Epoxy granite vertical mill build log

[Nick]

Chaz - First movements have been very rewarding, hoping the pace picks up now.

I'm near Hull about an hour from Goole, that's a very kind offer, it might be a while till I could get over. That's reassuring that you've got them to work. I'm having a hard time making sense of the Chinese-English hybrid manual. I would be using them in the "position mode" initially, have you had any issues with overshoot? Are you using "open collector input mode" or using the suggested "AM26LS31 similar line drive"? Or 0-10v? I found the below video, which was bit concerning having to play around with the internal PID settings...

https://www.youtube.com/watch?v=qYgnIKDoVPY

Nick

[JAZZCNC]

I'm having a hard time making sense of the Chinese-English hybrid manual. I would be using them in the "position mode" initially, have you had any issues with overshoot? Are you using "open collector input mode" or using the suggested "AM26LS31 similar line drive"? Or 0-10v? .

I've used both Analog and Differential inputs on these drives, both work ok but Analog does require more work with tuning if closing the loop back to the controller
If you're using a decent controller with Step & dir then you won't need to mess around with line drivers as it will provide differential outputs.

I found the below video, which was bit concerning having to play around with the internal PID settings...

Don't be concerned because it's quite normal to have to tweak the PID settings. Servos are tuned according to the load they have to move so it should be no surprise that some tweaking is needed as it's impossible for them to be tuned correctly at the factory or when sat on a bench.

To how much tweaking needed depends on many factors including Input Mode and how or where the loop is closed. If using full closed-loop back to the controller then affectively 2 Pids have to be dealt with. First, the motor needs to be tuned to the drive using the drives PID. Then the position loop for the Controller needs to be tuned using it's PID.

Don't be afraid of PID tuning it's not rocket science but does involve a bit of black magic to perfect. Mainly it's just tweaking few settings until it behaves how you'd like. Little patience is all that's needed.

Edit: Checked today and the motors are the 600W version.