Chinese Servo tuning

[3Dogs]

At the moment I'm cutting air on the bench, so in that respect "they just work". But when I have them installed for real, I will need to tune them. At which point the true horror of the "tuning" process will become apparent.

I suppose one option may be to use the LinuxCNC controls to do that without changing the Lichuans. For now, that isn't at the front of the list.

I've just made my own HTD3 pulley due to the crap backlash in the Chinesium pulleystock used in the pulleys I got from Bearingboys. Wasn't planning on doing that but it seemed the only concrete solution, short of buying loads of random pulleys from various suppliers and hoping some were ok. Also gave me the opportunity to break out the 4th axis again. This uses a Yaskawa Sigma servo and motor.

With an iPhone and Windows 10, this forum doesn't know which orientation to use on the photos, although they look OK in W10. Every forum seems to be different! What is the way to fix it here?

@Muzzer -
Did you ever get the Lichuan A4 and servos running and tuned?
I am thinking of buying these, but the lack of support for the tuning process is worrying.

[Muzzer]

I've been using them on both my lathes and they have been fine. There's no real option to tune the drives themselves but you can tune the higher level system. I have closed loop position control on one of them (the Bantam, using Linuxcnc and glass scales) and the response is pretty impressive. Main thing is to make sure the torque and power are adequate for your machine. Best to err on the safe size, not least as they are fairly low cost. The other thing I did was change the fans, which sounded like a nest of angry wasps.