3 safety features – Sterlco SPS Series Pipe Shredder User Manual
Page 30

GRN4-610
Chapter 2: Functional Description
30 of 73
Pulse/Push function
In normal process mode the pusher pushes forward continuously till the pusher arm reaches the 
proximity switch which reverses the function and the pusher moves backwards. By changing the 
switch (9) to “Pulse push” function on the main control board the pusher moves forward in steps. 
This means, after each step the pusher remains in his position for a small while before it moves 
forward again. This function should be used for very heavy applications and in case of danger to 
overload the system 
2-3 Safety Features
Protective Devices
The machine may under no circumstances be operated without these protective devices or 
with faulty or manipulated protective devices. 
Safety device for housing flap
Illustration: 
 
(1) Safety device for lower 
housing flap 
(2) Safety device for 
upper housing flap 
The shredder can only be operated if the housing flap is closed and thus 
deactivating the safety switch. If the housing flap is opened, the contact is 
2
1
