Renishaw: RGS20-S Scale 410MM (A-9523-6041)

Renishaw’s patented RGS20-S scale comprises 20 µm graduations on a steel strip 6 mm wide and 0.2 mm thick and features a thin gold surface layer to enhance reflectivity.

A lacquer coating provides protection against handling and contamination. The 20 µm pitch scale is suitable for use with all Renishaw RG2 series readheads: RGH22, RGH24, RGH25 and RGH26. Whilst the 40 µm RGS40-S is suitable for use with the RGH34 and RGH41 readheads. The scale is supplied with a specially formulated adhesive backing tape. Installation is quick, easy and suits both high volume production and one-off field service installations. To simplify customer inventory and maximise production flexibility, the scale can be supplied on a reel for ‘cut-to-suit’ convenience at the point of installation. RGS20-S and RGS40-S are suitable for mounting to most common engineering materials including metals, granites, ceramics and composites, whilst RGS20-PC and RGS40-PC polyester coated versions have an increased resilience to solvent and lubricant attack. The scale ends are rigidly fixed to the axis substrate by means of epoxy fastened end clamps, eliminating the need to drill holes. Because the scale has a very small cross section, it is ‘mastered’ to the substrate and matches its thermal expansion. Differential movement between the scale and the substrate is close to zero, even throughout significant temperature swings