I'm pretty new to 3d printing, and i've been having trouble preheating both the extruder and bed of my 3D printer. I'm using Octoprint to control the printer, if that influences the issue. 

In the video I set the target temperature of the 3D printer's extruder to 200C, and it turns off, of which I've only noticed occurs when the 3D printer returns "TargetExtr0:0", and I haven't been able to find the exact reason as to why this keeps occuring. When I type in an m109 command to heat the extruder, which I understand prevents any other commands from running (m190 for the bed), this is the only time the printer extruder is able to fully preheat to the target temperature that I initially set (something like "M109 S215"), before shutting itself off again. The printer also only consistently overrides the target temperature, turning the extruder heating element "off", after the M105 command (reporting temperatures) is run exactly 5 times, which I hope may be relevant to how to solve the issue

This has prevented me from getting the 3d printer to maintain the target temperature I set the bed and the extruder to, and due to the way I understand how to use g code to heat the printer, the only solution I could find to maintain a stable temperature of both the extruder and bed would be to input "M109" every couple seconds, wait for the printer to reach extruder target temperature, before heating the bed again (its temperature falling during the M109 command) with "M190".

This all occurs without running any g code, which I've read can reset target temperatures while running, and without any "Thermal Runaway Prevention" error messages occurring in response to the printer thinking it's overheating or something related.

None of these problems occur whenever I actually run a gcode file for a print (something like a 3D Benchy). The bed heats and maintains temperature before the extruder heats and maintains temperature, and begins to print with no issues, before the file is either paused or cancelled, and the temp of the extruder and bed fall again.

This leads me to the primary reason I'm trying to maintain a target temperature for the printer, which is to iterate print settings, where if the target temperature drops, and the extruder and bed turned "off", I have to wait almost 15 minutes waiting for now-cooled-down heat elements to warm up again (bed, then finally the extruder) to print an updated g code file, which is incredibly slow.

I would appreciate if anybody might understand the issue, and could point out a solution to this problem, being that I am unable to preheat the printer, or maintain any sort of target temp for both the extruder and bed, using both g code and the Octoprint UI, which is hampering my ability to update printer settings, or quickly print different g code files in succession.

Thanks!



Help! 3D Printer Extruder and Bed Target Temps Keep Switching to "off"