derek-bosch

there is no visible air gap on between the bowden tube and the teflon connector... I will get pictures later this evening

I will get a photo this evening. As far as un-jamming it, usually I heat the unit to at least 90c, then pull the filament from near the spool (disabling the feeder wheel). if that doesn't work, I end up removing the four long screws, pulling the nozzle/aluminum block off the teflon coupler, then push filament through the tube and cut off the plug that has formed... Any advice in cutting the bowden tube? just a razor blade? or something more precise? I will double check if I need a new tube-holder clip. -Derek

alas, running at 220 with no retraction still jammed after the first couple layers. extrusion looks great up until it jams.

I'm running at 210 for 50mm/sec .1mm layers not a lot of retractions, maybe 10 total per layer. I need to double-check my spring tension when I get home.

pretty sure it is the correct direction - the taped end is at the extrude end, the non-taped end goes into the teflon connector

I reduced the temperature to 200C and reduced the retraction to 2mm, and it still jammed. I will double check the filament diameter, but when I did so earlier, I found no sign of bumps or variation. I will triple check the bowden tube -> teflon coupler connection. I had done as dim3nsioneer suggested not tightening the long screws until the bowden is nice and tight. What is the remedy if the clip holder DOESN'T hold the tube nicely? I will also try increasing the temperature (to 220) to see if that makes any difference

I purchased a used UMO about 4 months ago. Everything was going great, printing solidly without issues for a couple months. Then I got my first filament jam. I unblocked it (using the Atomic method, cleaned the nozzle, etc). Since then, I've had very inconsistent results. Sometimes it prints for 2-3 days without issue, but this past weekend it didn't last an hour. I'm using Gizmodorks 3mm filament (transparent blue), but I've also seen the issue w/ JET PLA orange. printing at 210c. using the most recent Cura (non-expert mode) normal print. the design I'm printing is very simple triangular bars - 5 of them lying parallel. the plugs are right at the white teflon connector/ bowden tube... the filament gets ground down at the extrude wheel. my experiments to try will be turning off retraction, as well as printing at a slightly lower temperature (200?) I've taken apart the hot-end, cleaned out the white teflon connector, the PEEK, nozzle, etc. Bowden tube is sitting flush in the white connector, and everything is nice and tight (at temperature). Any other suggestions? This has been very frustrating...

thanks, Sander! I hope they pay you - you're the only one that seems to be listening!

trying to reach customer support AGAIN on this issue. They closed the ticket cancellng my order # 1542813, but I still have yet to receive my money back, 3 weeks after canceling the order.

thank you, Sander!

ticketID - YFI-800-95799

I've tried to cancel a recently placed order, both by filing a ticket and e-mailing support@ultimaker.com. No response from either inquiry. order # 1542813 in case that helps...