I am just finished installing and during calibration, I am having a Z axis issue I think When I use the Z probe, zero out at home position and then begin a cut … the bit lowers down on material too far and cuts as it moves from home position to the first path. Then it seems like its cutting a bit deeper than programmed.
I then did a manual Z axis with the paper trick … and while the bit stays above the material from the home to the first path, the cut seems to get a little deeper with each pass. Not a extreme amount but by the end the cut there’s a noticeable difference.
Both issues lead me to believe my Z needs calibrating… but from all the threads I’ve read, I can’t come up with the answer.
Yes make sure to select the proper Z axis type. Rerun machine setup just to make sure. It changes the steps/mm value which affects cutting depth. Search the forum for stepper calibration procedures to really dial it in.
PHIL … YES for all three. I did come across your stepper calibration excel sheet and have not had the chance to accurately measure the steps which will be my next thing tonight, assuming Easel will be back online.
Things seemed to maybe have rectified itself after Easel crashed and reset today. So I am thinking after I changed to the Acme screw for Z it didn’t save… so when I reset again tonight and did a test carve it seems to be accurate. Is there any place in grbl to see which one is selected other than the $102 =188.976??
I did calibration and all X,Y, and Z are accurate … z probe is exactly .59in and set as such.
Well, I am now having the issue show up again. I’ve cut a simple design in a pine board with decent success. Put down another board to cut it a second time … and DISASTER. After cutting four letters you can definitely see that each letter got a little deeper … (I’d like to post a picture but unsure how?)
I re-calibrated the z axis … by measuring that when you jog 1 inch it actually jogs 1 inch … and I would say it is very close to perfect.
So I am at a loss … can not figure out why it works sometimes. Could it be something with a loss of steps with speed of cut or material being cut?
If it’s a nylock nut, loctite shouldn’t need to be used is what I thought. The nylon part acts just like loctite I believe.
I replaced my set screws with M3 x 8mm patch screws from McMaster-Carr and they were a tad long and were hitting the bearing retaining screws. I changed the bearing screws to be shorter (6mm instead of 8mm) so they don’t interfere.
McMaster is a good online source and, for me, is 1 day ground shipping because they ship from Atlanta for me.
I just tried to find the exact size on the installation instructions and even the CAD explode view and can not find size. M3 but what length … Does your 10mm socket head get in the way, those seem rather long to me.