At the end of the TDA auger is placed a build-inn scratcher.

The scratcher works with spring tines to take the material out of the auger, breaking it apart and ripping out lumps of straw, thus ensuring that all material are delivered loose and fluwy into the stone trap. The scratcher is protected by a amp watch against overload: whenever the scratcher is used more than 90% (adjustable) for longer time than 0,5 sec, Then stops the two TDA auger, until the load again has been lower for longer than 1,5 sec (adjustable).