Retsch DM 200 - Manual (Page 13)

16.11.2006 Retsch GmbH
13
Doc.Nr. GB 98.740.9999
Changing the direction of rotation, re-
placing the milling disks
The milling disks are subject to natural wear after use over
a long period.
However, before they need to be replaced by new ones the
direction of rotation of the motor can be changed so that
the opposite side of the gear teeth can be used. By this
means the service life of the milling disks can be extended.
Changing the direction of rotation:
By reversing the phases of the mains supply the direction of
rotation of the motor can be changed. Since this necessi-
tates intervention in the electrical connecting line of the
DM200 the change in direction of rotation should be carried
out only by a qualified electrician.
However, it is possible to install a direction of rotation
change-over switch when connecting up to the mains supply
for the first time. It is then no longer necessary for an elec-
trician to intervene when the the direction of rotation has to
be changed again.
Replacing the milling disk in the door:
Disconnect the mains plug
Remove the collecting vessel
Keep the door closed
Slightly unscrew the hexagon bolts or hexagon nuts with
an open-jawed spanner
Open the door
Keep a firm hold on the milling disk while unscrewing
both hexagon bolts with washers
Remove the milling disk
Clean the mounting of the milling disk in the door
Insert a new milling disk so that its contact surface is
level
Screw in the hexagon bolts again – for zirconium oxide
hexagon nuts are used