Currently working on adding a filament runout sensor to my M2 Rev. E. I've find a few how to's for the wiring and the basic firmware modifications: http://forum.makergear.com/viewtopic.php?f=10&t=6408 https://www.thingiverse.com/thing:1887387 https://forum.lulzbot.com/t/simple-filament-runout-sensor...

what are we looking at???? The reason the issue was only arising after homing and raising the build plate. Once the X axis was home and the lead screw knob turned clockwise to raise the plate, an indentation in the makergear logo on the knob was grabbing the left extruder's thermistor wire, stallin...

not consulting Occam's Razor Well, that's obvious! In retrospect, anyway. [grin] The third item in the Debugging Rules poster over my workbench applies: "Quit thinking and look". It seems I can always come up with a complex fault that doesn't actually match the obvious-in-retrospect evidence, alas....

accelerations during homing to match that of jogging Now that I look at the source again, at least for (obsolete) Marlin 1.1.0, there's only one acceleration setting. Seeing as how homing works, it's probably OK. I appear to have made the mistake of not consulting Occam's Razor, but the problem is ...

Another bit of info. I had a thought for another test; manually pressing the z stop with the z axis only half way down the z screw. Same exact issue, immediately catches upon raising the platform post homing. So that proves there is no specific spot that causing it, to motor simply cannot lift the b...

cannot make it catch by any other means What's different: the different speeds & accelerations used during homing vs. manual jogging vs. normal operation. Thank you as always Ed! I followed your cleaning instructions and reassembled, no luck. I felt little to no resistance on the linear rails, drow...

Hello! I have a M2 Rev. D, upgraded to Rev. E , and upgraded to Dual extruders for this particular issue. It's been intermittent for a few months now, but has recently become unavoidable. During the start up sequence, after homing, when the build plate is brought up to the nozzle to purge it catches...

Good to know! I'll make sure to keep an eye on it. Thanks for the help Ed!

Cameron

First off, take a breather. I have two M2s that have been running for years, and I can count on two hands how many times I've had to level them, there's something else going on. I use the M2 QuickStart when I do need to level. The 4 point leveling is pretty simple, turn right to raise the corner, tu...

It was indeed an intermittent break in one of the thermistor wires of extruder 0 about a third of the way down the wiring harness! There were no physical signs of a break, and took an immense amount of force to finally get it to break at the damaged area.