Ultimaker Extruder Drive Upgrade
by Bertho, published
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There is no space for the locking nut inside the main plate, so be prepared to drill pits for it or file down the protruding edges of the nut.
I do not know what is different or wrong with your setup since the original works fine and so does the production version. Make sure the white locking lever is properly closed or it will not work.
i have the official parts from Ultimaker shop.
Doesnt work with my Ultimaker...
absolutely ZERO improvement on my side...
not a single one of my filaments can be extruded with this "upgrade"... not even by hand.
the filament has too much play sideways.. also i think the slits for the pressure-movement are too short. the bearing is not realy pressed against the filament but against the ends of its slits.
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For detailed instructions see:
The bearing can be found here for $7.41:
It is a Dynaroll SMR128ZZ A5
The spring OD is 7.72mm, has 8 turns of 1.14mm wire, and a free length of 20.9mm. Sorry, I do not have any part number since it came from my big junk box...
Since I needed to measure the spring used for the Ultimaker Upgrade I documented the steps both for a high accuracy measurement procedure and a simplified one.
Note, the spring for the upgrade is not critical. There is a tremendous adjustment range.
I added a section on Extruder Drive Force Measurements:
The long screw is 50mm.
The shaft screw needs to be 20mm since the yoke is 18mm.
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