What solutions are you using for your filament spool?this is what the failure looks like
Shawn
been trying to print and get the correct height for the print surface. printed the demo vase but it was way to stuck to the surface to remove. adjusted the z- height and now it seems to be having tension issues and taking chunks out of the filament and not feeding during a print job. Does anyone have suggestions?
That definitely looks like it’s being shredded by the feed mechanism. Is it extruding anything at all? If not, you may have a clogged nozzle (about which you will find various advice strewn all over the board).
Skateboard bearings are one method of getting spools to rotate freely (the inside should just barely fit over the built-in filament holder on the Snapmaker2). I actually printed this bearing: 608 bearing (parametric, roller) , which works fairly well but was a pain to finish and assemble, and am using it together with an alternative spool holder.
I printed these to reduce how much resistance there was on the filament, to great success:
The bearings were usable right off the plate, and the threads on the spool holder took working in before it would thread together. Print the bearings with a sacrificial raft, first print ripped itself apart pulling it off the bed.
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Here’s my spool support, works for the Snapmaker supplied spool with a giant hub opening. Only requires a couple straight metal rods (coathanger wire would work).
Something else to check: if you have a micrometer measure your filament diameter. If its out of spec too large it could also fail to get pushed thru.
But you’ve got all the usual advice here. Improve the filament feed by reducing backward friction (guide, spool roller), check nozzle blockage, check temps (too low and it can’t extrude - might check the temp sensor is inserted firmly and add a little thermal paste to its hole, make sure it’s reading right).
Filament being torn up like that doesn’t look like extrusion calibration (steps) are the issue at all…
BRUH lmao.
Also, I like the idea of it - nice and simple
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Yeah, I was kind of wondering if I’d get slammed by Thingiverse for that one. So far not. 
I use this for ‘big opening’ spools and more of just the bearing-threaded-directly-on-the-rod approach for much smaller spool openings.
One downside with this arrangement is I just bought some budget filament (e.g. Amazon, e.g. spotty random 5-to-7-letter-company names from whoknowswhom) and at least one of the filament spools I got has a nice big opening that supports my design, but actually is just nicely blended (rounded) from the inner surface to the spool sides. No lip at all! Never seen anything like that before. So this design won’t necessarily prevent the spool from ‘walking off’ gradually, without some extra rails. But extra rails will also add friction right back in.
Rails with bearings…that’s quickly departing the original vision isn’t it.
it starts off working well and then stops. I made sure that the filament has no tension, but every print ends in the same way within 10 min.
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thanks for the things to help with the filament and as soon as I can print I will try some of them but right now I can even print a washer
Well we’re getting somewhere. Thanks for the info that there’s no tension on the filament, that sure was a red herring wasn’t it.
My next thought is get the hot end up to temp, open up the front latch, and manually push filament through the hot end. It should be pretty effortless, if a bit slow. If you can’t push filament through just with moderate pressure (like maybe 5 lbs of force) then there’s probably a clog or it’s not getting up to temp.
Any chance you can verify it’s getting to the correct temp? It looks like the cartridge is only heating it to like 170C or something far shy of 200C.
Another thought I have, if you have a multimeter capable of resistance, you could verify the thermistor is in the ballpark - at room temp I believe it should be ~10k or ~100k depending on the model. If it’s way off that it could be defective.