Epec 4W30, Instructions For Use Manual

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Instructions for use Epec 4W30 15
(C) Epec Oy Seinäjoki Finland
3.3 Different Steps of Harvesting
When starting to feed the tree to the selected length, the feeding is
accelerated so that the outputs "Feed forward 1", "Feed forward 2",
"Feed forward 3" and "Feed forward 4" are controlled on consecutively.
After each output has been controlled on, there will pass a settable time
delay (look at section "7.26 Feed delays"), before the next output is
controlled on. Thus "Feed forward 1" is controlled on
à
time delay
à
"Feed forward 2" is controlled on
à
time delay, etc.
The measuring equipment selects, based on the distance to be fed, fast
speed, low speed or search pulses. All the feed modes are used, if the
distance left is more than twice the braking distance of the feed mode in
question. If for example the braking distance for fast feed is 200 mm,
the tree is fed with this feed mode, if the distance left until the desired
length is reached is more than 400 mm, otherwise the tree is fed by low
speed mode. The braking distance is the distance that the tree moves
after the control of the feed valves has stopped.
If there does not come enough pulses from the length sensors when
feeding during the slip prevention time (feed jammed), the automatic
feed is interrupted. When the slip prevention is zero, it is not in use (look
at section "7.31 Slip prevention").
3.4 Volume Calculation (if diameter is in use)
The diameter of the piece is measured with intervals of 10 cm while
feeding forward, and only diameters smaller than the previous one are
registered for volume calculation. When the piece is crosscut, the
volume is calculated based on the registered length and diameter
values. The tree must be fed from the butt end towards the top.
If the grapple has to be opened during the feed, the volume calculation
of that piece will be interrupted. The handling of this piece must be
started from the beginning by sawing a disk at the butt end.
3.5 Special Situations
3.5.1 Handling of a Dropped Tree
If the tree has dropped from the grapple, the volume calculation of the
tree is interrupted. Then proceed as follows:
1. Open the grapple.
2. Take the butt end of the tree into the grapple.
3. Saw a disk at the butt end.
4. Feed normally.