CUI DEVICES | SERIES: AMT20 | DESCRIPTION: MODULAR ABSOLUTE ENCODER

date 08/05/2022 | page 2 of 10

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MECHANICAL

parameter

conditions/description

min

typ

max

units

motor shaft length

9

mm

motor shaft tolerance

NOM +0/-0.015

mm

weight

15.7

g

axial play

±0.3

mm

rotational speed

8000

RPM

ENVIRONMENTAL

parameter

conditions/description

min

typ

max

units

operating temperature

-40

125

°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

yes

SERIAL INTERFACE

parameter

conditions/description

min

typ

max

units

protocol

Serial Peripheral Interface (SPI)

controller

SPI driven by onboard Microchip PIC16F6901

data rate3

1

MHz

Note:

3. See Microchip documentation for additional details.

WAVEFORMS

X

A

B

I

P

T

S S S S

Quadrature signals with index showing

counter-clockwise rotation

Figure 1

Parameter

Description

Expression

Units

Notes

PPR

resolution

Pulses Per Revolution

This is the user selected value and the format

all resolutions are listed in

CPR

counts

PPR x 4

Counts Per Revolution

This is the number of quadrature counts the

encoder has

T

period

360/R

mechanical degrees

P

pulse width

T/2

mechanical degrees

S

A/B state width

T/4

mechanical degrees

This is the width of a quadrature state

I

index width

T/4

mechanical degrees

The width of a once per turn index is the state

width for A & B lines

The following parameters are defined by the resolution selected for each encoder. The encoders resolution is listed as Pulses Per

Revolution (PPR), which is the number of periods (or high pulses) over the encoders revolution.

Note:

For more information regarding PPR, CPR, or LPR (Lines Per Revolution) view https://www.cuidevices.com/blog/what-is-encoder-ppr-cpr-and-lpr

Additional Resources: Product Page | 3D Model