Why are we using m8x22 ball bearings for the extruders and then putting a 8mm "hobbed bolt" through it that is smaller than 8mm? If you could buy bolts that actualy measure 8mm on the OD this would work fine but most if not all bolts are purposefully made about .25mm smaller on the OD. This leaves a bunch of slop between the bearing and the bolt. Maybe this is not enough slop to cause problems, i dont know. But it surely causes issues when the filament feed direction is reversed doesnt it? Ive built about 3 or 4 printers and each of them seem to have the same problems with the extruder retracting filament and then not laying down enough plastic for a moment when it prints the next line. All of them have used the wades style extruder.
Is this a big enough issue to try and fix or am i chasing the wrong problem?
Is this a big enough issue to try and fix or am i chasing the wrong problem?