SERIES: AMT303 date 05/04/2011 page 1 of 6 description: MODULAR ENCODER FEATURES •U, V, W commutation lines •small size 37 mm •line count up to 1024 PPR •optional line driver output (303LD) •single pulse index •capacitive ASIC technology •modular locking hub design for ease of installation •2, 4, 6, 8, 10, 12, or 20 pole motors •6 programmable functions •’One Touch’ commutation signal alignment RoHS ® ™ electrical parameter conditions/description power supply min nom max 4.5 5 5.5 V 8 10 mA current consumption commutation output signals U, V, W phase commutation pole 2, 4, 6, 8, 10, 12, 20 (software programmable) incremental output signals A, B, Z (AMT303) A, A, B, B, Z, Z (AMT303LD) incremental output waveform square wave incremental output resolutions 96, 192, 200, 250, 384, 400, 500, 512, 800, 1000, 1024 index one pulse per 360 deg. incremental output current output voltage - sourcing to +5 V at -32 mA output voltage - sinking to ground at -32 mA 3.8 conditions/description min units PPR 0.55 V V max units 360 deg. max units 125 °C 85 % 55 Hz mechanical parameter nom output range mounting options A) 2 x M1.6 on 16 mm (0.63”) bolt circle B) 2 x #4 on 19.05 mm (0.75”) bolt circle C) 2 x M1.6 or M2 on 20 mm (0.787”) bolt circle D) 3 x M1.6 or M2 on 20.9 mm (0.823”) bolt circle with washers in option B holes E) 3 x M1.6 or M2 on 22 mm (0.866”) bolt circle F) 4 x M1.6 or M2 on 25.4 mm (1”) bolt circle environmental parameter conditions/description min operating temperature -40 humidity vibration 1.5 mm, 3 directions, 2 hours 10 cui.com nom CUI Inc SERIES: AMT303 description: MODULAR ENCODER date 05/04/2011 page 2 of 6 PART NUMBER KEY For customers that prefer a specific AMT303 configuration, please reference the custom configuration key below. AMT303 - XX - XXXX - XXXX - XX - XX Base Number Output Signals: “blank” = A, B, Z, U, V, W LD = Line Driver A, A, B, B, Z, Z, U, V, W Direction: “blank” = CCW CW = clockwise Sleeve Bore Diameter: 2000 = 2 mm 3000 = 3 mm 3175 = 3.175 mm (1/8”) 4000 = 4 mm 4760 = 4.76 mm (3/16”) 5000 = 5 mm 6000 = 6 mm 6350 = 6.35 mm (1/4”) 8000 = 8 mm Resolution (ppr): 00960500 01920512 02000800 02501000 04001024 Motor Poles: 0210 0412 0620 08 AMT303 KITS In order to provide maximum flexibility for our customers, the AMT303 series is provided in kit form standard. This allows the user to implement the encoder into a range of applications using one sku#, reducing engineering and inventory costs. SLEEVES 8mm 1/4 inch (6.35mm) 6mm 5mm 3/16 inch (4.76mm) 4mm 1/8 inch (3.175mm) 3mm 2mm Blue Snow Red1 Green1 Yellow1 Gray60 Purple1 Orange Light Sky Blue ORDERING GUIDE AMT303XX-V TOOL A BASE TOP COVER Output Signals: “blank” = A, B, Z, U, V, W signals LD = Line Driver A, A, B, B, Z, Z, U, V, W signals cui.com TOOL C SHAFT ADAPTER CUI Inc SERIES: AMT303 description: MODULAR ENCODER date 05/04/2011 page 3 of 6 ENCODER INTERFACE PINOUT CONNECTOR 1 FUNCTION # 14 13 12 11 10 9 8 7 6 5 4 3 2 1 AMT303 GND_C N/A Z N/A A N/A B AMT303LD GND_C -Z Z -A A -B B V 5 V+ V 5 V+ W GND W GND U zero set N/A U zero set N/A B 13 11 9 7 5 3 1 14 12 10 8 6 4 2 DETAIL B SCALE 4 : 1 Demo Board Side Encoder Side 1' 0.25" (304.8) Samtec ISDF-07-D Demo Board Cable (Cable available without Demo Board Connector) cui.com 28 AWG 10 conductor 1.27 mm pitch CUI Inc SERIES: AMT303 description: MODULAR ENCODER date 05/04/2011 page 4 of 6 MECHANICAL DRAWING 10.34 0.407 R15.49 0.610 15.30 0.602 15.33 0.604 37.39 1.472 28.58 1.125 10.93 0.430 A (3 PLCS) 22.00 0.866 2.00 0.079 (4 PLCS) 21.45 0.844 R2.10 0.083 12.60 0.496 19.05 0.750 2.95 0.116 (2 PLCS) TOLERANCE: ±0.05mm UNLESS OTHERWISE SPECIFIED 1.70 0.067 (2 PLCS) 0.55 20.90 0.823 DETAIL A SCALE 4 : 1 25.48 1.003 16.00 0.630 18.60mm AMT303 COMM WWYY US Patent No. 6892590 SCALE 5:1 5.30mm 5.30mm 18.60mm R1.20mm AMT303LD COMM WWYY US Patent No. 6892590 SCALE 5:1 cui.com R1.20mm CUI Inc SERIES: AMT303 description: MODULAR ENCODER date 05/04/2011 page 5 of 6 ENCODER OPERATIONAL MODE Initialization mode: – At power up the encoder goes through an initiation and stabilization procedure. This includes microprocessor stabilization and the program for combining Coarse and Fine channel of the encoder for getting the absolute start position. This takes less than 0.1 seconds. Tracking mode: – MCU 12 bit position register is updated from Fine Asic every 48 μs. – The commutation program in the MCU has a compensation for the average delay caused by the update rate, leaving a remaining jitter of less than 24 µs RMS. •The communication jitter expressed in electrical degrees will be proportional speed and does not reach 6 deg RMS until the speed reaches the following values: Pole Count 4 6 8 10 12 20 Speed Limit RPM 17,361 11,574 8,681 6,944 5,787 3,472 COMMUTATION ALIGNMENT AND SETTING THE ZERO POINT We strongly recommend the use of the AMT303 series demo board to set commutation zero. It greatly simplifies and expedites the process. The demo board also allows setting of resolution, # of motor poles, direction of quadrature increment, and commutation angle offset (when required). If you do not have or cannot obtain a demo board, use the following procedure to align the AMT303XX commutation angle with your motor: 1. Mount the AMT303 series encoder to the motor. 2. Put the motor in a ‘locked rotor’ condition. This is usually done by applying +V to phase A and ground to phase B. Consult your motor manufacturer if you are not certain how to lock the rotor for commutation alignment. 3. With the motor in a locked rotor position, pull pin# 2 (zero set) low to write the rotor position into non-volatile memory in the encoder. 4. Power cycle the encoder, i.e., remove power from it. The commutation position is now permanently aligned with the motor rotor zero position and will use this offset at initialization every time at startup. Note: The procedure is based on the standard “WYE” motor phase connection configuration. If your motor uses other than the “WYE” phase connection, you must acquire the AMT303 series demo board to program the required offset to align encoder commutation signal zero with motor zero position. AMT303 series demo board instructions can be found HERE. cui.com CUI Inc SERIES: AMT303 description: MODULAR ENCODER date 05/04/2011 page 6 of 6 REVISION HISTORY rev. 1.0 description date initial release 05/04/2011 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Tualatin, OR 97062 800.275.4899 Fax 503.612.2383 cui.com [email protected] CUI offers a two (1) year limited warranty. Complete warranty information is listed on our website. CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use. CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.