pull the top off - you should be able to see if the worm screw is working when you turn the knob (turn off the power first...)
I have also found that 1/2 a turn on the knob is very little, and for different roasts i have to make several turns to dial in the grind - I think it is just very fine grained adjustment
pull the top off - you should be able to see if the worm screw is working when you turn the knob (turn off the power first...)
I have also found that 1/2 a turn on the knob is very little, and for different roasts i have to make several turns to dial in the grind - I think it is just very fine grained adjustment