Hi all, I’m trying to figure out why the second operation I’m running with a second (smaller) bit is causing a repeatable offset in all three axes. I’m using (free) Fusion 360.
My first (roughing) cut is done with a 6mm bit in an ER-11 collet that I bought online. The second (finish) pass is done with a 3mm bit from Amazon. Neither bit has tool information available so I measured them with a manual vernier caliper (yes I need to buy a digital one) and entered custom tool data in Fusion. It’s certainly possible that my numbers are off, but I don’t think that would explain my problem.
Every time I run these operations, the second bit’s pass is 1mm too deep in the Z direction, ~0.7mm offset in the positive X direction, and ~0.7mm offset in the negative Y direction. This result is repeatable. I tried using 0.5mm “Leave stock” on the first pass and I’ve tried without, same result.
When performing the tool change, I re-set the Z position of the work origin (shorter bit) but I do not change the X or Y. I use the calibration card, and I’m using an origin on the stock that is not cut.
I’ve included my gcode files. Let me know if I should upload anything else.