Upgrading my 80Watt Chinese M2 Nano Laser to Ruida 6445S with DM556 and New Motors

Okay. I finally had time to get back to this today.
Setting the no return option did fix the crashing of the laser head immediately after homing.

But I’m stuck on how to change the quadrant to quadrant III. Any tips?
Thanks so much for all your help. It’s invaluable.

It seems I’m not the only one who has experienced this exact issue before. Explained so well here:

I am reading the setup guide link shared there now in hopes it will make sense and I can figure it out.

Still taking all input anyone may have. Thank you.

Update:
Well, it still doesn’t work.

  1. It does home successfully to the right rear where the limit switches are.
  2. The jog arrows are moving the head in the correct directions … But since I am still in the wrong quadrant, it seems they don’t work correctly ‘at first’. If it try to go down or left nothing happens. I assume because the machine thinks it is at the limit of 0.0 after homing.

If I press the up arrow the machine with crash but it seems this allows the belt to slip a bit and that frees up some slack to move south thereafter a bit. Same thing when I try to go right. It will crash but then I can go left a little bit thereafter.

So I am still in the wrong quadrant, correct?

IF so, I still have no idea how to change the quadrant. How do I easily change the quadrant so the machine knows that top right is 0,0 and that the usable work area is all down and to the left? 400x600mm? Thanks.