Touch Module
Designed to operate with Rotadata combi traverse systems, the touch module ensures operators cannot inadvertently drive a probe into an electrically grounded obstruction in the test area.
Operating on the same principle as the Rotatip tip clearance system, the module generates a
high voltage on a short length of coaxial cable. If the inner core
of the cable is exposed at one end, the voltage can discharge to
any grounded object place within a distance of a few microns.
The resulting low energy discharge generates a signal in the touch module, which is fed to the combi controller and used to stop the probe. For satisfactory operation, the module must be placed within one metre of the discharge point. For this reason a one metre cable is supplied with the touch module. The cable must not be extended.
The power supply for the touch module is generated in the combi controller and connected through a multi-core cable. No other power supplies are required.
The touch module requires only to be plugged in to a standard combi controller to operate satisfactorily.
The touch module can be mounted any distance from the combi controller depending on the length of the multicore connecting cable. Please make sure you order the correct length of cable for your installation.
To use the touch module the end of the one metre long coaxial cable should be exposed to form a simple electrode. The cable should then be attached to the probe by any suitable means, with the electrode extending beyond the probe in the direction of probe movement.
The probe will now discharge to any electrically grounded object the probe approaches and thus protects the probe from accidental collisions with duct walls, projections in the traverse area etc.
It is not necessary to connect the coaxial screen at the electrode end since the probe is grounded to the rest of the equipment through the multi-core connecting cable. It is recommended that the touch module be mounted onto the actuator, or to some other rigid support within the one metre range of the coaxial cable.
Up to two touch modules can be used with one actuator, thus giving collision protection in two directions.
Operators with a combi controller who have not previously used the touch facility need only buy the required number of touch modules and the multi-core cables. The connectors, circuits and software needed to use the touch facility are a standard fitting and the combi controller will not require modification.
