Chinese 6040 stepper drives

[Jed Clampit]

i have just gone to set the job up and zeroed everything and noticed the stepper motor is creeping while on standby. i run the cutting program anyway just to see how it performed and when cutting in slow areas like arcs or corners the motor is noisy as if missing steps

[Clive S]

i have just gone to set the job up and zeroed everything and noticed the stepper motor is creeping while on standby. i run the cutting program anyway just to see how it performed and when cutting in slow areas like arcs or corners the motor is noisy as if missing steps

I would check thee stepper motor connections at the bob to see if they are loose it could also be EMI does it move when the spindle is off. Which stepper is it all or just one?

[Jed Clampit]

it is only on the axis that the new board operates and it only seems to do it when the spindle is running

[Clive S]

it is only on the axis that the new board operates and it only seems to do it when the spindle is running

Then that sounds like EMI

[Jed Clampit]

what is EMI Clive ?

[john swift]

EMI is Electromagnetic interference

Is it just the new axis driver that's moving on its own ?

does your break out board look like this TX14175


John

[magicniner]

Then that sounds like EMI

Clive is spot on here.
The EMI often tracks up the mains lead from the spindle motor/driver and back down the lead to the PSU for the control system, separating the two to plug-in points opposite ends of the ring main can help, or running the spindle motor/driver from the furthest possible socket via an extension lead.
Ideally you'd fit separate EMI filters to the mains inputs close to the equipment.

[Jed Clampit]

thanks for the replies. i did a quick search and found these

https://www.cnc4you.co.uk/Electrical...FI-Suppression

[magicniner]

They should work, but if you have any particularly sensitive drivers they might still jitter a bit, I had some particularly sensitive drivers and ended up using filters and the long lead to a remote plug trick ;-)