Need help extruder jamming December 10, 2015 07:22PM |
Registered: 8 years ago Posts: 7 |
Re: Need help extruder jamming December 10, 2015 10:38PM |
Registered: 8 years ago Posts: 28 |
Re: Need help extruder jamming December 11, 2015 03:14AM |
Registered: 9 years ago Posts: 1,159 |
Quote
voi9viper
is it jamming in the extruder, or the hot end? Do you have a fan cooling the heatsink finned part of the hot end? The top part, called the cold end, needs to be cooled so the plastic only melts in the aluminum block at the bottom. If heat is climbing up into the finned part you can get jams like you describe. You said you have several fans, but not what they cool. What material are you printing? What temp? PLA will jam if it gets too hot. For me PLA will jam if I look at it too long Have you tried a cold pull to clean out the nozzel? Overheated PLA won't melt again correctly and can jam things up, too. You need a cooling fan that blows on the part right at the nozzel tip for PLA. ABS can be printed without the lower fan most of the time, unless the part is complicated with lots of bridges, etc. Hmm, how do you clear a jam?
Anonymous User
Re: Need help extruder jamming December 11, 2015 03:51AM |
Re: Need help extruder jamming December 11, 2015 05:47AM |
Registered: 9 years ago Posts: 346 |
Re: Need help extruder jamming December 11, 2015 08:19AM |
Registered: 8 years ago Posts: 59 |
Re: Need help extruder jamming December 11, 2015 01:39PM |
Registered: 8 years ago Posts: 7 |
Re: Need help extruder jamming December 11, 2015 05:01PM |
Registered: 8 years ago Posts: 7 |
Re: Need help extruder jamming December 12, 2015 05:07AM |
Registered: 8 years ago Posts: 28 |
Re: Need help extruder jamming December 12, 2015 05:11AM |
Registered: 10 years ago Posts: 14,672 |
Quote
voi9viper
I had a TAZ 5 and never got PLA to print right. ABS was so easy I stuck with it. Now I'm trying it again with my new Kossel. I hope it works this time. I think the upper end cooling is not perfect, and when the extrusion rate slows plastic melts in the cold end , and jams. I have no idea how to fix that.
Re: Need help extruder jamming December 12, 2015 08:00PM |
Registered: 8 years ago Posts: 7 |
Re: Need help extruder jamming December 13, 2015 03:41AM |
Registered: 10 years ago Posts: 14,672 |
Quote
miked63017
So I think it was a combination of of the driver current being too high and too many steps per mm on the extrude. Though I have no idea how this would have changed from the weeks of good printing it did?
Either way once I turned down the pot on the extruder driver the jams were gone, it did click alot so I turned down the steps per mm to 90.5 from 106.5 and things seem a lot better now. I have another extruder that looks like the same exact model and I always run it at 90.5, but the firmware recommendations I found for this printer kit suggested 106.5.
Anyway, thanks for the quick responses, hopefully somebody else stumbles across this and gets some ideas of things to look at when their extruder is jamming up frequently.
Re: Need help extruder jamming December 13, 2015 01:07PM |
Registered: 9 years ago Posts: 346 |
Quote
miked63017
So I think it was a combination of of the driver current being too high and too many steps per mm on the extrude. Though I have no idea how this would have changed from the weeks of good printing it did?
Either way once I turned down the pot on the extruder driver the jams were gone, it did click alot so I turned down the steps per mm to 90.5 from 106.5 and things seem a lot better now. I have another extruder that looks like the same exact model and I always run it at 90.5, but the firmware recommendations I found for this printer kit suggested 106.5.
Anyway, thanks for the quick responses, hopefully somebody else stumbles across this and gets some ideas of things to look at when their extruder is jamming up frequently.
Re: Need help extruder jamming December 15, 2015 11:14AM |
Registered: 8 years ago Posts: 3,525 |