Heiniger TPW Aussie Xpress, Operator'S Manual

Page: 16 / 25

MA005 TPW Woolpress Operator Manual 2019-06-06
Rev:05
16
12.10 Unpinning clearance
The retraction of the baling pins is a crucial part of the press's operation. The pins are
retracted by the unpinning posts, which are welded to the platen, pulling down on the
rocker arm pawls, which are in between the top cross members.
To enable the baling pins to be fully retracted from the wool, the posts must remain in
contact with the pawls until the baling pins are fully retracted.
This length of contact or "travelling purchase" can only be achieved by having the gap
between both components as close as possible once they have separated.
No less than 0mm and no more than 2mm.
If this gap is too excessive due to wear on the pawls or distortion of the platen, the
unpinning posts will lose contact with the pawls prematurely, leaving the baling pins
partially in the bin while the wool is being pressed, possibly resulting in damage to the press
or woolpack.
Unpinning clearance illustration
12.11 Hydraulic pump operation
The Nachi PVS-IB-22 Pump is a variable displacement piston pump with a pressure
compensator valve.
The pump produces a flow of 30 lts/min (7 gpm) until pressure builds to 5000 KpA (750
psi).
This opens the pressure compensator valve and reduces the flow to approximately 7-
9Its/min (1.5-2.0 gpm, second stage)
When the changeover to the second stage happens, you should notice a change in sound
and speed, and a reduction in load on the motor.
The compensator valve adjustment controls the pressure at which the changeover cycle
takes place. 5000 kpa (750psi)
Before adjusting any settings it is advisable to measure and note the standout
distance of the screw. Screw adjustments in to increase, out to decrease.
C
yl
in
d
e
r
R
od
Rocker arm
post
Unpinning
rod
Push
Platen
Pawl
Guide rod
0mm
+ 2mm
-0mm
clearance