RELM20 high accuracy linear scale

Transcription

1 L B RELM20 ZeroMet scale is manufactured from near zero thermal expansion material, ensuring the high level of accuracy is maintained across the full temperature range. It can be mounted direct to your machine either mechanically or by the use of a self-adhesive backing tape. RELM20 scale also features the IN-TRAC optical reference mark allowing fast auto-phasing. RELM20 is a 20 µm pitch scale and is compatible with Renishaw s VIONiC, TONiC and SiGNUM range of encoders, offering levels of performance previously only available from delicate fine pitch systems. High accuracy, certified to ±1 µm up to 1 m, calibrated against International Standards Robust ZeroMet offers 0.75 ±0.35 µm/m/ C@20 C thermal expansion plus ease of handling and installation Scale mounting with self-adhesive or clips and clamps IN-TRAC bi-directional auto-phase optical reference mark Dual limits provide on-scale end of travel indication

2 Specifications Scale Form (H W) 1.6 mm 14.9 mm Scale lengths (L) 80 mm to 1.5 m (available in increments of mm) Measuring lengths (ML) Max overall length L (mm) Measuring length ML (mm) - with no limits Measuring length ML (mm) VIONiC and TONiC - with mm dual limits SiGNUM - with mm dual limits 1.5 m ML = L - mm ML = L -20 mm ML = L mm Accuracy Material Thermal expansion (at 20 C) Mounting Mass Certified to ±1 µm for lengths up to 1 m, ±1 µm/m for lengths >1 m to 1.5 m Calibrated traceable to International Standards ZeroMet. High stability, low-expansion nickel-iron alloy 0.75 ±0.35 µm/m/ C Epoxy datum point and adhesive tape or datum clamp and mounting clips Adhesive backing tape is included with all scale (nominal thickness 0.2 mm) 184 g/m Reference mark Type IN-TRAC optical reference mark Position Phasing Repeatability RELM20 midpoint of scale length RELE20 20 mm from end of scale Auto-phased by readhead calibration routines Repeatable to unit of resolution throughout specified temperature and speed range For further information on installation and mounting options, please refer to the RELM20 installation guides (M , M or M ), which can be downloaded from or Compatible with VIONiC, TONiC and SiGNUM readheads Filtering optics and Auto Gain Control for high reliability and solid Lissajous signals Dynamic signal processing ensures ultra-low Sub-Divisional Error (SDE). Result: smoother scanning performance High signal-to-noise ratio provides ultra-low jitter for optimum positional stability Auto-phasing of IN-TRAC reference mark Industry standard 1 Vpp analogue outputs and RS422 digital resolutions available Clocked outputs ensure optimised speed performance for all resolutions, for a wide variety of industry standard controllers VIONiC TONiC SiGNUM Outputs SDE (typical) Digital resolutions from 5 µm to 2.5 nm direct from the readhead Analogue 1 Vpp only. RS422 digital resolutions from 5 µm to 1 nm available when connected to a Ti, TD or DOP interface Using the SiGNUM interface,outputs include: 1 Vpp analogue, RS422 digital resolutions from 5 µm to 5 nm or FANUC serial < ±15 nm ±30 nm ±30 nm Jitter (RMS) down to 1.6 nm down to 0.5 nm down to 7.5 nm Maximum speed 12 m/s m/s 12.5 m/s 2

3 A MADE IN UK S/N: 0A1234 A MADE IN UK S/N: 0A1234 Data sheet Scale installation with TONiC (adhesive mounting method shown) For further details please refer to VIONiC, TONiC or SiGNUM RSLM20/RELM20 Installation guides Alternative reference mark position (RELE20) 0.5 F Datum edge 0.05/50 Alignment dowels F = axis of motion 6 ± ± ±0.25 L/2 ±0.25 L 1.7 ±0.1 Measuring length, ML = (L-25) with mm limits 17.5 ML = (L-) without limits 2.1 ± Optical centreline (incremental and reference mark) 7.8 Limit sensor position 12 RGG-2, 2-part epoxy Double-sided adhesive tape NOTE: Adhesive mounted scale should not be reused after installation. Epoxyed area, usually coincident with IN-TRAC reference mark (RELE20 shown). Double-sided adhesive tape is included with all scale lengths. When scale is to be mounted vertically, position the dowels so that the datum edge is supported. 3

4 Scale installation with SiGNUM (clip/clamp mounting method shown) For further details please refer to SiGNUM, VIONiC or TONiC RSLM20/RELM20 Installation guides RELM20 (Centre reference mark) L/2 ± A MADE IN UK S/N: 0A Mounting clip RELE20 (End reference mark) 31 A MADE IN UK S/N: 0A ±0.25 Mounting clip (A ) Special M3 low-profile screw with 1.5 mm hex socket (A pack of 25) 1.8 (clip height) 23 ± Counterbore all mounting holes 3.2 mm diameter 1 mm to 1.5 mm deep minimum depth full thread 17.1 L Datum clamp (A ) Special M3 low-profile screw with 1.5 mm hex socket (A pack of 25) 23 ±0.25 Counterbore all mounting holes 3.2 mm diameter 1 mm to 1.5 mm deep minimum depth full thread 0.5 F 0.05/50 F = axis of motion Datum clamp (see note) 1.9 (clamp height) 8 ±0.25 Scale centreline Datum edge 14.9 ±0.2 6 NOTES: Datum clamp usually coincident with selected IN-TRAC reference mark. However, the position is user selectable depending upon the application. For lengths 80 L 190 ensure scale is clamped or clipped in the middle as well as at both ends. See On scale limits and selected reference mark section for limit and selected reference mark alignment. For optimum performance the readhead should be installed close to nominal geometry. Care should be taken to ensure sufficient clearance between the readhead/mounting bracket and clips/datum clamp. Only special low-profile screws should be used. Screws are provided with all clips/datum clamps and spares can be supplied if required. 4

