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end of the tube run; in contact with the main installer using a radio transmitter/receiver
of some description. In this way the main installer may be advised when the cable has
completed the run, he can then stop the machine.
If there is an unexpected obstruction in the tube route the rollers will see this as an
increase in torque demand, assuming the torque control has been set at an appropriate
level, the rollers will stop turning before they push the cable so hard as to cause it to
buckle. If (due to lack of previous knowledge of the cable characteristics) the torque
control has been set at a figure which is too small to push the cable the setting may be
increased. Bear in mind that this will increase the risk of the cable being damaged by
buckling.
6.0 Maintenance
The CBS Cable Blowing Machine has been designed to give reliable, trouble free
service over long periods. The machine requires no sophisticated maintenance
procedures, simple common sense checks and precautions are all that are needed.
The main source of breakdown and/or malfunction of a machine being used outdoors is
contamination by the elements, this contamination may be introduced into the machine
in a number of different ways.
There may be mud, dust or other contaminants carried into the machine on the cable or
tube (there may be surface coatings of lubricants or other release type agents on the
outer surfaces of the cable and tube, this could build up on the rollers and make them
slip).
The machine may be set down on a muddy surface, or be splashed by road going
vehicles when it is being used by the roadside.
It is convenient to consider each function of the machine in turn.
