I tried to run a project without the bit to see what will happen and it seems that when the X motor starts it skips and throws the whole carve out on the X axis. I moved the board to a new location and the same thing is happening.
the first pic is showing off center, the next pic is how far off X0 it was
The lead screw turns by hand with no problem, the bolts are all snug, and it doesnt happen all the time. Sometimes it’s ok after homing and sometimes not. Not sure if the move to the longmill was a good move.
You didn’t say if you are using the SLB controller or not. When I upgraded to the SLB I had similar issues. I had to turn down the x-axis speed and acceleration down just a bit as the motor was missing steps. I have a PWN spindle as well and that extra mass may be a contributor to the issue.
I suggest you look at these firmware setting in gsender
$110 (x-axis speed) I’m running at 5000, the default is 5500
$120(x-axis acceleration) I’m running at 800, the default is 1000
You may need to adjust these until you find ones that work for your setup
Because I get z-axis drift because of my spindle weight, I also set
$37 with z enabled and $212 to 10%
I hope it works for you. I’m guessing $120 x-axis acceleration is a bigger contributor to the issue than speed but haven’t gone back to yet to confirm that hunch.
Hang on to your hat, here’s what I did----I changed the settings as you suggested with no change to what was happening. Just for grins and giggles I started checking the wheels and the X axis wheels were good so I was checking the Y axis and noticed that the top rear wheels were not riding center on the rails and the front bottom wheels couldn’t be turned by hand. I unscrewed the right side rail, did a full front/back movement on the Y axis to get the wheels lined up properly and screwed down the right side again. Wheels are now riding on the Y rails properly, re-adjusted the Y axis wheels, reset zero on the project, crossed my fingers and hit the go button----no noise from the motor, ran the gcode without a bit 5 times and each time it returned to zero as it should. I thought I had everything lined up, adjusted and set up the right way, but somewhere along the line I missed a step. Hopefully this has taken care of the problem,j but when something else comes up I’ll be sure to come here for help. Thanks for the feedback and suggestions, I kept the settings you mentioned in the firmware just to be on the safe side… Thanks again.
