Going crazy with Arduino CNC control!

[Ole_W]

@ttraband

Since you mention this is your first CNC, I want to repeat a warning that you must completely power down the system before working on any of the stepper motor wiring. The drivers can blow invisibly if a motor is connected or disconnected while the driver has power.

Thank you! I guess that was the mistake I did with the last set. I will take care in future!

@ttraband

If the stepper drivers get too hot, they protect themselves by limiting the current they try to pass, which can result in hesitation of the stepper motors. You mentioned the heat sinks came off - have you put them back on? I would also suggest running a fan across them until you get the amperage tuned.

That was with the set before, the new set is hot, but not as hot as the last one. I can touch it.

@ttraband

What size power supply are you using to power the screw terminals of the CNC shield? Mine is marked as being good up to 35V dc.

That was my thought too. I use this https://www.roboter-bausatz.de/p/mean-well-steckernetzteil-12v-5a-gst60a12-p1j It is 12V and 5A.
But I thought amp is the important size!? The shield takes 12 Volt, and as far as I understand, more Volt would destroy the shield!? Please correct me if I am wrong.
Do you think a more powerful power supply is required, does that cause the interruptions error?

EDIT:
Now I tried the shield I used before, but replaced the drivers with new one and this works with very minor interruptions. It seems interruptions started after driver are heat up.
I have not used a housing for the tests, I have not found a good one for GX16 Aviation Connectors at thingiverse.
I just have a fan above the shield.
Is the heat the reason for the minor interruptions?