RTLC high accuracy incremental linear encoder scale system

Transcription

1 L A RTLC high accuracy incremental linear encoder scale system RTLC linear encoder tape scale from Renishaw combines ± µm/m accuracy with the ruggedness of stainless steel. Two versions are available; self-adhesive RTLC-S and RTLC for use with the revolutionary FASTRACK track system from Renishaw. Designed for applications that demand high-accuracy and an independent expansion coefficient with tape scale convenience, RTLC-S and RTLC are read by Renishaw s compact and reliable VIONiC and TONiC family of readheads. RTLC-S is laid onto the substrate using its self-adhesive backing tape. A patented application tool makes this a quick, simple and inexpensive process. A clamp is fitted at a single point to lock the scale to the substrate. RTLC (without self-adhesive) is used with FASTRACK. In this case, the scale is held securely in place by two miniature, yet rugged, guide rails. Again, the scale is clamped in a single point to allow independent expansion with extremely low hysteresis, even over wide temperature ranges. If damaged, the scale can be pulled out of the guide rails and quickly replaced, even where access is limited, thus reducing machine downtime. This feature also makes the new linear encoder system ideal for large machines that need to be sectioned for transportation. RTLC-S and RTLC with FASTRACK are suitable for many applications, including FPD manufacturing and inspection machines, P-V manufacturing, linear motors with aluminium substrates, axes that are exposed to potential damage, large CMMs and other machines that require the scale to be installed/removed for transit, or simply for any application where thermal expansion of the scale must be independent of the machine structure. High accuracy (± µm/m) scale. Further improvement possible with error correction Compatible with VIONiC and TONiC high-performance readheads RTLC scale expands at its own low thermal coefficient (10.1 ±0.2 µm/m/ 20 C) Use with FASTRACK for very low hysteresis FASTRACK guide rails are pre-aligned in reels for cut-to-suit flexibility Quick installation. FASTRACK adds fast scale replacement capability Scale can be locked to the substrate at a single datum point anywhere along the axis RTLC scale can bridge gaps in the FASTRACK up to 2 mm High solvent immunity

2 System features Error (µm) Error plot Position (mm) Example accuracy test result of 3400 mm length of RTLC scale ±6.2 µm High accuracy RTLC and RTLC-S scale u ± µm/m accuracy@20 C, including slope and linearity. Linearity of ±2. µm/m can be achieved with two point error correction u Hardened stainless steel construction is rugged and reliable, with high scratch and solvent resistance u Independent expansion coefficient (10.1 ±0.2 µm/m/ C) u Very low hysteresis: sub-micron on a centre-clamped 2 m axis over the entire operating temperature range, for example u 20 µm scale pitch u Features optical IN-TRAC reference marks every 0 mm; identify one or more using the reference mark selector magnet(s) u Scale can be cut to length using a guillotine, for easy customisation u Track-mounted RTLC using the revolutionary new FASTRACK or self-adhesive mounted, RTLC-S Compatible with VIONiC, VIONiCplus and TONiC readheads u Filtering optics and Auto Gain Control for high reliability and solid Lissajous signals u Dynamic signal processing ensures ultra-low sub-divisional error (SDE). Result: smoother scanning performance u High signal-to-noise ratio provides ultra-low jitter for optimum positional stability u Auto-phasing of IN-TRAC reference mark u Industry standard 1 Vpp analogue outputs (TONiC readhead only) and RS422 digital resolutions available u Clocked outputs ensure optimised speed performance for all resolutions, for a wide variety of industry-standard controllers u DOP Dual output interfaces available to provide simultaneous analogue and digital outputs (TONiC systems only) VIONiC VIONiCplus TONiC Outputs Digital resolutions from µm to 20 nm direct from the readhead Digital resolutions from 0.1 µm to 2. nm direct from the readhead Analogue 1 Vpp only RS422 digital resolutions from µm to 1 nm available when connected to a Ti, TD or DOP interface SDE (typical) <±30 nm <±10 nm ±30 nm Jitter (RMS) down to 1.6 nm down to 1.6 nm down to 0. nm Maximum speed 12 m/s 12 m/s 10 m/s 2

