Honestly though I think when winter hits your problem will disappear.
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I have the same problems on my Replicator 2X. The reason can be many things:
- bad leveling
- extruder gear needs to be cleaned
- hot end temperature to low or to high
- filament quality → amount of non-plastic particles in the filament or just dust on the filament tend to burn off and that lead to a clogging nozzle or at least giving the extruder a hard time to push the filament through the nozzle until the point it’s to hard and the extruder gear is milling into the filament.
- friction of filament in the PTFE tube. Some filaments have higher friction than others. It’s also material dependend. Some PLA doesn’t move very well through the tube. ABS instead slips easily. Maybe you give it a try without the tube.
- friction of filament spool on the bracket. I’ve replaced the original spool bracket with a design very similar to this: 30 x 100 Spool Holder for Replicator 2 by whpthomas - Thingiverse 83
- Retraction. Yes, retraction! For some reasons the chances of getting a clogged nozzle raise when using retraction. I’ve disabled retraction for some filaments and was able to print successfully
- The spring for the pushing ball bearing in the extruder is too weak. I’ve replaced it with a stronger one in the left extruder of my Replicator 2X. Granted, I haven’t tested that extruder yet, but I have another printer with a Mk8 china extruder pushing its teeth as deep into the filament as the my left extruder now does and with the Mk8 I didn’t had that issue for 2 years now. And that printer is running 80% of 24/7.
have you tried tightening the feeder ?
Have you updated the software . If so take the nozzle off and hit it with a blow torch to make sure it’s clean or buy new tips . If that doesn’t work . Take it apart and clear the clog . The thermo barrier or nozzle . Or just buy the new extruder . It’s 129 I think supposed to be better don’t know .
Con you post a picture of the extruder with the fans and heatsink removed?
You might need a delrin plunger upgrade.
how long have you had the printer ?
My Replicator 2X is 7 month old. It is a replacement by Makerbot for the broken one I had previously. Both printers have the same Mk7 extruder with the spring lever.
when was the last time you cleaned the feeder ? sometimes the filament can grind and leave residue in the teeth. This caused the motor to slip on the filament and grind your filament.
This list is pretty complete. The only thing I would add is to check the spool to check if the filament is not tangled. When you remove a spool, sometimes you let go of the tip of the filament and it unwinds a bit. It happened to me once that I just grabbed the tip and pulled it to tighten the loose loops around the spool. As it turns out, what I did was basically tied a knot. When I tried printing again, it printed fine until the knot tightened to the point that the spool would not turn any more.
Also, when the spool is on the last 10-15%, it seems it is harder for the extruder to pull the filament. Lubrication on the spool’s bracket helps. A dry lubricant, like graphite works nicely.
Hi Nicolas
What material are you using? Always happen to the same height and with the same piece?
Once I was printing a piece in abs and at certain height the impression was suspended; The strange thing is that it always happened at the same height.
After trying everything, I realized that the piece had a thin wall at that point and due to the machine trying to make it, it performed constantly retractions that ending up on a bearing eating the filament.
Try several things:
1. Suspend retractions. The piece might look terrible but you will try if that is the problem.
2. slow the print speed or increase the minimum duration of the layer, in the Makerbot software
3.If it is a mechanical problem, adjust the bearing pressure
4. In this link Print Quality Guide | Simplify3D Software 129, check the “Stops Extruding Mid Print” information, you might find it usefull
Does the extruder clogs to the problem you need to disassemble?
I have addressed most of those issues by:
* Lower extrussion temperature to 210.
* Declare a wider filament on configuration (as in 1.85mm instead of 1.75mm). (Some filament manufacturers don’t have consistent density).
* Dry filament (it expands when it gets wet).