In this example it is trying to move the arm back beyond the physical limit - at other times it is trying to move the head too far to the left. Most times restarting has resolved the issue - this time multiple restarts has not fixed the problem.
Clicked the link and am presented with “Part of Penn State?
Penn State uses your network username and password to login to Box. Continue to login to Box through your network.”
That did the trick. I’d turn off the machine, and unplug it for thoroughness’ sake, and place the head directly under the camera. Good for support to see regardless.
I did try restarting with the head/logo under the camera. It looked like it calibrated and went back to the back “home” position. Then a few minutes later it started rumbling again…
Twice today I powered mine on with the head in the usual upper-left position, and it went down to the center while continuing to drive left, making that hideous stepper grinding noise. It happens quickly so I wasn’t able to leap for the off switch. I worry that every time it does this, it’s wearing something down a bit more, gradually going out of alignment. Limit switches literally cost 10 cents. I just don’t get it.
I’ve had the same thing happen. Multiple times. Always on the left. To the best of my knowledge, everybody who’s reported the issue has had it on the left. Never the right. Manual homing has always fixed it for me.
I’m not arguing for the design or against it, just suggesting how to avoid it . Your machine, your prerogative.
@TAPshooter, That behavior happened maybe 3 out of ten times, but it bothered me enough seeing it that I just start it off that way. The head homes under the camera, and from there it knows where the limits are, it doesn’t have to feel for a limit switch at the end of travel.
What I did was take a sharpie and put a dot on the lid flange above where the center of the tube is and a dot on the gantry where the head sits under the camera. Helps speed the routine at power up.