3 RTLC and FASTRACK carrier with VIONiC installation drawing (mechanical datum clamp method) For further details, please refer to VIONiC or TONiC RTLC and FASTRACK installation guides Dimensions and tolerances in mm 1 min (gap) 10 max (gap) Overall length (L + 12) Scale length (L ) Measuring length ML = (L-10) (ML = (L-2) with dual limits) FASTRACK length (L - 24)* Reference mark selector Detail Do not cut FASTRACK over shaded areas 2.2 ± /100 F A 3 max 18 ±0.1 P limit magnet VIONiC readhead Optional end cover (Pair A ) RTLC scale (A-970-xxxx) Q limit magnet 18 IN-TRAC reference mark FASTRACK (A-9704-xxxx) 1 ±1 2 RTLC clamp (A ) 3 M3 x 6 low head screw, supplied with clamp = 12 NOTE: When FASTRACK reference mark and datum clamp aligned as shown, reference output will be positionally repeatable with respect to substrate. Do not place clamp tip over shaded area min thread depth Clamp shoulder Ra 3.2 Nominal P limit Optical centreline (incremental and reference mark) Nominal Q limit 0.0 F *Assumes 1 mm gap between scale and end covers and zero gap between FASTRACK and end covers. NOTE: Minimum recommended FASTRACK length = 100 mm = Additional screws available (Pack of 2 A ) 3

4 RTLC and FASTRACK carrier with TONiC installation drawing (adhesive datum clamp method) For further details, please refer to TONiC or VIONiC RTLC and FASTRACK installation guides Dimensions and tolerances in mm Overall length (L + 12) 1 min (gap) Scale length (L) Measuring length ML = (L-10) (ML = (L-2) with dual limits) FASTRACK length = (L - 24)* 10 max (gap) 2.2 ±0. Reference mark selector magnet A 18 ±0.1 NOTE: When FASTRACK reference mark and adhesive datum aligned as shown, reference output will be positionally repeatable with respect to substrate. P limit magnet Optional end cover (Pair A ) 1 ±1 TONiC readhead (T-103x) RTLC scale (A-970-xxxx) IN-TRAC reference mark Spot of Loctite 43 (2 positions) to secure axis datum position /100 Detail F Do not cut FASTRACK over shaded areas 3 max FASTRACK (A-9704-xxxx) Q limit magnet 3.2 Nominal P limit Optical centreline (incremental and reference mark) Nominal Q limit *Assumes 1 mm gap between scale and end covers and zero gap between FASTRACK and end covers. NOTES: Minimum recommended FASTRACK length = 100 mm. The reference mark selector and limit actuator locations are correct for the readhead orientation shown F 4

5 RTLC-S with TONiC installation drawing (adhesive datum clamp method) For further details, please refer to TONiC or VIONiC RTLC-S installation guide Dimensions and tolerances in mm Ra Overall length ( L + 37 ) Scale length ( L ) Measuring length ( L-17) A 13. Reference mark selector (A ) 8 P limit magnet (A ) Datum clamp (A ) Q limit magnet (A ) Optional end cover (Pair A ) Readhead optical detector position at extent of travel 3 P limit trigger point 23 D Q limit trigger point 0.0 F C 12.1 = 4.6 = Optical centreline (incremental and reference mark) Detail D Detail Detail C 1 ±1 End cover alignment indicator Scale reading surface Scale thickness 0.2 Adhesive thickness Readhead to scale clearance Rideheight 2.1 ±0.1 = Dimensions from scale surface. NOTE: olted reference mark selector and limits also available. See TONiC T103x RTLC-S installation guide for details.

