Jensen A141 XL ZKX, Operating Instructions Manual

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HC 960 Operating Manual
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Bedienungsanleitung.doc
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Stand/Version: 25.02.2005/00
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Layout: Gottschalk
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1. Introduction
Chipper Control HC 960 has been designed to prevent chipper overload, therefore, eliminating engine
stalling. The use of HC 960 also removes the need for manual operation of the feeder. This is achieved
by monitoring the cutting wheels RPM. If the speed drops below the manufacturers desired spec, the con-
trol stops the feeder. As the cutting wheel has regained its desired speed the control restarts the feeder,
therefore allowing continuous chipping.
The HC 960 is a wood chipper “no-stress-system“ with two integrated hour meters. One of them is reseta-
ble by the operator and the other one can only be reset by the manufacturer. Before you can use the HC
960 you have to program various parameters in order to adapt the unit to your machine.
2. Operating modes
To increase the flexibility of the HC 960 it can be used in two different ways: the semi automatic mode
(parameter n =0) and the fully automatic mode (parameter n>0). The semi automatic mode should be
used on chippers which are powered by a tractor. The automatic mode should be used on machines
which have their own engine.
When using the semi automatic mode you have to push the S-button once after the cutting wheel has
reached its rated speed, in order to teach in the normal speed. At this speed the feeder will start working.
In case you change the speed later on you have to push the S-button again, to teach in the new normal
speed. The rated speed keeps memorised until power has been turned off.
There are two different kinds of values you can use to program the parameters. On tractor driven ma-
chines (semi automatic mode) you have to enter relative numbers (1-99%) for the parameters “L“ , “H“
and “ret“. This is necessary because the programming is usually done only once by the chipper manufac-
turer who do not know the speed of the tractor that is used by the operator. For that reason you cannot
program absolute numbers (i.e. 1000 rpm). To enter relative numbers decrease the values until a “P“ ap-
pears in front of the value (i.e. P 10). The “P“ means percentage and indicates a relative number. Further
information concerning the semi automatic mode is given in table 1.
In opposite to this, use absolute numbers on machines which have their own engine. These machines
usually run always at the same speed. In this case absolute numbers are easier to handle. Further infor-
mation concerning the fully automatic mode is given in table 2.
3. Parameters in semi automatic mode
Name Meaning Remarks
L
(ow) Minimum If the cutting wheel turns slower than the minimum speed; speed the feeder
will be stopped in order to give the cutting wheel the chance to regain its
normal speed. A value of i.e. P 10 means that the feeder will be stopped
when the speed falls to a value which is 10% lower than the normal speed.
Please note that there is no control if set to zero.
Valid values: 0-99%
n
(ormal) Normal This parameter has to be set to zero in this operating mode.
Valid value: 0
H
(igh) Maximum If the cutting wheel turns faster than the maximum speed; speed the feeder
will be stopped for safety reasons. A value of i.e. P 15 means that at a
speed which is 15% higher than the normal speed the feeder will be
stopped. Entering a zero means the maximum speed will not be controlled.
Valid values: 0...99%
Ret
(urn) Return
speed The return speed is the speed which restarts the feeder. If you enter a value
of P 05 this means the feeder starts as soon as it reaches a speed that is
5% lower than the normal speed.
Valid values: 1...99%