Linear Encoders Piezo LEGS® linear motors are capable of extreme resolution, down to the sub-nanometer range. Position encoders are required to build a system with high repeatability and accuracy. PiezoMotor offers linear encoders from Renishaw and from MicroE Systems. Both companies are supplying very high quality, top of the line encoders. Encoders of two different resolutions from each company are kept in stock at PiezoMotor. They are offered as an add-on to the motor purchase, complete with cables, instructions, drawings and CAD files, giving the customer an easy integration. Common features to all encoders: • Non-contact optical encoders • Quadrature interface – A/B and index • Compatible with all PiezoMotor microstepping drivers Selection With high resolution motors it is important to exercise great care in selecting the appropriate encoder, and even more important – the correct encoder location. The rule of thumb is to place the encoder as close as possible to the point of interest. This will minimize issues like thermal drift in the mechanical structure. Experts at PiezoMotor are available regarding design and selection questions. System design To make a complete closed loop motion system a number of key components are required: Piezo LEGS® linear motor Piezo LEGS® microstep driver Linear guide (roller bearing) Encoder Scale, with/without index mark Cabling Installation Guideline In a closed loop system, the motor, encoder and driver act together to move an object to a given target position. Accuracy of the position is given by the accuracy of the sensor. With the high resolution motor, Piezo LEGS®, it is possible to regulate to a position within ±1 sensor count. The total system accuracy is depending on where the sensor is mounted, how it is mounted and of course the mechanical stability and thermal behavior of the complete assembly.

Linear Encoders Ordering information Readhead and interpolator Driver Connector Cable RGSZ20 Gold Scale with IN-TRACK index mark length = 100 mm index mark in center 10 mm magnet, north pole facing 10 mm magnet, north pole facing Tape scale end clamps (2 pcs) For product data sheet, installation manual, CAD models, go to: www.piezomotor.com

Linear Encoders Ordering information Readhead and interpolator Driver Connector Cable PurePrecision™ Laser Tape Scale Set of 4 pairs of limit markers Tape scale end caps (2 pcs) SmartPrecision Alignment Tool with power supply of European standard SmartPrecision Alignment Tool with power supply of US standard For product data sheet, installation manual, CAD models, go to: www.piezomotor.com

Mechanical Installation Links to the manufacturer manuals can be found at www.piezomotor.com. The documentation provides information about the correct mounting of the encoder and encoder scale. The mechanical design and the location of the sensor is very important. For example, 10 mm of steel (with thermal expansion coefficient of 12·10-6 ºC-1) located between the sensor position and the position of interest will introduce an error due to thermal drift of 1.2 µm for a 10°C temperature change. With a high resolution Piezo LEGS® motor, it is possible to continuously operate in closed loop correcting...