5 VIONiC readhead installation drawing Optical centreline (incremental and reference mark) ± P limit magnet (A ) 15 Reference mark selector sensor position 6 min R > 30 Dynamic bend radius R > Static bend radius Ø4.25 ± Optical centreline marker *Extent of mounting face. Forward direction of readhead relative to scale (Roll tol. ±0.5 ) 0.08 (Yaw tol.±0.4 ) 0.25 Mounting faces ±0.5 Q limit magnet (A ) (Dimensions as P limit) P and Q limit switch sensor position Set-up LED 2 mounting holes M2.5 through, counterbored Ø3 x 2.3 deep both sides (Pitch tol. ±1 ) 0.6 Rideheight: 2.1 ± (Clip/clamp mounting) 1.8 (Adhesive mounting) 8.75*

6 TONiC readhead installation drawing (Yaw tol. ±0.4 ) (Roll tol. ±0.5 ) P and Q limit switch sensor position Scale and optical centreline Alternative mounting face 8.75* 14.9 ± * P limit magnet (A ) Forward direction of readhead relative to scale 15 6 min Optical centreline (incremental and reference mark) 2 mounting holes M2.5 through, counterbored Ø3 x 2.75 deep from alternative mounting face Set-up LED Q limit magnet (A ) Recommended mounting faces R > 20 Dynamic bend radius R > Static bend radius CAL/AGC LED mounting holes M2.5 through, counterbored Ø3 x 2.3 deep both sides Ø4.25 ±0.25 (Pitch tol. ±1 ) Rideheight 2.1 ± (Clip/clamp mounting) 1.8 (Adhesive mounting) *Extent of mounting faces. For TONiC readhead Installation details refer to TONiC T1x RSLM20/RELM20 Installation guide (M ). 6

7 SiGNUM readhead installation drawing (Yaw tol. ±0.4 ) ± min R > 20 Dynamic bend radius R > Static bend radius *Extent of mounting faces. Recommended thread engagement 5 min (8 including counterbore). Recommended tightening torque 0.5 to 1.0 Nm. For SiGNUM readhead installation details refer to SiGNUM RSLM20/RELM20 Installation guide (M ). Set-up LED 14 2 mounting holes M3 x 6 deep 2 mounting holes M3 through, counterbored 3 deep both sides (Pitch tol. ±0.5 ) 0.32 Ø4.7 ± (Roll tol. ±0.5 ) (Clip/clamp mounting) 1.8 (Adhesive mounting) 8 ±0.25 Scale and optical centreline Optical centreline (incremental and reference mark) 6 typ* Rideheight 0.8 ±0.08 Limit sensor position 7

8 On-scale limits VIONiC and TONiC systems (TONiC shown) A MADE IN UK S/N: 0A1234 P limit ( mm, A ) Q limit ( mm, A ) Limit magnets are available in mm, 20 mm and 50 mm lengths and supplied on a back plate with self adhesive tape. NOTE: Use of limits will affect the available measuring length as shown in the measuring length table (page 2). SiGNUM system P limit Q limit A MADE IN UK S/N: 0A1234 Self-adhesive limit markers are available in mm, 20 mm, and 50 mm lengths as pre-aligned pairs on backing paper (A ). NOTE: Use of limits will affect the available measuring length as shown in the measuring length table (page 2). NOTE: Si interface configuration should be chosen such that limits are activated. Reference mark position No external actuators or physical adjustments are required. RELM20: IN-TRAC reference mark positioned at centre of scale length. A MADE IN UK S/N: 0A1234 RELE20: IN-TRAC reference mark positioned 20 mm from end of scale length. NOTE: When using a VIONiC or TONiC system the readhead should be ordered so all reference marks are output; no actuator magnet is required. 8

9 Renishaw plc New Mills, Wotton-under-Edge Gloucestershire, GL12 8JR United Kingdom T +44 (0) F +44 (0) E uk@renishaw.com Scale part numbers RELM20 20 µm pitch ZeroMet spar scale with single IN-TRAC reference mark at mid-point of scale length. Part number Available lengths Available in increments of Ordering instructions A-9660-xxxx 20 mm to 1500 mm mm xxxx is the length in mm. Ordering A for example will result in a length of 450 mm. RELE20 20 µm pitch ZeroMet spar scale with single IN-TRAC reference mark 20 mm from scale end. Part number Available lengths Available in increments of Ordering instructions A-9661-xxxx 30 mm to 1500 mm mm xxxx is the length in mm. Ordering A for example will result in a length of 450 mm. RELM20/RELE20 compatible readheads RELM20/RELE20 TONiC RSLM20/RELM20 Installation guide M Data sheet L SiGNUM RSLM20/RELM20 Installation guide M Data sheet L VIONiC RSLM20/RELM20 Installation guide M Data sheet L For worldwide contact details, please visit our main website at RENISHAW HAS MADE CONSIDERABLE EFFORTS TO ENSURE THE CONTENT OF THIS DOCUMENT IS CORRECT AT THE DATE OF PUBLICATION BUT MAKES NO WARRANTIES OR REPRESENTATIONS REGARDING THE CONTENT. RENISHAW EXCLUDES LIABILITY, HOWSOEVER ARISING, FOR ANY INACCURACIES IN THIS DOCUMENT. RENISHAW and the probe emblem used in the RENISHAW logo are registered trademarks of Renishaw plc in the UK and other countries. apply innovation is a trademark of Renishaw plc Renishaw plc All rights reserved Issued 0818 *L *