  For Cable-Driven Parallel Robots, the cable length is the only element we
control. Better knowledge of this parameter will improve robot performances. We
propose a new cable length autocalibration subsystem. It consists of an
instrumented cable, inductive sensors and a controller for digital data
processing. Cable would be instrumented by metallic marks, with variation in
distance between successive marks. Inductive sensors will allow the detection
of metallic marks; it will be placed vertically on the support, with variation
in distance between successive sensors. Each detection will correspond to a
cable length. By analyzing the succession of cable lengths detected at
particular moments, we can identify our position on the cable, then deduce its
length. A closed-loop autocalibration may allow continuous cable length
adjustment.
