I finally decided it was tme to tune up my Azkoyen M01 grinder today.
Ever since I got it (used, ex-commercial), it has struggled to grind fine enough with some beans, although most are OK.
The grind setting is a simple knob on the front with 19 numbered settings and click stops at each setting.
Took the front off, emptied out 62 grams of coffee from the unused side of the dispenser - my grinder had a modification to dose on demand out the right hand dispenser and v grounds seem to build up in the other chute.
Once clean, I checked the adjustment knob and it has a 2mm Allen grub screw holding it in place. Slackened this and carefully removed the knob. There is a spring loaded plunger behind the knob to provide clear tactile feedback on the adjustment - this engaged with hollows on the rear of the brass collar attached to the knob. The knob acts on a stainless screw that goes directly into the grind chamber
Adjustment is easy, no need to remove the adjuster knob.
slacken the grub screw then simply turn the knob slightly anticlockwise and retighten the grub screw if you want to be able to grind finer.
Mine is now set so the burrs are just beginning to rub at the finest setting.
Road test tomorrow. What used to be the finest setting is now two thirds of the way round, leaving heaps of adjustment available either way.