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VOLUME -25 NUMBER 8
Publication Date: 08/1/2010
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Special Features: Test and Measurement
Product Preview: AATE/IPC Midwest
August 2010 Issue
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Renishaw: Track-Mounted Linear Encoder Scale
Linear encoder scale.
Hoffman Estates, IL — Renishaw's new FASTRACK linear encoder scale system brings high accuracy, stainless steel construction and quick, easy installation to large, sectional machines used in flat-panel display and photovoltaic manufacturing applications, as well as large CMMs that require removal of the scale for transit. The encoder is also suitable for linear motors with aluminum substrates, and applications where thermal expansion of the scale must be independent of the machine structure, or those involving dissimilar axis materials, the track-mounted scale can run across gaps up to 25mm wide, while providing ±5µm/m accuracy.
The system consists of two miniature guide rails that secure low-profile scales (8 x 0.2mm cross-section) while allowing them to freely expand at their own thermal expansion rate with almost zero hysteresis. The scale can be installed, removed and reinstalled as many times as required, and damaged scales can be pulled out of the guide rails and quickly replaced, even where access is limited, reducing machine downtime.
The encoder scales are available on reels for cut-to-length flexibility at the point of installation, allowing machine builders to minimize stock and lead-times. Generous tolerance makes measuring and cutting quick and easy. Easily installed, the self-adhesive guide rails have integral pre-aligned sacrificial spacers which are removed after the rails are fitted to the axis. The scale is then fed in from either end and locked to the substrate at a single datum point anywhere along the axis using cyanoacrylate glue or a clamp. Part of a modular solution, FASTRACK can be used with either the RTLC stainless steel incremental scale and super-compact TONiC readhead, or the company's new RESOLUTE linear absolute encoder and RTLA absolute scale. The encoders in both setups have advanced optoelectronics with resolutions to 1nm, low sub-divisional error (SDE) and very low jitter for smooth velocity control and rock-solid positional stability. For TONiC RTLC incremental scale installations, limit magnets and a reference mark selector are fitted to the FASTRACK and secured with a bolted clamp rather than using glue. The RTLC scale has multiple INTRAC reference marks at regular spacing.
Contact: Renishaw, Inc., 5277 Trillium Boulevard, Hoffman Estates, IL 60192
847-286-9953 fax: 847-286-9974 E-mail: Susan.email@example.com Web:
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