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.

I've now replaced both hotend thermistors, and am still getting mintemp on both USB and SD card prints.

Extruder 0 and 1 both have a brand new thermistor, that was the first thing I did. Is it possible it's the bed thermistor? If not I guess I'm going to have to start the process of looking for breaks in the cables. Also, would it be possible for extruder 0(while not being used in this print) to cause...

Issue has returned running from SD. Now during the startup script, the Z axis weirdly binds when lifting. Screen shows Err. MINTEMP.

https://youtu.be/SJLpwYjbjSE

Can you confirm whether the actual bed temperature is fluctuating? If you have an infrared heat gun, check the temp when it ready particularly low or high, as well as neutral. It could be as simple as a failing thermistor on the heatbed.

airscapes wrote: ↑

Sun Mar 08, 2020 1:43 am

At this point to rule out anything other than the USB connection I would run a bunch of prints from the SD card.

Printing from SD card seems to be working fine! I guess I'll order another USB cable!

Hey Ed! I am indeed using S3D. I changed the cable to another known working usb cable, and changed the USB port on my PC. It seems to have worked for a few prints, but is back to the problem. It seems to be worse after the printer is "warmed up" from a previous print. Nothing else has been changed a...