x , y and z motors are not accurate

when i move the x , y or z motors by 6 cm with universal gcode sender they move about 1.3 cms how can i get them to move their own size

@yippiez You need to calibrate them, I am not familiar with your software but it should be an option in the menu. If not you can do it manually by editing Grbl parameters or use my software to do it, since it updates the firmware you can then go back to using whatever software you like.

what are the commands i should send?

@yippiez You would need to calculate the correct steps per mm and send those as $100/$101/$102 parameters. To do this you need to know the current steps and then do the math to determine the new values  or use T2Laser's menu and it'll do that for you.

@Zax thanks i have another problem with z when i set it up to be 8 mm deep when it starts it goes up by 4 and only goes 4 mm deep and does 4 empty turns

@yippiez What software?

@Zax universal gcode sender it cuts perfectly y and x are accurate now but there is the problem with y it still cuts but it takes double the time since its doing half of the turn not doing anything

@yippiez Sorry I don't know this software, I only support T2Laser and other general machine questions if I can help. It sounds like the Gcode is not optimized.