5
Appendix
5.1 Special KCM LWF features
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Docu-No.: 0590020601-EN Rev. 1.6.0
5
Appendix
5.1
Special KCM LWF features
5.1.1
Automatic Gear Switching for LWF
Notes:
• See KCM Electronics manual for wiring information on reversing
motor rotation.
• Automatic gear switching is only possible on selected K-Tron
feeders that utilize the dual speed gearbox. Refer to the feeder
manual for specific details.
To use the gear switching one must connect a reversing contactor to
a digital output of the KCM. It can be a CPU on-board output or a relay
of the motor drive board. The output will be activated for low gear and
deactivated for high gear.
It is recommended to use two digital outputs where one output polarity
is inverted. Each output should control one contactor, one for normal,
on for reverse. The motor shall be disconnected if the contactors are
inactive. There should be further an interlock so that it is not possible
that both contactors are activated at the same time.
This has the advantage that not correct entered parameters or a
hardware fault (e.g. a power failure) will not reverse the motor while it
is running.
Gear switching is automatically enabled, if in the programming, a
digital output is assigned to <HI/LO Gear>.
When gear switching is enabled, the following parameters are visible
in the menu:
MACHINE SETUP menu, MOTOR sub-menu- GEAR RED LOW and
additionally in the PRODUCT CHANGE menu, GEARSWITCH
(choices: High, Low, Auto Hi, Auto Lo).
To work properly, the correct high and low gear reduction values must
be entered to the GEAR REDUC. and the LOW GEAR REDUC.L.
parameters. The value <Gear Reduc> is the highest screw speed/
lowest value reduction while the <Gear Reduc L.> is the lowest screw
speed/highest reduction value.
The lower gear reduction ranges from 1 to 10 times the high gear
reduction. Auto-checking of the parameters is done to verify the
proper relationship between the two entries.
Switching is only enabled if the feeder is stopped, the Drive has no run
signal and the raw speed from the Drive is < 2 rpm for at least 3
seconds.
When the gear switches from high to low or vice versa, the initial and
the average feed factor will be set to the average feed factor times the
