Retsch BB 300 - Manual (Page 14)

07/02/2012 Retsch GmbH 14
Starting the BB 300
The BB 300 may only be started with the crusher chamber empty.
Process material fed into the crusher chamber or feed hopper before
starting leads to blockages, and mechanical components may be
damaged.
Fig.4
The ON/OFF switch is located on the front right of the BB 300.
Fig.4
Turn the switch to the ON position.
The motor is started, and the moving crusher arm starts to move.
The crushing process can only be started when the door is closed and
locked.
When the door is opened, a limit switch prevents the BB 300 from
starting.
Stopping the BB 300
The ON/OFF and motor protection switch is located on the front
right of the BB 300. Fig.2
Turn the switch to the OFF position.
The motor is disconnected from the power supply and the moving
crusher arm stops.
Only stop the BB 300 when there is no further process material in
the crusher chamber.
Mechanical components can be damaged if there is blockage.
Setting the gap width
Fig.5
Fig.5
Start the BB 300 (under no load).
Release lock nut N (anti-clockwise).
Turning spindle O clockwise reduces the gap.
Turning spindle O anti-clockwise increases the gap.
Pointer L roughly shows the gap on scale M, pitch 2.5 mm.
Re-tighten lock nut N (clockwise)
Adjusting the zero position of the gap width indicator
Fig.5
Start the BB 300 (under no load).
Release lock nut N (anti-clockwise).
Carefully turn spindle O inwards (clockwise) until the two crusher
arms just audibly meet.
Release the hexagon or knurled head screws S1 with an 8 mm AF
spanner.
Slide the “0” position on scale M to the zero position of pointer L.
Re-tighten the hexagon or knurled head screws S1.