Clamp Lowers But Knife Does Not Lower - Horizon Fitness APC-61 Manual

2-5 Clamp Lowers but Knife Does Not Lower

Clamp operates only and knife never
operates, though cut buttons are pressed.
Cutting knife ON/OFF switch is on.
View A
Knife Lower Limit
Position Sensor
Cutting Knife
ON/OFF Switch
When cutting knife ON/OFF switch is on, only
clamp operates and knife does not operate. In
normal cutting operation, turn off this switch.
When pressed cut buttons, clamp lowers
at first and knife begins to lower. But
knife lifts before it is reached to the
lower limit and clamp also lifts.
Knife lower limit position sensor does not
operate correctly.
LED
Knife Exchange
Position Sensor
LED
Lower Limit
Position Sensor
[View A]
If knife lower limit position sensor short-
circuits to ON side (close side), it determines
that knife has reached lower limit position
though it does not. Therefore, when knife
begins to lower it soon returns to the upper
limit position.
2-13
WARNING
Turn off the switch of hydraulic pressure
before the following operation. Other-
wise heavy accident can result.
Check the voltage between 4 and 5 of CON1
on the control board (See "7-5 Control Board,
Connector Layout"). If it is 5VDC, sensor has
no problem. However, if it is 0VDC, sensor
short-circuits to ON (close) side.
24V
RED
Output
WHT
Sensor
Shield
0V
7
6
5
4
3
2
1