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Renishaw: REXM20 ultra-high accuracy angle encoder system REXM20USA052
Renishaw: REXM ultra-high accuracy rings - REXM20USA052
 
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Renishaw: REXM20 ultra-high accuracy angle encoder system REXM20USA052

With zero coupling losses and exceptional repeatability, the REXM20 ultra‑high accuracy angle encoder achieves better than ±1 arc second total installed accuracy. Like the RESM20 encoder, the REXM20 is a stainless steel ring with the scale graduations marked axially onto the periphery, but with a number of differences to improve upon RESM20’s already impressive accuracy. REXM20 has a thicker cross-section, to ensure that the only significant installation error is eccentricity. Eccentricity is easily removed using two readheads, either with Renishaw’s DSi (Dual Signal interface), or by combining the signals inside the host controller. The only errors remaining are graduation errors and readhead SDE, both of which are so small they are often negligible. As a non-contact encoder, REXM20 offers dynamic performance advantages, eliminating coupling losses, oscillation, shaft torsion and other hysteresis errors that plague enclosed encoders. Combining two readheads is easy with the DSi, which also offers an angularly repeatable reference position (propoZ ™) which is unaffected by bearing wander or power cycling. REXM20 total installed accuracy grades: Designed for axes that are limited to partial rotation, REXT20 rings have two reference marks, oriented diametrically opposed, for use with partial arc versions of DSi. DSi processes these reference marks to give a single, angularly-repeatable propoZ reference output.

Features:
• Use with two VIONiC™ or TONiC™ encoders, combined with DSi to give ultra-high accuracy • Installed accuracy to ±1 arc second with dual readheads • Wide range of standard sizes from 52 mm to 417 mm • Large internal diameter for ease of integration • Flange mounted with easy 4-point adjustment method • Angularly repeatable propoZ reference position is unaffected by bearing wander or power cycling.

REXM ultra-high accuracy rings

For ring diameters >417 mm please contact EPD

Series

Scale pitch

Form

Diameter

Part number

Price US$

REXM

20U (20 µm)

A (standard section)

052

REXM20USA052

2,066

057

REXM20USA057

2,066

075

REXM20USA075

2,239

100

REXM20USA100

3,702

103

REXM20USA103

3,702

104

REXM20USA104

3,702

115

REXM20USA115

3,746

150

REXM20USA150

3,789

183

REXM20USA183

3,875

200

REXM20USA200

3,961

206

REXM20USA206

3,961

209

REXM20USA209

3,961

229

REXM20USA229

4,133

255

REXM20USA255

4,362

300

REXM20USA300

5,769

350

REXM20USA350

6,888

417

REXM20USA417

8,955


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