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Just an other filament holder to be mounted on top of Prusa/Mendel. Though quite light still can sustain 2.3Kg bobbin. Construction is detachable from the printer and equiped with optional slit for filamnet and bearings in the bobbin axis.
Designed for bobbins with 30-31mm center openings diameter. Bobbin of overall size 132mm wide up to diameter 230mm can be fitted in the holder.
Print 2pcs of holder, 2pcs of bearing encasement and 1pc of filament slit.
Edit 2014-01-13: ABS is recomended as PLA tends to crack when tightened too much around threaded rods. Anyway use caution.
6pcs M3x16 screw
6pcs 3mm washer
6pcs M3 nut
1pc M8 threaded rod 155mm long or M8x150 screw.
2pcs M8 nut (only 1pc if M8x150 screw is used instead of threaded rod)
2pcs 8mm washer
2pcs 8mm bearing
1, Insert M3 nuts in both sides of filament slit and attach it to both sides of the holder with M3x16 screw with washer.
2, Insert M3 nuts into the clamps
3, Install the holder carefully on your Prusa/Mendel by sliding the clamps on the two top threded rods holding the Z-axis step motors. Holder is designed for rod distance 58mm center to center.
4, Tighten the clamps by using M3x16 screews with washers.
5, Insert bearings in to the center wheels.
6, Put threaded rod through bobbin center and insert center wheel from both sides. Put M8 washer from both sides.
7, Slide the bobbin with threaded rod into the holder and fasten with M8 nuts from both sides to keep it in the position.
8, Lead the filament through the slit to extruder.
Filament bobbin holder by thorgal is licensed under the Creative Commons - Attribution - Non-Commercial license.
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