ID4501G Dual Channel Gearwheel Encoder Module
4Pages

ID4501G Dual Channel Gearwheel Encoder Kit Product data Features • Highly miniaturized gear encoder • Differential inductive sensing principle • Insensitive to magnetic interference fields • Robust against oil, water, dust, particles • Programmable resolution and maximum speed • Optional with cable, connector and holder Applications • Speed and position control in high-speed spindles • Industrial / laboratory / office automation • Milling, grinding and cutting spindles • Rotating equipment • High-speed motion control • Mechatronics applications Key Specifications Description The ID4501G incremental encoder kit consists of an encoder and a gearwheel (Fig. 1). The encoder is an integrated circuit in a PCB housing in SMD-format. It provides incremental A and B output signals in quadrature (Fig. 2). The gearwheel is in ferromagnetic steel and has a module 0.5. The orientation of the encoder is selected in Table 1. Resolution, maximum speed and airgap The resolution and the maximum speed of the encoder are user-programmable or can be programmed ex-factory. The resolution depends on a filter setting that limits the maximum speed of the encoder vs. the scale. The resolution also depends on the maximum distance between the encoder and the scale. The resolution and maximum speed for a certain maximum air-gap are selected in Tables 2 and 3. Gearwheels Gearwheels should be made of ferromagnetic steel and have a module 0.5. Gearwheels with 12 up to 120 teeth are available and can be selected in Table 5. Encoder assembly The encoder can be assembled by reflow soldering on a rigid or flexible PCB. Optimum performances are obtained by following the recommended schematic (Fig. 5) and footprint (Fig. 6). In particular, there should be no copper traces or metal objects behind the encoder up to a distance of 3 mm in order to avoid any influence on the measured position. If this is not possible, a blank copper layer behind the encoder (rear-side of the PCB) may be envisaged and/or a linearization using the on-chip look-up table (LUT). Encoder holder The encoder holder type A is available (Fig. 7) and can be selected in Table 6. It includes the encoder and the external components according to the recommended schematic (Fig. 5). The encoder holder can be mounted on any substrate using 4 screw holes. Encoder cable and connector The encoder on holder can be supplied with a flat cable of pitch 1.27 mm and a connector (Fig. 7). The cable length and the connector type are selected in Tables 7 and 8. Encoder programming The Evaluation and Programming Tool (EPT) including an interface board and the ASSIST software is available for the linearization and programming of the encoder. 3D models of encoder and holder STEP models are available on www.posic.com.

Recommended Operating Conditions Linearity For high-resolution high-precision applications, it is possible to linearize the encoder by means of a Look-Up Table (LUT) that is located inside the encoder. The LUT can be programmed in volatile or in non-volatile memory by means of the Evaluation and Programming Tool (EPT) or it can be pre-programmed by POSIC. The LUT option is selected in Table 4. 0 = Phase P = Pulse width Definitions Airgap Cycle °e Phase shift O Fig. 2 Encoder output signals A and B in quadrature. Distance between encoder and gear in Z-direction. See Fig. 1. One A quad B...

Encoder center” must be centered with respect to the width of the gear. Dimensions (mm) and connector pin-out of encoder on holder type A with flat cable (pitch 1.27 mm) and 8-pin DIN41651 connector.

BB Maximum speed Table 2 D Look-Up Table Table 4 EEEEE Codewheel Table 5 F Encoder holder Table 6 Table 1: Orientation. Arrows indicate direction of move _ ment of the scale with rising edge A prior to B. Table 2: . Maximum input frequency © Copyright 2017 POSIC. All rights reserved. No part of this document may be reproduced without the prior written consent of POSIC. Products and companies mentioned in this document may be trademarks or registered trademarks of their respective owners. Information in this document is believed to be accurate and reliable and may be changed without notice....