Improved FolgerTech Kossel Bottom Corner (Motor Mount)

thingiverse

The standard extrusions proved too bulky for the t-nuts to securely fasten the rods, even when tightened so rigidly that the plastic began to fissure. Most of them could be easily shifted by hand! They were also made from PLA, which melted under the heat generated by the motors. (Examine the image featuring the black component) I simply thinned out the area where the t-nuts are mounted, allowing for more space to clamp securely, and I printed my replacement parts in ABS, which would be more resistant to heat. When assembling, I used longer screws to secure the motors, with washers on top and cork gaskets covering the stepper motors. This provides insulation from the motor's warmth and reduces noise as well. Some may argue that I was overloading my motors with too high a current, which could be true; however, they skipped at any lower setting. The provided pulleys were 36T in size, requiring more torque to function properly. When I switched to my newly designed corners printed on my own, I also replaced the pulleys with 20T ones and reduced the current until the motors no longer slipped when paired with the 20T pulleys. This adjustment also yielded finer resolution.