I've been using pronterface for a while without problems. I decided that I would try to script running a print, but haven't succeeded yet. I'm doing this because I have a heated build platform that is externally powered. My script will A)Turn on platform Wait 10 minutes C)Print It looks like printcore.py is the correct command-line utility to use. Has anybody used this successfully? Here is an eby JohnnyDude - General
Hmm. Well. It seems the mystery may be solved. I printed for a good 10 hours yesterday. Even without a fan on the hot end (because it was cooling my build platform too much, I'll have to readjust). I'm printing again now. The new "natural" ABS from Ultimachine seems to be the key. The prints are a little less rough as well. I think the black ABS I had used previously was the issue. Thank you verby JohnnyDude - Reprappers
I dissolved the hot end's abs in acetone as well. There were a lot of black flakes that did not dissolve. I don't know if all the plastic should dissolve just sitting there, however. And, in my situation I think the temperature may be burning the abs. I could try this experiment again with some abs directly from the source. Things I have done since the failures: Added a fan mount to the X-axisby JohnnyDude - Reprappers
This is all very good to know, thank you for the help! I will work on eliminating possible thermistor wire shorts, although all I have that would survive the high temperatures is kapton tape. I'd rather not use cement given how often I have been cleaning out the tip and I rather like how thorough the blow torch method works. I think I will order more of that tubing stuff since it did the job welby JohnnyDude - Reprappers
Okay, I've ordered some plain filament from Ultimachine. I will see if that helps. It is useful to know that some filament from MakerFarm reportedly isn't problematic. By the way I neglected to mention I have a .35mm tip with my J-head. Sounds like my ~20 degrees C temperature fluctuation is not normal. I want to resolve this. The resistor is a little loose and I can try some foil. Could someonby JohnnyDude - Reprappers
Well, I appreciate the response despite my silly tantrum and apparent post in the wrong area. My rage has subsided a bit. I posted here because I saw another post about a similar J-head problem, but I can see that I posted in the wrong area. It is a 5lb donut of black ABS from MakerFarm (no spool). I think your idea about the black ABS may be spot on. This holds my largest suspicion as well. Doby JohnnyDude - Reprappers
I am angry and I am going crazy. I have printed for about 4 hours a day until my printer jams. I have had to clean out the nozzle every day for the past 10 days. I have started with an acetone bath and a guitar string, but have used a blow torch for the past 2 days. It is become an infuriating inconvenience and I'm spending more time cleaning out the hot end than actually printing. I've disassembby JohnnyDude - Reprappers
I'll buy itby JohnnyDude - Plastic RepRap Parts for Sale