P550c Operation Manual
6 Operating the system
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Fig. 6.10 Using rollers to reduce cable wear
Distance counter and stop point
Once you have deployed and positioned the crawler in the manhole, using manhole rollers to protect the
cable and ensuring that the cable protection spring has cleared the drum rollers, you should zero the
distance counter.
The zero (0.0) position is used to decide when to stop the system when reversing the crawler. This is a
safety feature.
Manhole roller (known as “uphole roller”)
Downhole roller (known as the “tiger tail”)
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