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test report, testing different feeder wheel grip patterns

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Hi everybody,

Several people asked me to publish research reports on the forum. Up until now I shared these reports through email. The advantage of this was that I had direct contact with the people who would read it. This meant that I received elaborate comments from almost all of them. Furthermore it was easy to keep track of who had read the report, so in case there would be a mistake in the report I could contact all of them personally.

However, because people requested it, I will experiment with putting the reports online. Attached to this post is a report I wrote earlier about tests with different grip patterns on feeder wheels.





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Interesting report. In my year-long experience with a TrinityLabs hobbed wheel, it did occasionally clog as a result of some other issue, but when it didn't unclog on its own, it was quite easy to clean out (assuming easy access).

I've just started using a MK8 hobbed wheel on my UM2, and so far it seems to get a better grip on the filament with fewer skips than the original knurled wheel. Having smaller effective diameter, it should give a bit better extrusion resolution - I'm still calibrating, but using e-steps around 340 for now.


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Awesome Bas. In my tests:


The UM2 feeder motor slips somewhere around 4.5 to 5.7kg or (multiplying by 9.81 m/s/s) 44 to 56 Newtons when using the default current (I believe 1.25A limited) although the motor can exert more force when spinning faster before the current limiting feature allows it to slip back.


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