[drk]

Hi ,
I am an electronics engineer and have been able to make stepper motor drives and build my RS232 interface board for a pcb drilling software, but i have completely failed in building a good XYZ system with all axes perpendicular to each other.
As a result, what should have been drilled along a rectangle is being done along a parallelogram.

Any guidance as to what I can do to get things right.

Thanks