E3 Motor Encoder

Operating Temperature, CPR < 2000

-40 to 100

C

Operating Temperature, CPR ≥ 2000

-25 to 100

C

Electrostatic Discharge, IEC 61000-4-2

± 4

kV

Vibration (10Hz to 2kHz, sinusoidal)

20

G

Shock (6 milliseconds, half-sine)

75

G

Max. Shaft Axial Play

±0.010

in.

Max. Shaft Runout

0.004 T.I.R.

in.

Max. Acceleration

250000

rad/sec²

For CPR ≤ 2500:
Max. RPM (1)
Max. A/B Frequency
e.x. CPR=2500, Max. RPM=7200
e.x. CPR=100, Max. RPM=60000

minimum value of ((18 x 10^6) / CPR) and (60000)
300

RPM
kHz

For CPR = 3600, 4000, 4096, 5000:
Max. RPM (1)
Max. A/B Frequency

(21.6 x 10^6) / CPR
360

RPM
kHz

For CPR = 7200, 8000, 8192, 10000:
Max. RPM (1)
Max. A/B Frequency

(43.2 x 10^6) / CPR
720

RPM
kHz

Typical Product Weight

1.28

oz.

Codewheel Moment of Inertia

8.9 x 10^-5 for bore < 12mm
4.0 x 10^-4 for bore ≥ 12 mm

oz-in-s²

Hub Set Screw

#3-48 or #4-48

Hex Wrench Size

0.050

in.

Encoder Base Plate Thickness

0.135

in.

3 Mounting Screw Size

#0-80

3 Screw Bolt Circle Diameter (2)

0.823 ± 0.005

in.

2 Mounting Screw Size

#2-56 or #4-40

2 Screw Bolt Circle Diameter

0.750 ± 0.005

in.

2 Screw Bolt Circle Diameter

1.280 ± 0.005

in.

2 Screw Bolt Circle Diameter

1.812 ± 0.005

in.

Required Shaft Length (3)
  With E-option (2)
  With H-option

0.445 to 0.525
0.445 to 0.670
> 0.445

in.
in.
in.

Index alignment to hub set screw

180 ± Typical

degrees

Hub Set Screw

2-3

in-lbs

Cover Screw

2-4

in-lbs

Base Mounting Screw (#0-80)

1-2

in-lbs

Base Mounting Screw (#2-56)

2-3

in-lbs

Base Mounting Screw (#4-40)

4-6

in-lbs

Adapter Plate Mounting Surface (#2-56 screws)

2-3

in-lbs

Adapter Plate Mounting Surface (#4-40 screws)

4-6

in-lbs

Module Mounting Screw

3.5-4

in-lbs

Supply Voltage

4.5

 5.0

5.5

V

Supply Current

27
54
72

33
62
85

mA
mA
mA

CPR < 1000, no load 
CPR ≥ 1000 and < 3600, no load
CPR ≥ 3600, no load

Low-level Output

0.05
0.25

0.5
0.5

V
mA
mA
mA

I_OL = 8mA max., CPR < 3600
I_OL = 5mA max., CPR ≥ 3600
no load, CPR < 3600
no load, CPR ≥ 3600

High-level Output

2.0
2.0

4.8
3.5

V
V
V
V

I_OH = -8mA max., CPR < 3600
I_OH = -5mA max., CPR ≥ 3600
no load, CPR < 3600
no load, CPR ≥ 3600

Output Current Per Channel

-8
-5

8
5

mA
mA

CPR < 3600
CPR ≥ 3600

Output Rise Time

110
50

nS
nS

CPR < 3600
CPR ≥ 3600

Output Fall Time

35
50

nS
nS

CPR < 3600
CPR ≥ 3600

1

Ground

2

Index

3

A channel

4

+5VDC power

5

B channel

E3 and E6 Packaging Option Changes - PCN 7357

2/21/2024

As part of our ongoing continuous improvement efforts, US Digital is implementing a change to the packaging options for our E3 and E6 encoders. We will now include a centering tool with all packaging options. We are implementing this change to ensure that the encoder is properly assembled using the tools as designed, as per our assembly instructions. A centering tool is needed to properly center the encoder base to the mounting surface. By including the centering tool, customers will no longer need to purchase them separately.

Download

E3 Base Mold Update - PCN 6804

1/24/2019

As part of our ongoing continuous improvement efforts, and in order to enhance both function and appearance, multiple improvements are being incorporated into a plastic component redesign.The plastic base mounting holes and center hole counter-bore are increasing in size, and the four press-fit threaded inserts are being replaced with thread inserts that are over-molded into the base.With exception of the features outlined below, the new parts are dimensionally equivalent and will fit within the same envelope of the previous parts.

Download

2" Hub/Disk Assembly Screw Change - PCN 6644

9/27/2018

As part of our ongoing continuous improvement efforts, the screws used in the assembly of the 2" hub/disk assembly, that is with a bore of 12mm and larger, will be changed from a black oxide to a zinc plated screw.The zinc plating improves corrosion resistance as well as alleviates any potential for oil residue.The plating change has no effect on form, fit or function of our hubdisk assembly.

Download

Update to 1" and 2" Disks - PCN 6232

5/24/2018

This notice is to inform our customers of a minor disk design modification that is being implemented for standard 1" and 2" disks. This is a continuation of a change that was implemented for our index disks in 2015.We are revising the text on the disk, adding the US Digital logo and a line that is used internally by our manufacturing group.The change does not affect the quadrature or index tracks; therefore, it has no impact on form, fit or function.

Download

Hub Set Screw Production Change - PCN 5367

7/20/2015

As part of our ongoing continuous improvement efforts, US Digital is implementing a change related to the production of our 5/16" (.313), 8mm (.315), 3/8" (.375), and 10mm (.394) HUBDISK assemblies. We are adding a low strength threadlocker to the set screw during our assembly process to assist in securing the set screw in the hub during transportation. This will aid in the set screw retention of these specific hub sizes; ensuring the retention is sufficient and avoid the potential of them backing out of the hub assembly during transit. This change does not affect form, fit or function.

Download

Laser Marking - PCN 5253

6/17/2015

As part of our ongoing continuous improvement efforts, US Digital is changing the labeling/marking method for our E3, E6, H3, H6, S1, S2 and S6 products.

Download

EM1 & EM2 Update - PCN 4199

1/14/2014

Based on our continuous process improvement program, US Digital is changing the current marking method for our EM1 and EM2 encoder modules to a serialization method. This change will allow for each module to have a unique code; the current marking method is based on a date code system that includes all encoder modules produced within a specific week / year. The serialization system will be based on a hexadecimal system.

Download

EM1 LED Die - PCN 1016

2/7/2013

As part of US Digital's continual assurance of supply strategy, we have qualified additional sources for our LED die used in our EM1 encoder module, which in turn impacts all of the following products:EM1, E2, E3, E5, E6, H1, H15, H3, H5, H6, HB5M, HB6M, HD25, PE, S1, S2, S5, S6, T5 and T6The device specification will remain the same, i.e. there will be no change to form, fit or function of the product(s) as specified by US Digital. The appropriate quality and reliability testing has been performed on representative products to ensure normal parametric distribution, consistent with US Digital's quality and reliability standards.

Download