Knurled wheel slippage problem

[tanveer77 2]

There was an issue of nozzle clogging which was easily sorted out. But the main problem which he is facing is with the Knurled Wheel in the Feeder Driver. Almost a month back when he realized that there is such problem with his machine he immediately bought a spare of Knurled Wheel from us. Today I observed that even the new spare of Knurled Wheel is not working out with the machine Gear Shaft. Actually at the time of pushing or pulling the filament the Knurled Wheel is coming out of Gear Shaft. Even after tightening the Wheel Screw it is not helping.

[Nicolinux 288]

I can't imagine how the knurled wheel can slip on the gear shaft. The shaft has a flat part where the wheel screw should be tightened against. Did you replace both, the wheel screw and the knurled wheel?

You could also draw a mark on the knurled wheel and geared shaft to see if the knurled wheel really moves - like this:

[pm_dude 27]

That happened to me once. Even though the screw seemed tighten up it wasnt. It is possible that the wheel screw is not properly inserted in the threads giving you the feeling of being tightened.

I'm not saying it's be the case here but if the screw is tight but the knurled wheel is still loose then the screw is just not touching the shaft with enough pressure.

[Nicolinux 288]

That's true, but the shaft has a flattened area where the screw digs into. For the knurled mantle to move, the screw has to be very very loose.

[pm_dude 27]

The issue described here is not that the knurled mantle move around the shaft but simply slide out of it. The screw needs to be just a little loose to allow a slide in and out of the shaft since it require no rotation what so ever.