Wrong settings in uc100?

[TheReaper]

I have a problem with one of the axes on my CNC. I have the same settings on all the motors and only one of them are giving me a headache.
I have my step/mm at 320 (micro-step at 1600step/rev) and have 1605 ballscrew.
Kernel freq at 25kHz (machine stops working with higher frequencies but my stepper driver should handle 100kHz, dont understand why)
Speed at 3000mm/min
Acceleration at 300mm/s^2

Motor is Nema 34
I: 6A
L: 8mH
V: 3.6V

I have attached a small clip on the problem. It is stalling, but not always. If I plug in another motor instead of the one on the axis, the problem follows to other motors.

[Soler]

If your speed is 3000mm/min this is 50mm / sec. 1605 ball screw mean 5 rev's sec

At 1600 steps per rev X 5 rev / sec thats 8000 Pulses per sec, required, double that to go high low and this is 16000 or 16khz. Thats already 64% of your clock cycle before you try to run a second axis. I would suggest running at at higher clock speed or lowering the steps per rev.

[ger21]

Thats already 64% of your clock cycle before you try to run a second axis.

You get 25Khz for each axis, not total.

Try reducing the acceleration to see if it helps.

[TheReaper]

After a lot of testing, trying to change the velocity and acceleration to see if the motor is getting better, no change in the stalling of the one axis. I had tried another output on the breakout board before, and this did not change the problem either, but I di try the last axis output pins (16 and 17), and the problem disappeared. So I believe it is the breakout board that is failing me...

But I don't understand why I can't use kernel frequency higher than 25kHz when I put it on 50kHz; all motors stop working, can this be the breakout board as well?

[dezsoe]

Perhaps you have a low quality break out board with slow opto couplers. Make a photo or write the exact type or send a link to check it.

[TheReaper]

https://www.amazon.de/-/en/gp/product/B ... UTF8&psc=1

I bought this package, can't find any good information about the breakout board, not on their web site either.
I have ordered a new breakout board from another brand.

[Robertspark]

that BoB is just a generic / updated one of these with SMT components

https://www.longs-motor.com/breakout-board.html

(pdf link on website to the old THT boards)
https://www.longs-motor.com/wp-content/ ... hp?id=1139