AMT303-V-1-1000-02 CUI Inc, AMT303-V-1-1000-02 Datasheet - Page 5

• Manufacturer Part Number: AMT303-V-1-1000-02
• Description: PROG ENCODER CW 1000PPR 2POLE
• Manufacturer: CUI Inc
• Series: AMT303r

Specifications of AMT303-V-1-1000-02

• Encoder Type: Capacitive
• Output Type: Binary (Absolute), Quadrature with Index (Incremental)
• Pulses Per Revolution: 1000
• Voltage - Supply: 5VDC
• Actuator Type: 2mm ~ 8mm Open Center
• Detent: No
• Built In Switch: No
• Mounting Type: Chassis Mount, Motors
• Orientation: Right Angle
• Termination Style: Terminal Pins
• Rotational Life (cycles Min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

cUI Inc
EncodER opERatIonal modE
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.
2.
3.
4.
AMT303 series demo board instructions can be found HERE.
Initialization mode:
tracking mode:
Mount the AMT303 series encoder to the motor.
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.
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.
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
SERIES: AMT303
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.
Pole Count
Speed Limit RPM
– At power up the encoder goes through an initiation and stabilization procedure. This includes
– 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
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.
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:
dEScRIptIon:
MODULAR ENCODER
4
17,361
6
11,574
cui.com
8
8,681
10
6,944
12
5,787
date 05/04/2011 page 5 of 6
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