I had less than 24 hours of joy after fixing the jamming issue I had all week... and it came back.
I printed a pretty complex object with PLA without jamming, then changed to ABS filament (maybe I shouldn't have?) and printed another fairly complex object without any issue. Then I switched back to PLA (maybe I really really should never have?) and start having the same jamming issue.
I did everything I tried before, including disassembling the hot end and cleaning inside - there were no debris or clogged up plastic or foreign objects - the passage was clean as far as I could tell, but I still scraped inside with toothpicks, just like what I did when I fixed the last jamming issue.
Well, the difference is that even after disassembled hot end clean up, it is still jammed.
What's interesting is, however, that extrusion works fine with both PLA and ABS when I send extrusion command from Pronterface, with various distances from 1mm to 10mm and various speed ranging from 10 mm/min to 60 mm/min. It's only when I start printing, I no longer see any extrusion or very little of it, and I can hear hobbed bolt eating into the filament (I heard it so many times now, I can recognize hobbed bolt chewing the filament by the sound :().
This jamming issue is like a herniated disc or ACL injury. Once you got it, it keeps coming back. I never had any jamming issue until last week, but all of sudden, once I had one it keeps coming back. Is my J Head ruined forever? I actually have another J Head (with smaller nozzle size)... should I just try that one, and use it until it starts having a jam issue? :(
I printed a pretty complex object with PLA without jamming, then changed to ABS filament (maybe I shouldn't have?) and printed another fairly complex object without any issue. Then I switched back to PLA (maybe I really really should never have?) and start having the same jamming issue.
I did everything I tried before, including disassembling the hot end and cleaning inside - there were no debris or clogged up plastic or foreign objects - the passage was clean as far as I could tell, but I still scraped inside with toothpicks, just like what I did when I fixed the last jamming issue.
Well, the difference is that even after disassembled hot end clean up, it is still jammed.
What's interesting is, however, that extrusion works fine with both PLA and ABS when I send extrusion command from Pronterface, with various distances from 1mm to 10mm and various speed ranging from 10 mm/min to 60 mm/min. It's only when I start printing, I no longer see any extrusion or very little of it, and I can hear hobbed bolt eating into the filament (I heard it so many times now, I can recognize hobbed bolt chewing the filament by the sound :().
This jamming issue is like a herniated disc or ACL injury. Once you got it, it keeps coming back. I never had any jamming issue until last week, but all of sudden, once I had one it keeps coming back. Is my J Head ruined forever? I actually have another J Head (with smaller nozzle size)... should I just try that one, and use it until it starts having a jam issue? :(