Is there a way to true up XY in Swift CNC? I cut some panels this morning and noticed that the XY is not square. On a 310mm x 2100mm rectangle, it is askew by a full 1mm across the short 310mm length. Since these two pieces are mirrors of each other that grows to ~10mm offset across the ~2100mm length. Both pieces are identical, but since they mirror each other, the error gets multiplied.
This error was confirmed by measuring diagonals and by woodpecker square. Diagonals are off by a full 2mm. I also confirmed the Vcarve file rectangle is not askew and shows 90 degrees.
I will have to true this up manually with track saw, otherwise the assembled piece will have a large twist from bottom to top.
Happy to help true this up if there is a process that can be performed.
The main thing you should do when you have critical parts that go a long distance across the bed Is 1.bring the machine close to home
2. shut machine down
3. Pull the gantry with your hand to the bump stops.
while still holding it start the machine and wait for the drives to boot before releasing.
Being a stepper machine with a rack and pinion machine and only one limit switch on the gantry it can get off easily
Thanks! I’ll give that a try on my next run. It performed the all axis home at start like normal, but sounds like a little extra pull prior to turning on is best practice. I’ll probably also drill a quick 4 corner pattern on the perimeter of my piece next time and verify the diagonals before commencing.
I was able to clamp the pieces together and shave them back to true with my track saw. Only lost 2mm overall length…
Just to make sure I fully understand… by pulling the gantry toward me from the “center”, I am ensuring that the right and left uprights are each fully bumping against their respective stops (y=0 left and right arm) prior to turning on.
The x=0 of the head on the gantry is automatic with a limit switch, so no need to also ensure head bumps an x=0 stop?
Yes exactly, the reason this is needed on the y onlyis because there is only 1 limit switch for two steppers/two rack and pinions. so if it looses a step and gets crooked it will never truly be fully corrected with a regular homing sequence
