mk7 ball bearing extruder drive
by jag, published
I just don't love having that delrin plunger dragging on the filament and I like to be able to quickly release the tension so that you can pull the filament out and replace it easily without having to run the stepper.
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Not really, Â a 608 bearing is half the width of the stepper so, it would need to be a much bigger assembly. Â The mark 5/6 filament feeders could be tweaked for a 608 but they use a different hot end.
Just made this and I love it! Got the bearing from amazon and here's the link if anybody would like.
Its prime eligible so that means 2 day free shipping for whoever has prime!
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Either print out the parts separately or print out one of the plates (with or without the quick release).
Remove the support from the lever (where the bearing goes, it's just two thin walled cylinders)
Remove the support from the underside of the body.
Remove the support from the quick release (two cylinders again)
If you have a 3mm tap, you might as well run it through the holes for the tensioner and the bearing.
Install a 623 (or R2) bearing (3mmx10mmx4mm) in the arm with an 3mm x 10mm countersunk screw
Put the pin for the quick release in the quick release and install the screw (3mm x 20mm)
Snap the lever onto the drive and install the tensioner screw or quick release.
Install the drive the same way you would the normal mk7 block. Tighten the tensioner screw until the stepper misses steps when you hold onto the filament (as opposed to just slipping).
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