Hi everyone... i'm new on co2 laser and cnc machine, i build my own co2 laser cutting machine and i use:
1. RDC6442G-B for laser controller
2. longs-motor ( https://www.ebay.com/itm/Longs-Motor...-/200958027214 ) for stepper motor
3. hy-div268n-5a for stepper driver

the problem is.. home position always change every time i turn on the machine.... anyone please help me .....