Fairly new user here. I have a MK2 30 X30 and I recently upgraded the controller from LB to SLB and I am using G-Sender 1.4.9.
I know that there have been multiple posts with this issue and I think I have tried just about all the advise given and still getting the same issue.
I have run a program a few times and the same thing seems to keep happening. About 1/3 into the program the Z axis zero starts to drift lower. And after running a job about 12 inches in length the Z zero changes by almost 0.25 inch down.
Things that I have tried.
Checked the bit hasn’t moved out of the collet. I measured the amount sticking out before and after and it hasn’t changed.
Set Firmware 37 to on for Z axis
Firmware 212 is set to “35”
Firmware 1 is set to “255”
Z axis stepper motor connection stayed connected through out.
I ran the program and then stopped it when I noticed it doing dropping down. At this point I set 1 to 255 and re-zeroed and started the program again. It again followed the exact same profile as was previously cut.
I thought upgrading to the SLB would help solve issues but It appears to have caused more issues. I wasn’t having this problem before.
@DallasD.Woodworks I had similar issues and also tried every suggestion I could find in these forums to no avail. I recalled reading about the changes in the SLB and firmware that they changed microstepping from 8 on the original longboard to 32. On a hunch I reverted back to 8 and seems to be working as expected now.
@DallasD.Woodworks@aarseneault may have your solution. I wonder what the effect is of using both $212 and $1. The tech manual for the SLB specifically says not to use $1=255 with that board. Have you tried without that setting?
@gwilki After the issue fist came up I tried just $37 and $212. When that didn’t work I also tried $1=255.
Currently I am only running with the Makita Router. I am surprised I am getting this as this tends to only be an issue when switching to a heavier spindle.
I am currently trying a run after adjusting the micro stepping back to 8 for the Z axis.
@aarseneault I reverted the microstepping for the Z Axis back to 8 and ran a program without any stock and it didn’t drop the z axis zero this times.
I will be running it with stock to confirm but I believe this seems to have fixed my problems. Thanks.
@DallasD.Woodworks great news. We can also try a microstepping of 16 to gain some of the benefits but not lose all the torque. I have not experimented on that yet but may at some point.
@chrismakesstuff here is another incident where he had to go back to a microstepping of 8 to prevent z axis dropping.
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