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HMCflex
7. Chipper controller
To operate a wood chipper, stump cutter, crusher or other machines with a feed and retract mecha-
nism, where excessive material load (clogging) can cause an overload or stalling of the engine.
For this purpose, the output functions FeedfwdETR, FeedfwdETS, FeedbckETR and FeedbckETS are
provided. The Pin 9 input used as external stop in the standard application, is now used to query the
hood switch. When the hood is opened, the engine is shut off.
ATTENTION!
Even if the engine is immediately at standstill, the chipper blade may run on for
some minutes due to its high mass. Risk of injury!
7.1 Switch release – Chipper Mode 0
Start state:
Feed and return are deactivated after the engine start. Pressing the switch on Pin 7 makes the control
switch to the inactive state.
If the hood switch is released the control shows an error. In this case the control needs to be restarted
and the error has to be acknowledged.
Inactive state:
Return is permanently on.
Pressing the switch on Pin 7 makes the control switch to the active state.
Pressing the switch on Pin 4 makes the control switch back to the start state.
If the hood switch is released the control shows an error. In this case the control needs to be restarted
and the error has to be acknowledged.
Active state:
Exceeding norm RPM activates the feeder. Dropping below low speed deactivates the feeder and
activates the retractor for the chosen push time. If the rpm rises above return rpm again the feeder is
activated. Exceeding top rpm deactivates the feeder. The feeder is only reactivated when the rpm
drops below norm rpm again.
© ehb Errors expected.
Operating Instructions
Version 2.9.4
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