Chapter 3: Installation 18 of 41
Test the Interlock Switch
With the cutting chamber and screen cradle closed and power ON, perform the
following tests:
1. Push the Start button to start the granulator.
2. With the granulator running, loosen the hand knob on the front access
door to verify the safety interlock switch shuts the machine off. If the
hand knob is completely loose and the power does not disconnect, the
interlock switch is not working and the cause of malfunction must be
determined.
3. Turn OFF and lock out the power.
4. Have an electrician check the interlock switch on the hopper to correct
the malfunction.
5. If necessary, engage the screen cradle interlock actuator screw.
After completing the above procedures, close the control panel. Unlock the
power or return the fuses in the supply panel, turning the disconnect switch to
ON. Pull the start button and release only when the motor has started, and check
again that the rotor is turning in the correct direction.
Checking Knife Position
NOTE: This operation must be carried out by an operator or mechanical
maintenance engineer.
Before undertaking any type of work o the machine, use a feeler gauge to check
the distance between the bed knives and the rotor knives (the knife gap).
To access the cutting chamber, follow the same procedure and observe the
precautionary steps outlined in “Checking the Cutting Chamber.” Before
proceeding to the checks, it is recommended to block the rotor to avoid any
inadvertent rotation.
Once you have safety accessed the cutting chamber, check the current distance
between the bed knives and the rotor knives using a feeler gauge (see figure
below).
Figure: Checking
the knife gap