So I have my machine together and running and have cut some things with it but have run into some issues with the Z-axis
I was cutting a test piece with a 3d profile surface generated in cambam when the cutter plunged around 1/2" into the material and cut some big gouges across it. I heard the change in pitch from in the house and went out to hit the e-stop. It was cutting fine up to that point and then just made the plunge...
After that I lowered my accelerations and tried again and it finished the part fine. I figured that it skipped a bunch of steps on a retract move.
So I flipped the part over to machine the back and about 1/4 way through the finish cut I go out there and find it air cutting about an inch above the piece. Again, it looked fine up to the point where it stopped cutting. It appears that it did it in 1 move instead of slowly over a series of passes. I've had it do this a few times in the past and then lowered my accelerations to fix it.
I think my current was a bit low on the drive so I bumped that up some and I'll have to try some more. I think I'll get a new lead screw as well as I have a 1/2-10 single start on there so I have to spin it a bit fast, though at 50 ipm it is still within the motor's powerband. I'll be swapping in some 12mm bearing rails that I picked up as well so I'll check to see if there is any binding in the screw as it sits now.
any other ideas on what might be causing this?