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Maintenance And Repair 7-3
Replacing the Knife (only by authorized personnel)
RESPECT THE RULES (see par. 7-2)
1 Withdraw the grinding unit by turning knob A clockwise
2 Remove feed table PEM (fig. 1)
3 Open upper cover plates C1 and front cover plates C2, remove central cover plate
C3 and guide plate guard LCP (fig. 1)
4 Disable the safety microswitches by means of key switch SA1 (par. 6-2). Turn the
key. Start the machine.
PAY UTMOST ATTENTION TO THE MOVING COMPONENTS
5 Make the knife dull by repeatedly pushing device TF (fig. 1) against the cutting
edge. Stop the machine.
6 Set approx. 6 mm splitting thickness
ENABLE THE SAFETY MICROSWITCHES BY MEANS OF KEY SWITCH
(TURN AND REMOVE THE KEY) AND CUT THE POWER SUPPLY (MAIN
SWITCH QS1 (FIG. 2) IN "OFF" POSITION)
7 Move back wedge CUS of the upper knife back guides and lock them in position
by means of knobs P4 (fig. 1)
8 Remove the ball pins AG (fig. beside)
9 Raise upper guide plate PAS (fig. 1)
10 Open upper knife guard PLM3 (fig. 1)
11 Open upper and lower felt plates FPL (fig. 1)
12 Open grinding stone belt guard PCM by unscrewing knob P2 (fig. 1)
13 Open grinding stone guard PM (fig. 1)
14 Open the lower guide roller by releasing spring MM (fig. 1)
15 Remove the grinding unit belt
16 Space the grinding stones by turning knob A (fig. beside) clockwise
17 Disactivate the lower knife back guide by raising counterweight D with knob H
and lock with knob L (fig. beside)
18 Remove LH lower guide GIS (fig. 1)
19 Slacken the knife by means of handwheel G (fig. 1) and remove the knife
20 CAREFULLY CLEAN THE EMERY DUST CHAMBERS, THE GUIDES, THE
FELTS, THE WHEELS, THE SCRAP FILTER AND THE EMERY DUST FILTER
21 Put on the new knife; its back shall contact the wheel rim
22 Tension the knife by turning handwheel G (fig. 1) counterclockwise
23 Remount all removed parts in reverse order
24 Remount all cover plates and guards
REMOVE THE KEY FROM SWITCH SA1 (par. 6-2)
It shall not remain in the switch during normal work
25 Close main switch QS1 (position ON) and start the machine. The knife automati-
cally positions against the guide rollers and is ready for sharpening (par. 6-5).
SHARPENING NEEDS ABOUT 30 MINUTES.
NOTE: WHILE WORKING, THE SHARPENING PROCESS MUST BE CON-
TINUOUS
.
After sharpening check the knife for correct position and parallelism as follow: set
0.2 mm splitting thickness, mount the steady guide bar, depress foot pedal P (fig. 1)
and with a thickness gauge check the gap (0.5 mm) between the knife and the back
edge of the steady bar (fig. beside)
B
A
C
D
H
L
D
0.5 mm
Maintenance
AG