Idler pulley gunk cleaning tool
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Little helper to scrape gunk of toothless idler pulleys.
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A bunch of gunk accumulated on my K1C toothless idler pulleys, made these to scrape it off. Disregard the print quality in the photos, the K1C is on its apparently already on its last legs after only 6 months.
Print settings
Pick one or both single and multi cutout variants. Pick single for more durability, if you have a hard time with the angle to reach the pulleys or the belts, try the multi variant.
material: PLA. I suppose any material that is not too brittle or flexible would do.
wall: 3
infill: 15%
The circular cutout has a 12mm diameter which should be a few tenths smaller than the idler pullet diameter to pressure is mostly applied to the edges. For pulleys with larger diameters you might want to scale on the X+Y axis to fit your specific pulley size.
Height is 5 mm, whereas belts are typically 6mm or 9mm. So this allows for some vertical movement for 6mm belt pulleys. You might want to scale on the Z axis only for 9mm belt pulleys.
Usage
Do not use while printing, I'd go as far as just turning of the printer for this just to be safe.
Place the circular cutout on the toothless idler pulley.
Move the print head on the X/Y and apply pressure to the tool.
Optionally add some cloth or paper towel with some cleaning product (check what is safe to use for your belts).