I noticed these lines during a facing operation (using a 1/2" straight router bit):
I printed out Ryan’s DW 660 Perpendicularity Tester, and got these results:
With the tester pointed to the front of the MPCNC:
[attachment file=“pointed towards the front.JPG”]
With the tester pointed to the back of the MPCNC:
[attachment file=“pointed towards the back.JPG”]
I tried playing with the tightness of the bolts on the gantry, but they didn’t seem to do anything.
Everything “seems” to be plumb, but I’m probably not measuring correctly. The back supports are 1mm high, but I don’t think that would account for these symptoms as my build is for a 24"x24" work area.
Any thoughts on how to troubleshoot this? Would lowering the back supports help? (Also, I wonder what caused the bit to leave that one circular shape.)