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Customised positioning system and control unit for SCS

11 December 2018

Sensor Coating Systems Ltd pioneered the development of sensor technology based on luminescence materials for engineering applications in demanding environments.

The technology allows for accurate temperature detection, corrosion and erosion monitoring and life-time predictions. This in turn contributes to optimising machine operation, can reduce fuel costs whilst maintaining material integrity.

The company has worked with LG Motion over a number of years and this latest project was to design a positioning system to improve the reliability and consistency of their scanning and measurements.

The requirement

A customised XYZR Positioning system was required to scan an area of 500mm x 500mm x 500mm and move a Measurement Sensor over the area at speeds of up to 20mm per second. The equipment would be designed and manufactured as a “stand alone” piece of equipment which would then be mounted at SCS onto an optical work surface.

As a key requirement is to achieve uniformity of scans, positional repeatability is very important.

The solution

The XYZR motorised scanning system consists of tried and tested linear dovetail slides and a worm and wheel driven rotary table, each axis being driven by a stepper motor

The system is manufactured from a high-grade aluminium alloy and employs linear dovetail bearings with precision leadscrews for accuracy and reliability.

Features of the XYZR system

• Usable travel: 500mm x 500mm x 500mm

• Positioning repeatability: XYZ <0.05 mm, uni-directional and R <0.01 degree, uni-directional

• Working speed: XYZ, up to 20mm per second and R up to 90 degrees per second

• Working load: XYZ, up to 1kg and R, up to 50kg

• Limit switches: Microswitch fitted at extremes of travel

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