Found the root cause, a pin inside of the stepper motor wasn't soldered! Had to take the case off the stepper motor to see this, apparently it would make a connection under the correct phase of the moon, but then on others would just stop working. After soldering I have went thru a half a dozen prints, a few several hours in length, with no issues.by BigDan - Printing
I didn't think of checking the driver temperature; I did check the motors and both were cool to the touch. I'll remove the cover on the control board and check the driver temperature next time it occurs and post what I find.by BigDan - Printing
I have a Hictop 3DP11 printer and am very pleased with it except for this odd behavior: Occasionally when printing, the print will be nearly done (80% complete) and either the X or Y axis starts to grind/stutter and make a loud racket like it's jammed, but I don't see a jam, ultimately the positioning of the motor fails, I get extruded filament in places it shouldn't be and the print fails. Anyby BigDan - Printing
While performing a homing sequence, either G28 or G29, the Z axis squeaks quick badly; however during normal operation the printer is fine. I have tried lubricating the bearings and screw guides on the Z axis with valve oil (trumpet type is what I had) and that works for a while, but quickly stops working after a day or so. Since there is no noise during normal operation, I was wondering if thereby BigDan - Mechanics