Retsch RM 200 - Manual (Page 20)

11/6/2012 20  Retsch GmbH 0002
Fig.9
• See also below: "control the scraper adjustment"
If the scraper is not completely touching the bottom
of the mortar and the mortar inner wall (dotted line
in Fig.8), it must be adjusted again:
• Loosen the screw Y again.
• Move the scraper.
• Tighten the screw.
• Check again, visually or with sample material if the
scraper is applied accurate on the mortar.
Adjusting the contact pressure
Fig.10
The required contact pressure of the scraper X must
be determined empirically, depending on the
material to be milled and the required degree of
fineness.
Increasing the contact pressure: Fig.10
• Turn the scraper adjusting knob K anticlockwise
Reducing the contact pressure:
• Turn the scraper adjusting knob K clockwise
If the scraper pressure is set too high this causes
rapid wear of the scraper and contamination of the
material to be milled through the scraper material.
If the scraper pressure is set too high this increases
the motor load and can cause triggering of the
overload protection switch on the rear side of the
machine.