Axis run too far

It is not common for a stepper motor to over run, a step loss problem would normally be a stall or too short a movement. You could try to dramatically reduce acceleration.
Did you try the moves that were recommended?
The wiring changes?

Yes I can turn the coupling by hand if the machine is on.

Well that is not good, All the axis or just the bad one?
Some boards drop down the amps when at rest, but still should be able to hold their position.

Dave has experience with these boards.
You might want to post your config files for review.
Perhaps start over with the set up paying close attention to the step and direction timing.
Re check your latency, any errors messages?

Rick G

No, the wiring changes can I try first on the weekend.

I can all axis turn when the machine is on, but I can't shift the portal. The Motor has 0,93 Nm, is it not normaly to turn it by a big coupling?

The step and space time is 15000 ns. There are no error messages. The latency is 12000ns but I've typed in 16000ns.

the max y-speed is 10 mm/s and the acceleration is 100 mm/s².

I will test with decreased acceleration on the weekend. Thaks for your help

So, I've found the fault! After I changed the X and Y axis the Y runs exactly to the target. Consequential mechanism is okay and the step time is okay, too!

The fault musst be the chinese driverboard! right?

After I changed the X and Y axis the Y runs exactly to the target.

Perhaps you could explain exactly what you changed.

Rick G

I've changed the x and y pins in the config and the output wirings on the tb6560 board. After this the over runnig is on the x axis.

I 've order another TB6560 board Letmathe . It will arrive in the next days and I'am very hopefully to get better results in matters of the over running and a smoothly step sequence.

I've changed the x and y pins in the config and the output wirings on the tb6560 board.

What happens if you change the pins back in the config to their original settings without changing the output wiring?
Of course the wrong axis will respond to moves but does the problem stay with x axis?

Rick G