Calibration Process; Auto Calibration - Broadcom HEDS-9922PRGEVB User Manual

HEDS-9922PRGEVB
HEDS-9922EVB User Guide

Calibration Process

When the encoder is assembled (SMT) to PCB, mount to the motor system with the magnet setup per the data sheet.
Encoder configuration can be loaded before or after calibration.

Perform auto-calibration followed by zero reset.

Auto-Calibration
1. Rotate the magnet at a constant-speed (any direction).
a. Constant speed range is between 50 RPM to 2000 RPM.
2. When the speed stabilizes, initiate the calibration sequence by using the following items:
a. Software
i. SPI commands using the PC software interface.
ii. Calibration status is displayed when complete.
b. Hardware
i. Send High pulse > 50 ms to I/O pin M1.
ii. Calibration status is displayed on the ABI pin.
3. Calibration data is automatically saved in memory at the end of the sequence.
Zero Reset Calibration
1. Stop the magnet at the reset position.
2. Initiate the reset calibration sequence by using the following items:
a. Software
i. SPI commands using the PC software interface.
ii. Calibration status is displayed when complete.
b. Hardware
i. Send High pulse > 50 ms to I/O pin M2.
ii. Calibration status is displayed on the ABI pin.
3. Calibration data is automatically saved in memory at the end of the sequence.
NOTE: For a detailed description of each of the parameters, refer to the data sheet and application note.
Broadcom
Magnetic Encoder IC Programming Kit Evaluation Board
HEDS-9922-UG101
10