Rim Model "Scorpion" for 250mm Ardumower Wheel
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Dual-Color rim for Ardumower or other robots using 250mm wheels.
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- Printables
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- RC & Robotics
- Licencja
- Creative Commons — Attribution
This is a robust rim design for heavy outdoor activities (lawn mower). It can be combined with all tires using a 200mm dovetail tire interface DT200.
Main characteristics:
- Dimensions: 200 x 40mm
Mounting: 4 holes for M4 screws, distance: 14mm (Ardumower)
Dual color possible
- Rim and tire are printed separately. So you can use a stiff material (PETG, ASA) for the rim and a soft material (TPU) for the tire.
Printing
To get a satisfying result please first carefully read the instructions below!
Infill
For the rim I recommend honeycomb pattern as this provides a very good stability. Additionally, the screw area, where the rim will be fixed to the axis should be solid 100% in order not to bend by the force of the screws. This is achieved by adding a second model within the rim which can get an individual infill:
- Load the the rim model into Prusa Slicer and set infill settings of the rim to 15% honeycomb (it is easier to set this not in the default print setting but directly in the model settings (see picture below).
- Add the solid infill model part (right click on the model → add part and selecting rim-250mm-solid-plate.stl). The solid infill should automatically appear at the right location at 14mm height World Coordinates. If not you have to lift it manually! In case the solid plate falls down to the bed, it was loaded individually not as part of the rim model.
Set infill settings of the solid plate to 100% infill. The resulting sliced model should then look like this:
Dual Color
If you want to print the rim in 2 colors. Add a color change at the appropriate layers. For 0.3mm DRAFT mode, this should be layer 137 (new color) and 140 (back to old color):
Perimeters
For stability reasons, perimeters should be set enough to cover all the tooth area of the tire interface. This is 6 for the 0.3mm DRAFT settings:
Support
Support is needed only for the center area where the screws are mounted. You will have less work to clean the tire screw holes if you block support, here:
