Renishaw: RESD angle encoder with distance-coded reference marks RESD20USA209

The RESD is a one-piece stain less steel ring with 20 µm scale marked di rectly onto the periphery, featuring distance-coded IN -TRACTM auto-phase optical reference marks.

Distance-coded reference marks are spaced at defined unique intervals, allowing a controller to calculate absolute position with only a small movement of the axis. The RESD offers impressive accuracy with resolution to 0.002 arc second, suiting the most demanding precision applications.

Read by Renishaw’s TONiC encoder system, it has high tolerance to dirt, scratches and greasy fi n gerprints that can cause other encoder systems to miscount

The low profile RESD, with large internal diameter, is easy to design into most installations. Equally important, its low mass, low inertia design does not compromise system performance. RESD is available in a range of sizes and line counts, providing compatibility with industry standard controllers.

System features

• Compatible with the TONiC T20x1 encoder system offering industry standard analogue or digital incremental outputs

• Distance code IN -TRAC bi-directional optical reference marks allow absolute position to be calculated after a small movement • High speed operation, up to 3 673 rev/min (10 m/s)

• Graduation accuracy to ±0.99 arc second (209 mm ring) • New high-resolution, 2 nm and 1 nm digital versions

• Angular resolution to 0.002 arc second

• System repeatability to 0.003 arc second

• Patented taper mount simplifies integration and minimises installation errors

• Large internal diameter enables easy design-in

• Available in sizes from Ø52 mm to Ø209 mm with line counts from 8 192 to 32 768

• Custom sizes and very large diameters also available

• Low mass and low inertia

• Integral set-up LED on readhead for quick set-up and instant ‘health check’ at any time

• True absolute encoders also available from Renishaw. Please contact your local representative for details.

Supporting Links RENISHAW: REXM/REXT ultra-high accuracy angle encoder