Slotted idler
thingiverse
When filament fails to engage with the drive gear teeth, it can often be solved by using an idler with a specially designed slot that securely positions it. To ensure this happens seamlessly, swap out the original 608 bearings for ones measuring smaller in width yet identical in diameter to 688 bearings.
Download Model from thingiverse
With this file you will be able to print Slotted idler with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Slotted idler.