Gear bearing filament roller for CraftBot by ckupcu

Last crawled date: 3 years ago

I was never 100% happy with CraftBot's original thin filament holder, therefore I designed a simple, yet elegant gear bearings for smoother rotation.
Most of the filament rolls have 56mm hole diameter and 75/90mm width, so I target them.
I started with customizing Emmett's pre-assembled Gear Bearing design using the following options:
tol = 0.2
number_of_teeth_on_planets = 5
number_of_planets = 5
w = 16.5
nTwist = 1
P = 45
T = 10
D = 56
approximate_number_of_teeth_on_sun = 9
Unfortunately, there is no option to change center hexagon to a circle in the customizer. So, I added a hallow cylinder in the middle with 16.4mm diameter to convert it to a circle. I also added 2.5mm wide ring on one side with 60mm diameter. This ring makes 2mm extension on the periphery of the gear bearing, will serve as a support on both sides of the filament roll. CraftBot's original filament holder shaft increased to 16mm. Finally, a 5mm wide O-ring added as a stopper behind the filament roll to avoid friction to the CraftBot's side wall.
Slicer settings: (CraftWare 1.13 beta #25088)
Basic:
EW/LH: 0.4mm / 0.2mm (1st LH 0.3mm)
Perimeter W/S: 90% / 60%
Infill Density/Speed: 30% / 100%
Advanced:
DS: 50mm/s
TS: 70mm/s
WS: 20mm/s
R/PS: 80mm/s
Drawing order: [loops -> perims] -> [fills]
Foundation:
1st LH: 0.3mm
Extr. adj.: 65%
Speed: 20mm/s
Temperature:
HT: 215C
BT: 60C
GCode:
Acceleration (postprocess GCode) enabled
Supports: not needed
Print time: <10h
Filamet: <15m