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Wisar

Button function of thumbwheel has stopped working!

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Hi, Wisar,

On all UM2/UM2+ series machines the knob front and knob housing are secured to the shaft coming out of the Ulticontroller board using a washer and hex nut. Is your knob housing loose in the frame? If it is, you can raise the bed and you should be able to find a hole in the top half of the knob housing at the back. Hold the knob housing in place a push a screwdriver through it to push your knob front out, and then you can use a pair of pliers to tighten the hex nut or check for debris. There are photos of the process here.

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