Miniature linear encoders are ultra-compact

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Miniature linear encoders are ultra-compactMclennan Servo Supplies, the exclusive UK distributor for Numerik-Jena, is introducing a new range of miniature linear incremental encoders for space-restricted applications. With a selection of accuracy classes to +/-1um, and with resolution from 0.05-5.0um, the LIK 41 range features a finger-tip sized optical scanning head and is available with a choice of 8mm wide self-adhesive graduated steel tape scales based upon Numerik's Singleflex and Doubleflex standard, with measuring lengths up to 1000mm. A glass substrate scale version is also available for measuring lengths to 100mm.

The LIK 41 series scanning head measures 24mm long x 11mm wide x 6mm deep and has a mass of just 3.0g. An integral 3.7mm diameter cable, up to 3m long, is terminated in a 15-pin D-sub connector that includes all signal processing and interpolation electronics using the standard RS422, 1Vpp format. A choice of sinusoidal or square wave signal output with up to 100x interpolation is available. Maximum scanning frequency is 500kHz with an operational temperature range of zero to +55degC.

Numerik graduated scale steel tapes have a durable polished finished that is resistant to abrasion and corrosion; they are easily assembled to customers' equipment using simple but effective self-adhesive fixing. Singleflex versions are used for measurements where the machine element has a coefficient of expansion equal to steel. For fixing to other materials, the Doubleflex version includes a second steel strip with a flexible layer of adhesive material sandwiched between. The intermediate layer forms a stable bond and allows differential expansion to take place without affecting the measuring standard. Both types of tape can include reference marks for machine datum and homing. The Singleflex version can attain +/-1.0um accuracy grades and the Doubleflex version from +/-2um – the lowest accuracy class is +/-5um.

Mclennan covers the full range of Numerik linear and rotary encoders, which are available in kit form, as separate reading head and scale versions or as completely sealed, self-contained measuring systems suited to harsh environmental conditions. Across the range of linear encoders, measuring ranges up to 10m are available, with the best accuracy grade to +/-1.0um and resolution to 0.05um. Rotary encoders include optical grating disks in diameters up to 210mm with separate reading heads offering extremely high angular accuracies with high repeatability.

Numerik encoders are found in high-precision measurement and position feedback applications in automation, robotics, metrology and motion control applications. Mclennan Servo Supplies provides complete sales and technical support for the range.

07 April 2009

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