I received my 4.1 about 3 weeks ago and immediately started the assembly and set-up. First try was anchored to the floor and tried to run calibration, failed. I built an 8x10 frame to run it at 30 degree horizontal and tried to run the calibration again, failed. I have uploaded all the recent firmware (I think). I have run “retract all", “extend all", “apply tension” tried lowering the Z and it doesn’t move. The Z readout changes value but it does not move. I have done all the “unplug it", “move the screws with your fingers”. I set each screw to the exact same height by hand.
At this point I have an expensive cumbersome and near useless router with a plastic dinner plate attached.
What am I doing wrong?