inputs.

I still think you'll have less headaches with new drives and motors...

Within 1 hour I had a response from Machdrive. Looks like I might have the step/dir active high/active low inverted. I had inverted it for testing then connected to the DB25 and didn't switch it back to normal. I thought the indicator lights were supposed to be lit, then flash when active, but they should be the opposite. I have to give major respect to both Machdrive and Centroid for their responsive support, I would highly recommend either product.

Forgot I had this video of the Speedy 207 running flawlessly before I tore her apart. Gotta break an egg to make an omelette!



I am still having issues getting the x axis encoder to talk to the drive. Finally decided to hook up the Y axis for comparison, and it worked basically right away. Even got some decent motion using the wave generator in the drive’s tuning software.

So something is up with the x-drive or the encoder, or there’s just a bad connection.

I ultimately gave up on the DC servos and went with Clearpaths on all 3 axes. They run beautifully, until I turn on the spindle, that is. I tried changing the VFD-spindle cable out for a fully shielded one. All 3 servos immediately shut down with a step timing error. I tried a different 24V power supply too. All signal lines are shielded.

I noticed there is continuity between the Acorn board COM and earth ground. I thought they were supposed to be isolated to prevent ground loops? I don’t have an AC neutral in the cabinet as it is 3 phase mains, so the Meanwell PS uses the ground bus for neutral.

As-built attached. The 1k resistors on the signal outputs are recommended by Teknic for longer signal runs. I wasn’t able to get the servos working consistently without them.

Please post pictures of your control cabinet...

Still in the testing phase so it’s kind of a mess. Don’t judge.

The MeanWell RD-35B will run equally well on a 240VAC supply. If that is all you have available in the cabinet, then just hook two of your power legs. Do not use chassis ground as a power return path.