 | TONiC™ RELM linear encoder systemCombining all the benefits of the TONiC readhead with the outstanding metrology of Invar® RELM scale, for very high performance encoder feedback. Resolutions to 1 nm and ±1 µm certified accuracy. 'Zero' coefficient of thermal expansion. Low noise to 0.5 nm RMS.  The RELM high accuracy scale offers high speed, non-contact performance, combined with advanced features including dynamic signal processing and the IN-TRAC™ auto-phase optical reference mark. RELM is extremely robust yet offers a level of performance previously available only from more delicate fine pitch encoder systems. With ±1 µm accuracy, low coefficient of thermal expansion and resolution to 1 nm, RELM satisfies the most demanding precision motion requirements.
The system comprises: - RELM 20 µm pitch Invar spar scale
- TONiC T1000 readhead
- Ti analogue or digital interface
RELM 20 µm pitch Invar scale 20 µm pitch RELM scale is manufactured from Invar, a low expansion nickel/iron alloy. The robustness of Invar permits a much smaller cross section than glass scale, yet allows easier handling and installation, without risk of breakage.
- Available in defined lengths with custom lengths available on request
- Accuracy is individually certified to ±1 µm, calibrated against International Standards
- Low coefficient of thermal expansion: Invar, ~0.6 µm/m/°C (0°C to 30°C)
- IN-TRAC auto-phase optical reference mark, bi-directionally repeatable even at maximum system speed (10 m/s)
- Mid-point (RELM) and end (RELE) reference mark positions available as standard
- Customer positioned magnetic dual limits provide end of travel indication
- Easy to install, direct to the substrate, using datum clamp and clips or adhesive backing tape
TONiC T1010 readhead & Ti interface features and benefits Cyclic error of typically ±30 nm, offering ‘fine pitch' encoder performance- Compact dimensions - 10.0 mm x 35.0 mm x 13.5 mm (H x L x W)
- Excellent signal stability in conditions unsuitable for most open optical encoders
- User selectable gain control (AGC) maintains 1 Vpp analogue signal amplitude
- Capable of operation up to 10 m/s and 70 °C
- New! Low noise (jitter) filtering optics for improved positional stability
- Industry standard analogue and digital outputs
- Integral LEDs on readhead and interface for optimum set-up and system diagnosis
- High flex UL approved cable – up to 10 m between readhead and interface
- Fully RoHS compliant
Technical specifications| Readhead dimensions | 10.0 mm x 35.0 mm x 13.5 mm (H x L x W) |
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| Outputs (resolution) | RS422: 5 µm, 1 µm, 0.5 µm, 0.2 µm, 0.1 µm, 50 nm, 20 nm, 10 nm, 5 nm, 1 nm
Analogue: 1Vpp
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| Reference mark | IN-TRAC auto-phase optical |
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| Limit switches | Customer positioned magnetic dual limits (available on linear scale only) |
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| Maximum speed | 10 m/s |
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| Ride height tolerance | 2.1 ±0.15 mm |
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| Scale types | RELM Invar spar scale (also available with linear RGSZ gold tape scale, RSLM stainless steel linear, and RESM and REXM rotary) |
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| Vacuum compatible | No |
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