6 RTLC-S and RTLC/FASTRACK specifications Description RTLC-S Self-adhesive incremental high-accuracy hardened and tempered stainless steel. RTLC Incremental high-accuracy hardened and tempered stainless steel scale for use with FASTRACK track system. FASTRACK Hardened stainless steel guide rails with integral sacrificial spacers, with self-adhesive backing tape for easy installation. Form RTLC-S 0.4 mm x 8 mm (H x W) including adhesive FASTRACK 0.4 mm x 18 mm (H x W) including adhesive Accuracy RTLC-S/RTLC ± C Linearity RTLC-S/RTLC ±2. µm/m achievable with two point error correction Thermal expansion RTLC-S/RTLC 10.1 ±0.2 µm/m/ C FASTRACK 10.1 ±0.2 µm/m/ C Temperature (system) Storage -20 C to +70 C Operating 0 C to +70 C Humidity (system) 9% relative humidity (non-condensing) to EN Shock (system) Vibration (system) Mass Minimum recommended length Non-operating 00 m/s 2, 11 ms, ½ sine, 3 axes Operating 300 m/s 2 to 2000 Hz, 3 axes RTLC-S 12.9 g/m RTLC 12.2 g/m FASTRACK 24 g/m FASTRACK 100 mm Maximum supplied length RTLC-S m = RTLC 10 m FASTRACK 2 m = For lengths >2 m FASTRACK with RTLC is recommended RTLC-S, RTLC and FASTRACK part numbers Scale type Length Reference mark Available in Part number separation increments of: (where xxxx is the length in cm) RTLC-S 100 mm to m 0 mm 0 mm A-971-xxxx RTLC 100 mm to 10 m 0 mm 0 mm A-970-xxxx FASTRACK 100 mm to 2 m N/A 2 mm* A-9704-xxxx *NOTE: Part numbers for FASTRACK lengths ending in 2 mm are: Part numbers for FASTRACK lengths ending in 7 mm are: A-9704-xxx3 A-9704-xxx8 6

7 Renishaw plc New Mills, Wotton-under-Edge, Gloucestershire GL12 8JR United Kingdom T +44 (0) F +44 (0) E uk@renishaw.com Accessories Reference and limit magnets Reference mark selector magnet (adhesive/bolted) Q limit switch actuator magnet (adhesive/bolted) P limit switch actuator magnet (adhesive/bolted) Magnet applicator device Datum clamp Adhesive datum clamp (RTLC-S only) Adhesive for datum clamp (Loctite 43) olted datum clamp (FASTRACK only) Setting gauge RTLC 1.9 mm setting shim (black) RTLC-S 2.1 mm setting shim (green) Separator kit (FASTRACK only) Centre section removal tool End cover End cover kit (FASTRACK only) End cover kit (RTLC-S only) Scale/track cutting jig Guillotine kit A /A A /A A /A A A P-AD A M M A A A A Compatible products RTLC/FASTRACK T103x RTLC/FASTRACK Installation guide M TONiC DOP Installation guide M TONiC Data sheet L TONiC DOP Data sheet L TONiC UHV Data sheet L VIONiC Data sheet L VIONiC RTLC and FASTRACK Installation guide M RTLC-S T103x RTLC-S Installation guide M TONiC DOP Installation guide M TONiC Data sheet L TONiC DOP Data sheet L TONiC UHV Data sheet L VIONiC Data sheet L VIONiC RTLC-S Installation guide M For worldwide contact details, please visit our main website at RENISHAW HAS MADE CONSIDERALE EFFORTS TO ENSURE THE CONTENT OF THIS DOCUMENT IS CORRECT AT THE DATE OF PULICATION UT MAKES NO WARRANTIES OR REPRESENTATIONS REGARDING THE CONTENT. RENISHAW EXCLUDES LIAILITY, 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. Loctite is a registered trademark of the Henkel Corporation Renishaw plc All rights reserved Issued 0716 *L *