Double Independent Roller for Filament Dryer
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Allows both sides of the roller to spin independently of each other to avoid the unspooling of the filament.
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When you have both spools inside the dryer with both filaments sticking out and you start printing from one side, the other one will get unspooled, making a big mess.
This roller will allow one side to spin freely while the other remains still.
In total you'll need
- 6x 608 bearings
How to print
Print the right roller with the outer pin pointing up, with a brim.
The right roller has bridge supports included in the model, so no slicer supports are needed.
Print the left roller vertically, with supports.
Use ABS or better. PETG will melt even if the dryer temperature doesn't go above 50°C.
They sit very close to the heater and the walls around the bearings are thin.
Don't just print the stls, read this first
Since I tightened the clearance for the bearings, I included the Fusion 360 file that has all of them in the parameters list.
You can play with them just in case they are a little too tight for your printer.
You'll want to focus mainly on bearing_outer_clearance and bearing_inner_clearance.
Make sure the bearing fit snugly, but not so much that you have to force them in.
By default, they are set to 0.15mm, which is perfect if your printer can handle it.
You might want to try the new scarf seams in Orca Slicer.
Keep in mind that the inner pin shouldn't be loose at all, otherwise the roller won't sit straight and it will break easily.