Recently replaced several of my V-wheels, as they were quite worn. The problem I encountered afterward is related to the proximity switches and belt tensioning clips, I think… The X- and Y-axis proximity switches suddenly aren’t able to move close enough to the points where detection is triggered. I hadn’t realized it before, but I think the belt tensioning clips are getting in the way. I was able to adjust the proximity sensors as far as they allow, which helped, but now the X-axis is limited just enough that the bit cannot reach the bitsetter point.
The old v-wheels were quite chewed up on the edge, which I believe to be a result of them rubbing over the belt tension clips. Perhaps that also allowed enough clearance for the axes to move far enough in the extremes? I am about 1/2" short because of this.
What should I do? Should I try to grind/modify the wheels with a bit of a edge channel so they roll past the clips? I tried to rotate the clips out of the way slightly, but couldn’t manage enough clearance. Do I just adjust the location of the bitsetter? Feedback appreciated!
Try this, When tightening up the cap screw that holds the tension brackets hold the bracket with a pair of pliers. If you dont hold the brackets square they will twist when tightening up the cap screws due to torque.
So loosen the cap screw slightly, hold the tensioners with a pair of pliers and tighten up the cap screw keeping the tensioners tight and held in place.
Thanks! I did try that last night, but it still was in the way… I also noticed the line the belt makes from the tension clip, through the pulleys and motor, to the other clip; is not very straight. The pulleys and motor track pretty closely to the v-groove but the clips are pulled away a bit more.
I will try again this evening and take a reference pic, perhaps.
I was able to adjust the clips a bit more to avoid contact with the wheels.
Is there a way to adjust the sensitivity of the proximity switches? Like, the minimum distance for them to detect the frame? I am still baffled because it seems I have had to adjust and scoot them all closer, and I don’t know why.
There is no sensitivity adjustment. It is only the proximity to the metal frame that triggers them. That proximity is built into them from whoever makes the switch.
I think the situation is fixed, though! With another go at adjusting those clips to have a bit more clearance, and I filed down the edge of one of the wheels just slightly to help with clearance — sensors are back where they were and have the full range of movement.
