Half the group are laughing, thinking I didn't switch the rotary stop on. But I did, honest.
Anyway, I switch it to chisel mode, and chisel away at the wall. This works well on the whole, but the chuck slowly rotates, so the flat plane of the chisel does not stay where I want it to. It does not rotate unprovoked, but only when a torque is applied, e.g. when chiselling against a bump.
Is this meant to happen? Or is it broken? Or am I doing something wrong? Or something else?
Thanks! David P.