3-46 OM 28Z3 US – Edition 2.0 * * 28Z3b340.fm
Operation
3.26 Control lever with proportional controls (option): overview
Important!
Fast actuation of the control lever for the attachment moves the attachment
quickly. Slow actuation of the control lever moves the attachment slowly.
Function
This control mode offers proportional operation of the auxiliary hydraulics circuit depending
on the position of slide switch B on the joystick.
You can also modify the properties of the characterisitic curve. Precision work, for instance
with the offset bucket, does not require the full throughput of the auxiliary hydraulics.
Therefore we recommend setting the controls to the low characteristic curve 1 (slow move-
ments).
The slide switch is not pressed fully in this position and you can move the machine more
smoothly (flat characteristic curve).
If you require the full throughput then characteristic curve 2 will be the choice to make
(slide switch pressed as far as it will go).
NOTICE
Always use button C on the joystick for hammer operation.
• Do not use characteristic curve 1 for hammer operation since as
described above, oil throughput is not set to maximum in this case and
therefore the hydraulic output is not fully available for hammer operation.
• Pressing button C ensures full throughput regardless of the characteristic
curve that has been selected.
current characteristic
valve current [A]
potentiometer voltage [V]
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