Can't Calibrate, X axis is off

I switched print heads as my old one was damaged, and now I can’t calibrate it. It thinks points 1 and 4 are far to the left of the print bed. Points 2 and 3 are to the left also but still on the print bed. Basically it seems the machine thinks the print head is actually more to the right than it actually is. Any suggestions? Thank you.

Is it still going to the same place (far left, looking from the front) when it homes?

Share some pictures or video of what it’s doing.


Embarrassingly I realized I reassembled it incorrectly. Thank you for the offer of help.

Yeah, using the wrong mounting holes is a common mistake. You’re in good company. :slight_smile: