Quote Originally Posted by Roxy View Post
Do you have your EEPROM turned on. If so, it sounds like you are getting some bad values and should clear it (set it to the default firmware settings).
I do have EEPROM enabled. I'm using Clough's firmware from his website, which had it enabled by default.

By resetting it, do you mean running an M502? When I do that, and try running G28 and G29 again, I get the same result