HAPP 40
© 2013 HAPP Australia Pty Ltd
Version 8
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13.
Lay out and connect the balance cables
(wire rope) (not required for HAPP
90). The balance cables are designed to align the levels of the carriage and
distribute the load so the carriages lift evenly. Do not tighten the balance
cables fully at this stage.
Lift each carriage up until both safety latches engage about 400-800mm or
onto two blocks of
equal height
to enable the cable to be routed more easily.
The cables are installed so that one side pulls the other side if it is not aligned.
The pulley systems for both clear floor and floor plate models route the cable
from the bottom of one carriage through pulleys to attach from the top to the
other carriage. As the carriage is raised if the other carriage is not raising at
the same rate the cable will pull the other carriage up. The cable attached from
the bottom will be doing the pulling as the hoist lifts.
Conversely as the carriage is lowered if one carriage is lowering faster than
the other it will pull down on the cable attached from the top, pulling the other
carriage down by the other end of the cable which is attached from below the
carriage. These points are important when fine tuning the carriages to lift and
lower at the same time using the adjustment nuts. Once balance cables are
connected the safety latches can be released or blocks can be removed and
the carriages lowered to the floor.
Figure: Cable routing for clear floor hoist.
Steel cable
Cylinder
Nut
