After 136 hours of use I have extrusion issue on my H2D and can not find out why. I mean I’ve unmounted the entire extruder and found not clog anywhere. I made manual tests of the extruder and at some point the dual extruder gear just won’t turn for unknown reasons as far as I can tell.
Thought at one point I noticed that the black gear from the dual extruder gears way turning but not the steel one where the filament is. And because I don’t see clogs, I’ve just unmounted the extruder again and noticed that steel gears can be manually turned with the black one moving. I was even able to unmount it. It does not seem legit to me to be able to do so, but I am no specialist. What do you think ?
For what I understand, those 2 should be fixed to each other. You can find an image in the replacement part section of the shop. This is clearly a component failure.
I would contact support.
The thing is, based on the design I hardly see how it won’t happen to any other H2D. I don’t even see how it would be supposed to be fixed. Seems like it’s just supposed to be push forced inside hoping it stays in place in the long term despite the constraints it has to endure.
I’ve received confirmation yesterday they are sending me a new one under warrantly. However I have to say it makes me kind of lack in confidence about this specific part of the printer. It wouldn’t have cost much to add some milling to the shaft to ensure the steel gear can’t be loose.
I just setup my H2D printer, and spent the last 2 hours going through various issues, but was able to work through them all.
Now, the issue I have is that I can’t load filament into the toolhead at all. The AMS was able to feed the filament (SUNLU PLA+) into the H2D, but as soon as it hit the feed for the extruder, I hear it hit, then automatically retract.
I tried this with the external spool, and I would feed it in until I couldn’t any more (per the instructions) but then it never gets into the H2D (gets stuck at that yellow thingy… for the record, I’m going from a A1 Mini and realized how awesome 3D printing is and asked for this for Fathers Day, so here we are)
So in short, is this the same issue that you were having?
I have not been able to load any filament or print anything as of yet… just right out of the box and first print attempt.
Make sure the tubes are fully inserted into the rear buffer. You should be able to see them through the small square hole inside the printer on the rear buffer. They can be a bit tricky sometimes they need to be pushed in farther than expected.
As an alternative, you can bypass the rear buffer and load filament directly into the extruder. This will help confirm that the extruder is functioning properly.
It does look like the same issue, filaments where feeding. You may want to check if the filament goes to the extruder gear by having a look at the gears after removing the tool head front cover and doing a manual feeding as explained in the unclogging procedure here : H2D Hotend Unclogging Procedure | Bambu Lab Wiki
If the right nozzle is clear (not plugged or restricted), check whether the right extruder arm is ok. A loose arm can cause misalignment with the extruder gear during extrusion look at both arms to compare.
Open a support ticket one user reported needing a full extruder unit replacement to resolve the overload problem.
