cui.com

date 10/13/2015

│ page 2 of 10

CUI Inc

│ SERIES: AMT31 │ DESCRIPTION: MODULAR COMMUTATION ENCODER

WAVEFORMS

Z

A

B

I

P

T

S S S S

Quadrature signals with index showing

counter-clockwise rotation

Figure 1

Parameter Description Expression

Units

T

period

360/R

mechanical degrees

P

pulse width

T/2

mechanical degrees

I

index width

P/2

mechanical degrees

S

A/B state

width

P/2

mechanical degrees

The following parameters are defined by the resolution selected

for each encoder, where R = resolution.

Z

U

V

W

I

P

C

T

S S S S S S

Commutation signals with index (The programmable

direction setting dictates in which direction of

rotation U will lead V, and V will lead W)

Figure 2

Parameter Description Expression

Units

T

period

720/M

mechanical degrees

P

pulse width

T/2

mechanical degrees

I

index width

90/R

mechanical degrees

S

U/V/W state

width

60

electrical degrees

T/6

mechanical degrees

C

phase

spacing

120

electrical degrees

T/3

mechanical degrees

The following parameters are defined by the resolution and pole

count selected for each encoder, where R = resolution and M =

pole.

MECHANICAL

parameter

conditions/description

min

typ

max

units

motor shaft length

9

mm

weight

weight varies by configuration

15.7

g

axial play

±0.3

mm

rotational speed (at each

resolution)

48, 96, 100, 125, 192, 200, 250, 256, 384, 400,

500, 512, 800, 1000, 1024, 2048

8000

RPM

768, 1600, 2000, 4096

4000

RPM

ENVIRONMENTAL

parameter

conditions/description

min

typ

max

units

-40

105

°C

humidity

non-condensing

85

%

vibration

10~500 Hz, 5 minute sweep, 2 hours on each XYZ

5

G

shock

3 pulses, 6 ms, 3 on each XYZ

200

G

RoHS

2011/65/EU

Note:

1. Encoders with operating temperature of -40~125°C are available as a custom order

SERIAL INTERFACE

parameter

conditions/description

min

typ

max

units

protocol

serial UART

controller

driven by onboard Microchip PIC18F25K80. See

Microchip documentation for additional details.

data rate

8 data bits, no parity, 1 stop bit, least significant

bit first

115200

baud

For more information, please visit the product page.