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Original post by: Peter Cunningham ,


I’ve had this happen more then 10 times in the last two weeks. I keep getting an Error 121 because the filament is wrapped around the buffer (never for a clogged path). It always happens in the beginning of the print. Before this happens, the buffer switch is usually actuated 1 or 2 times during the print and works fine as more filament is advanced. Then the buffer switch will be triggered and no more filament is advanced and the error is triggered. I’m not printing fast and it’s not happening during a color change. What is the solution to fix this? I’m so frustrated and have wasted so much filament. I’ve tried everything. re-slicing, adjusting print speeds, resetting power on everything. Nothing works.



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