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I have been having issues with Thermocouple 0 so I have been printing exclusively with the left extruder. Originally I left the thermocouple 0 connected and what I was seeing was that sometime during the print of using the left extruder it would decide to try to switch to the right one which was not at temp and had no filament loaded. At first I thought I had sliced it incorrectly with simplify3d, but confirmed it was all set to tool 1/left. So I tried printing it again without making any changes to the file and it got to a different point and it happened again. The left extruder stopped and the right extruder was over the part where it should be putting out filament. I am using octoprint which had never had an issue until I ran into problems with the right thermocouple. So next I disconnected the right thermocouple, fan and heating element and although I received an error when the machine booted that it was not connected and it showed n/c on the display I was able to start printing again. This time I was able to get through 2 prints without a problem so I thought I was in good shape while waiting for the replacement part to arrive.

Today I started another print using the left extruder with the right disconnected and after about 6 hours it appears to have done the same thing. The right extruder was tracing the part and the left had stopped extruding.

I rebooted the machine/octoprint and reset the machine to factory settings and then tried a smaller print to test it. After about 20 minutes the same thing happened. Does anyone else have any experience with something like this? I have read several other removing an extruder completely so I thought this should work, but is it possible that the removed extruder has to be tool 1 and not tool 0? My next testing steps will be to take octoprint out of the equation and print directly from SD while I wait for the replacement part.

Thanks,
Jeff

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