E3 Optical Kit Encoder

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Overview

  • Quick, simple assembly and disassembly
  • Rugged screw-together housing
  • Accepts .010" axial shaft play
  • Small size
  • 64 to 10,000 cycles per revolution (CPR)
  • 256 to 40,000 pulses per revolution (PPR)
  • 2 channel quadrature TTL squarewave outputs
  • Optional index (3rd channel)

The E3 is a high resolution rotary encoder with a molded polycarbonate enclosure, which utilizes either a 5-pin locking or standard connector. This optical incremental encoder is designed to easily mount to and dismount...

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Product Specifications

ParameterValueUnits
Operating Temperature (CPR < 3600) -40 to 100 C
Operating Temperature (CPR ≥ 3600) -25 to 100 C
Vibration (5Hz to 2kHz) 20 G
Electrostatic Discharge, IEC 61000-4-2 ± 4 kV

 

ParameterValueUnits
Max. Shaft Axial Play ±0.010 in.
Max. Shaft Eccentricity Plus Radial Play (1) 0.004 in.
Max. Acceleration 250000 rad/sec²
Max. RPM (2) (CPR ≤ 2500)
e.x. CPR=2500, max. rpm=7200
e.x. CPR=100, max. rpm=60000		 minimum value of ((18 x 10^6) / CPR) and (60000) rpm
Max. RPM (2) (CPR > 2500 and ≤ 5000)
e.x. CPR=4096, max. rpm=5273
 (21.6 x 10^6) / CPR rpm
Max. RPM (2) (CPR > 5000)
e.x. CPR=10000, max. rpm=4320
 (43.2 x 10^6) / CPR rpm
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 (3) 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 (4)
  With E-option (3)
  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 mechanical degrees
Technical Bulletin TB1001 - Shaft and Bore Tolerances Download

(1) Position inaccuracy is proportional to shaft radial play.

(2) 60000 rpm is the maximum rpm due to mechanical considerations. The maximum rpm due to the module's 300kHz maximum count frequency is (18 x 10^6) / CPR.

(3) Only for shaft diameters < 0.472".

(4) Add 0.125" to all required shaft lengths when using M-option.

 

ParameterTorque
Hub Set Screw to Shaft 2-3 in-lbs
Cover (4-40 screws through cover into base) 2-4 in-lbs
Base to Mounting Surface 4-6 in-lbs
Base to Mounting Adapter Plate 4-6 in-lbs
Adapter Plate to Mounting Surface 4-6 in-lbs
Module to Base 3.5-4 in-lbs

A leads B for clockwise shaft rotation, and B leads A for counterclockwise rotation viewed from the cover/label side of the encoder.

  • Specifications apply over entire operating temperature range.
  • Typical values are specified at Vcc = 5.0Vdc and 25°C.
  • For complete details, see the EM1 and EM2 product pages.
ParameterMin.Typ.Max.UnitsConditions
Supply Voltage 4.5  5.0 5.5 V  
Supply Current   27 33 mA CPR < 1000, no load 
  54 62 mA CPR ≥ 1000 and < 3600, no load
  72 85 mA CPR ≥ 3600, no load
Low-level Output     0.5 V IOL = 8mA max., CPR < 3600
 
0.5 mA IOL = 5mA max., CPR ≥ 3600
  0.05
mA no load, CPR < 3600
  0.25
mA no load, CPR ≥ 3600
High-level Output 2.0     V IOH = -8mA max., CPR < 3600
2.0

V IOH = -5mA max., CPR ≥ 3600

4.8   V no load, CPR < 3600

3.5
V no load, CPR ≥ 3600
Output Current Per Channel -8   8 mA CPR < 3600
-5   5 mA CPR ≥ 3600
Output Rise Time   110   nS CPR < 3600
  50   nS CPR ≥ 3600
Output Fall Time   35   nS CPR < 3600
  50   nS CPR ≥ 3600
Pin Description
1 Ground
2 Index
3 A channel
4 +5VDC power
5 B channel

Note: 5-pin single ended mating connector is CON-C5 or CON-LC5

Index

Provides a single pulse per revolution.

E-option_3.jpg

E-option

The E-option provides a cylindrical extension to the cover allowing for longer shafts of up .670". This option is only for shaft diameters <.472".

H-option_1.gif

H-option

The H-option adds a hole to the cover for the shaft to pass through.

  • Shafts <=1/2", a 0.55" diameter hole is supplied.
  • Shafts >1/2", a 1.05" diameter hole is supplied.

M-option_1.gif

M-option

These adapter plates are for mounting to a 3" diameter bolt circle. 

T-option_1.gif

T-option

When mounting holes are not applicable, a pre-applied transfer adhesive mounting option is available.

Instructions: The T-option includes transfer adhesive with a peel-off backing on the encoder base. First, peel the paper backing from the transfer adhesive. Next, align the centering tool with the center hole on the non-adhesive side of the encoder base. Slide the base (adhesive side down) with the centering tool over the motor shaft and press firmly to form a solid bond between the encoder base and mounting surface. Remove the centering tool and continue with the standard assembly. You are required to use the centering tool with the T-option to ensure proper placement.

For Shafts Less Than or Equal To 0.394" (10mm):

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    1. Base Mounting

    Secure the base to the mounting surface using two or three screws (sold separately). If a centering tool is used, slip it over the shaft and into the center hole of the base. Tighten the mounting screws and then remove the centering tool.

