Okay, could not sleep last night and almost read this whole thread.
So I just gathered some more infos:
Motors 4x: Motech Motor, MT-2303HS280AW-C 1.26Nm, 1.8°/step, 175 oz
Power supply: 24V 360W
Y-GT3-Timing-Belt 20 tooth, 6 mm
Machine size: 1000mm x 1000mm
I attached a picture of the driver and of the motor description.
Some infos about my “setup”. I have to admit that the cables are quiet short and
all are crossing each other. It is quiet messy.
Using 18awg cables from drivers to motors (through a drag chain) and 20awg cables from drivers to Arduino (R3) screw shield.
Currently there is NO cooling except the heatsinks. But the problem already occurs after 30 seconds of moving in the
air and it seems like it is mostly the X-axis.
Hope this helps a little.
And I just ordered 2x 120mm fans to make sure this is not the probem.