Does anybody know how to calibrate x and y axis as my x and y axis abit off. The physical measurement of the x axis is 300mm but it gives me 298.5mm.
I have tried everything which include changing the motherboard to other specs, tightening of x axis belt, reinstalling of coreldraw software but it is still the same.

My laser cutter is currently using Ketai Gold 2014 board. Is there anyway i can change the firmware on the motherboard to modify the stepper setting?

Please kindly advice? Thank you in advance.