E3 Optical Kit Encoder

Please see the EM1 Component Change Notice.
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  • E3 Optical Kit Encoder
  • E3 Optical Kit Encoder
  • E3 Optical Kit Encoder

Overview

  • Quick, simple assembly and disassembly
  • Rugged screw-together housing
  • Accepts .010" axial shaft play
  • Tracks from 0 to 300000 cycles/sec
  • Small size
  • 64 to 2500 cycles per revolution (CPR)
  • 256 to 10,000 pulses per revolution (PPR)
  • 2 channel quadrature TTL squarewave outputs
  • Optional index (3rd channel)
  • -40 to +100C operating temperature

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...

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Product Specifications

ParameterValueUnits
Operating Temperature -40 to 100 C
Vibration (5Hz to 2kHz) 20 G
Electrostatic Discharge, Human Body Model ± 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)
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
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 ± 5 mechanical degrees

(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 product page.

ParameterMin.Typ.Max.UnitsConditions
Supply Voltage 4.5 5.0 5.5 V
Supply Current   27 30 mA CPR < 1000, no load 
  55  57 mA CPR ≥ 1000, no load 
Low-level Output     0.5 V IOL = 8mA max.
High-level Output 2.0     V IOH = -8mA max.
4.2 4.8   V no load
Output Current Per Channel -8   8 mA
Output Rise Time   110   nS  
Output Fall Time   35   nS  
Pin Description
1 Ground
2 Index
3 A channel
4 +5VDC power
5 B channel

Index

Provides a single pulse per revolution.

3-option_4.gif

3-option

3-option makes all five of these hole diameters .125". The .438" diameter center hole can mate with a motor boss for alignment. If a motor boss is lacking, a centering tool is usually required to mount the base in proper position to the shaft.

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. Use two 4-40 x 1/4" screws (sold separately) to attach the E3 base to the plate. Comes attached when ordered with encoder.

T-option_1.gif

T-option

When mounting holes are not available, a pre-applied transfer adhesive (with peel-off backing) is available for "stick-on" mounting. Use the centering tool (sold separately) to slide the base into position. T-option specifies transfer adhesive on the standard mounting base.

Instructions: To use transfer ahesive, peel off paper backing and slip tool into center hole of the base and slide both down shaft as one piece. Press to form a good bond, then slip tool off and continue with the standard mounting instructions. A centering tool is highly recommended when using transfer adhesive.

For Shafts Greater Than 0.394" (10mm):

  • largestep1.gif
    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.

  • largestep2.gif
    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.

  • largestep3.gif
    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.

  • largestep4a.gif
    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).

  • largestep5.gif
    5. Cover Installation

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

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

  • smallstep1.gif
    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.

  • smallstep2.gif
    2. Spacer Installation

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

  • smallstep3.gif
    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.

  • smallstep4a.gif
    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).

  • smallstep5.gif
    5. Cover Installation

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

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-265
Description: For shafts ≤ 0.394"

Part #: SPACER-260
Description: For shaft sizes 0.5" or 12mm

Part #: SPACER-555
Description: For shafts ≥ 0.551"

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, Cross Drive #0-80 UNF x 1/4"
Quantity Required for Mounting: 3 per encoder

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

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

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, hub/code wheel 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 shatterproof 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.

Purchasing

Configure and Purchase

1. CPR
2. Bore
3. Index


4. Cover



5. Base




6. Packaging




Product Part Number

This product requires configuration. Please supply the product options above.

Please configure your product for 3D model downloads.

Quantity Base Price
1 $61.95
10 $54.93
50 $49.25
100 $45.83
Over 100 Call for quote
Quantity
Unit Price

$61.95

Subtotal

$61.95

For your convenience, use the above part number to order via phone 800.736.0194

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