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    2. Spacer Installation

    Place the spacer tool around the shaft, flat on the base.

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    3. Hub/Disk Assembly Installation

    Slip the hub over the shaft until it bottoms out against the spacer tool. Tighten the set screw with the hex wrench provided while pressing down on the hub. Remove the spacer tool.

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    4. Encoder Module Installation

    Orientate the module with the connector pins toward the top. Slide the module from front to back, being careful not to damage the disk. Stop when the two alignment pins on the base fit into the holes of the module. Secure with two 4-40 1/2" pan head screws (supplied).

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    5. Cover Installation

    Place the cover over the assembly and secure with the two 4-40 5/8" flat head screws provided.

For Shafts Greater Than 0.394" (10mm):

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    1. Base Mounting

    Secure the base to the mounting surface using two or three screws (sold separately). If a centering tool is used, slip it over the shaft and into the center hole of the base. Tighten the mounting screws and then remove the centering tool.

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    2. Spacer Installation

    Push the spacer tool onto the bottom section of the hub/disk assembly. Make sure the spacer tool snaps only on the lower part of the hub. Align hub set screws as shown in drawing.

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    3. Hub/Disk Assembly Installation

    Slip the hub over the shaft until it bottoms out against the spacer tool. Make sure the spacer tool clears the mounting screws on the base. Tighten both set screws with the hex wrench provided while pressing down on the hub. Remove the spacer tool.

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    4. Encoder Module Installation

    Orientate the module with the connector pins toward the top. Slide the module from front to back, being careful not to damage the disk. Stop when the two alignment pins on the base fit into the holes of the module. Secure with two 4-40 1/2" pan head screws (supplied).

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    5. Cover Installation

    Place the cover over the assembly and secure with the two 4-40 5/8" flat head screws (supplied).

1. Centering Tool

The centering tool is only included with the -3 packaging option. It has to be ordered separately for other packaging options.

Part #: CTOOL - (Shaft Diameter)
Description: This reusable tool provides a simple method for accurately centering the E3 base onto the shaft in order to promote concentricity and thus, higher accuracy. It is recommended for the following situations:

  • When using mounting screws smaller than #4-40.
  • When the position of the mounting holes is in question.
  • When using the 3-hole mounting pattern.
  • When using the T-option transfer adhesive.

Instructions: When mounting encoder base, slide centering tool down shaft until it slips into centering hole of encoder base. Tighten mounting screws, then remove centering tool.

2. Hex Tool

Depending on the order packaging option, either a hex driver or hex wrench is included.

Part #: HEXD-050
Description: Hex driver, 0.050" flat-to-flat for #3-48 or #4-48 set screws. Only included with -B or -1 packaging options.

Part #: HEXW-050
Description: Hex wrench, 0.050" flat-to-flat for #3-48 or #4-48 set screws. Only included with -2 or -3 packaging options.

3. Spacer Tool

A spacer tool is included for all packaging options.

Part #: SPACER-E3S
Description: For shafts ≤ 0.394"

Part #: SPACER-E3L
Description: For shafts 12mm - 1"

4. Screws

Screws for base mounting must be purchased separately. Screws for mounting the housing to the base are included.

Part #: SCREW-080-250-PH
Description: Pan Head, Philips #0-80 UNF x 1/4"
Quantity Required for Mounting: 3 per encoder

Part #: SCREW-256-250-PH
Description: Pan Head, Philips #2-56 UNC x 1/4"
Quantity Required for Mounting: 2 per encoder

Part #: SCREW-440-250-PH
Description: Pan Head, Philips #4-40 UNC x 1/4"
Quantity Required for Mounting: 2 per encoder

Title Date Description 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 T6

The 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

Product Description

Restriction of Hazardous Substances

The E3 is a high resolution rotary encoder with a molded polycarbonate enclosure, which utilizes either a 5-pin locking or standard connector. This optical incremental encoder is designed to easily mount to and dismount from an existing shaft to provide digital feedback information.    

The E3 is easy to add to existing applications and only consists of four main components; base, cover, hubdisk and optical encoder module.

The E3 is normally designed for applications of 10 feet or less. For longer cable lengths, adding a PC4 / PC5 differential line driver is recommended.

The base and cover are both constructed of rugged 20% glass filled polycarbonate. Attachment of the base to a surface may be accomplished by utilizing one of several machine screw bolt circle options. Positioning of the base to the centerline of a shaft is ensured by use of a centering tool (sold separately). The cover is securely attached to the base with two 4-40 flat head screws to provide a resilient package protecting the internal components.

The internal components consist of a mylar disk mounted to a precision machined aluminum hub and an encoder module. The hub is available for diameters up to 1". The module consists of a highly collimated solid state light source and monolithic phased array sensor, which together provide a system extremely tolerant to mechanical misalignments.

Connection to the E3 product is made through either a 5-pin locking or standard connector (sold separately). The mating connectors are available from US Digital� with several cable options and lengths.

Related
Product Notes
  • US Digital® warrants its products against defects in materials and workmanship for two years. See complete warranty for details.

Cable/connector assembly not included and must be ordered separately.

Related Products & Accessories

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1. CPR
2. Bore
3. Index


4. Cover



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6. Packaging




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For purchasing or volume discounts, please use the above part number and contact us at:

sales@usdigital.com or

800.736.0194 (Toll Free)
360.260.2468 (Local)