Brushless Motors

Optical Encoders

Optical Encoders

All motors can be fitted with an encoder. We use the Hewlett-Packard HEDS and HEDM series of optical encoders as the standard offering. Other encoders are available.

Features

Two channel quadrature output with optional index pulse
No signal adjustment required
Low cost
Small size
Resolutions up to 1024 counts per revolution
-40°C to 100°C operating temperature
TTL compatible
Single 5 volt supply

Benefits

Feedback information may be used in conjunction with a position controller for precise motor shaft position
Encoders used in conjunction with a 4-quadrant velocity controller, such as the BDA-Q4-70-10, allow precise velocity control
of brushless motors

Specifications at 25°C (77°F)	HEDS 5500	HEDS 5540	HEDM 5500
Counts Per Revolution	96 to 512	96 to 512	1000 to 1024
Number of Channels	Two	Two + Index	Two
Supply Voltage (Vcc) (vdc)	4.5 to 5.5	4.5 to 5.5	4.5 to 5.5
Supply Current (Icc) (mA – typical)	17	17	17
Load Capacitance (CL) (pF max)	100	100	100
Count Frequency (f) (kHz max)	100	100	100
Pulse Width (P) (°e)	180 +/- 45	180 +/- 45	180 +/- 45
Phase Shift (φ) (°e)	90 +/- 20	90 +/- 20	90 +/- 20
Pulse Width Error (ΔP) (°e max)	45	35	45
Index Pulse Width (Po) (°e max)	N/A	125	N/A
Signal Rise Time (tr) (ns typ.)	200	180	180
Signal Fall Time (tf) (ns typ.)	50	40	40
Operating Temperature (°C)	-40 to 100	-40 to 100	-40 to 100
Velocity (rpm) (max.)	30000	30000	30000
Acceleration (rad/sec2) (max)	250000	250000	250000

We also offer the Renco RCML15 as a standard. Follow the hyperlink below to see detailed specifications.

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Typical Applications

Factory automation
Packaging and printing products
Office equipment and computer peripherals
Robotic tape storage and retrieval
Semiconductor handling and insertion machines
Industrial automation
Computer controlled embroidery machines
Positioning tables
Machine tools

Optical Encoder Technical Data Sheet

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