Posted by sylvia williams on Tuesday, March 17 2009
the knob has two holes get an allen wrench to tighten you may have to take off knob to align knob with the speed on the shaft we had the same trouble and did this it is still working
If you need your Diversified Products unit tested or repaired
then give us a call at 1-336-969-0110.
We give fair estimates and offer a year warranty.
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Industrial Electronic Recycling
931-E S. Main St #204
Kernersville, NC 27284