Answered R1 will not go down on G28

My R2 had been working great for the past couple of months until today.

I noticed on my new print that the z was not lifting from the first level. I then attempted to do a G28 and the a world not lower . I have checked out the video on autoleveling buti can see that the switches are pressed. Any suggestions? Thanks

 

Closely inspect and compare from one side to the other your Z lead rods, particularly look at the brass nuts on each in relation to the plastic clamp around them and also in relation to the entire x axis. I bet you will find one side is off compared to the other. I had this very same thing happen to me just the other day. Loosen the clamps to free them from the brass nuts. Tiny screw on each clamp. Spin the brass until they are at the same height to each other then re-seat your x axis back down firmly onto the brass on both sides. Slip the clamps back on and tighten them back up around the brass. The same amount of brass should be visible on both sides. Check you didn't loosen the wires for the end stops on each clamp. Re do a bed leveling process a few times. Worked for me.


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Thanks I will try that

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