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13.
DETERMINING MAXIMUM TORQUE SETTING
When preforming an installation of a larger or stiffer fibre it may be
necessary to use a non-buckle or ‘straight’ set of blowing plates. To ensure
the integrity of the fibre at all times during the installation it is crucial a test is
performed. This test will provide the installer with the maximum torque
setting for the machine such that if the fibre hits a blockage at speed, the
fibre will not be damaged.
Set the machine up as per section 6 using non-buckle plates
(therefore no buckle shuttle will be present).
Instead of attaching to the installation route use a 5m length of the
same tube. Use a stop end kit to block the end of the tube.
Set the speed to the maximum installation speed to be used.
Set the torque to c.10%.
Press ‘start’. The machine will now accelerate to the speed setting.
When the fibre hits the end stop the machine will either stop and
leave the fibre undamaged or continue to install and break the fibre,
in either case press ‘stop’ to prevent the machine from trying to
continue the install. Reduce or increase the torque setting as
appropriate for the outcome of the previous test and perform the
test again. Through several iterations a torque setting just below the
value which would break the fibre should become apparent.
