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HELP !!! Proxxon MF 70 Mill

Joined
Aug 21, 2019
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790
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A few days ago, I noticed some 1mm play (vertically) between the Main Housing and Z Pillar.
? diagnosis and treatment I can try a home.
I use it daily, and don't want to send it for repair.
 
PS - if the adjustment screw are (too?) tight, this results in play in the handwheel.
This is because the plastic cap (18) that holds the wheel is dented. There is backlash on that axle anyway.
Another approvment is this
 
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