E8P OEM Optical Kit Encoder

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  • E8P OEM Optical Kit Encoder
  • E8P OEM Optical Kit Encoder
  • E8P OEM Optical Kit Encoder

Overview

  • Subminiature size, easy installation
  • Single-ended or differential output option
  • A and B quadrature TTL outputs
  • Fits shaft diameters from 0.118" (3mm) to 0.276" (7mm)
  • Accepts +/- 0.020" axial shaft play
  • Off-axis mounting tolerance of 0.010"
  • Count frequency from DC to 60 kHz
  • 180 to 512 cycles per rev (CPR)
  • 720 to 2048 quadrature states per rev.
  • Single +5V supply

The E8P optical incremental kit encoder is designed for high volume, low cost, mid-resolution OEM motion control applications. The E8P is small enough for a NEMA...

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Product Specifications

ParameterMin.Max.Units
Vibration (5Hz to 2kHz) - 20 G
Relative Humidity - 90 %
Storage Temperature -40 100 C
Operating Temperature -20 100 C
ESD (Human Body Model JESD22-A114-A
Class 2)		   3 kV
ESD (Machine Model JESD22-A115-A
Class B)		   300 V

 

ParameterValueUnits
Moment of Inertia 1.81 x 10-5  oz-in-s2
Required Shaft Length
  With D-Cover option
  With H-Cover option
0.385" to 0.400"
>=0.385"
in.
in.
Mounting Screw Torque (-D, -M option) 2-3 in.-lbs
Shaft Axial Play ± .020 in.
Off-axis Mounting Tolerance ± .010 in.
Shaft to Mounting Surface Perpendicularity 90 ± 1 deg.
Acceleration 250000 max. rad/sec²
Maximum RPM (1)
e.x. CPR = 720, max. rpm = 5000
e.x. CPR = 180, max. rpm = 20000		 minimum value of
(3600000/CPR)
and (60000)		 rpm

(1) 60000 rpm is the maximum rpm due to mechanical considerations. The maximum rpm due to the module's 60kHz maximum count frequency is (3600000/CPR).

Base OptionBolt CircleScrews Included
D 0.75" #4-40, length .250" pan head phillips (qty: 2)
M 0.75" M2.5x.45mm, length 6mm pan head phillips (qty: 2)
T n/a none - .005" thick transfer adhesive with peel away backing mount.

The included centering tool and spacer tool are used to center the base to the motor shaft and to set the codewheel gap.

SpecificationsMin.Typ.Max.UnitsNotes
Supply Current - 21 27 mA
Supply Voltage 4.5 - 5.5 V
High Level Output 2.4 - - V loh = -1 mA
Low Level Output - - 0.4 V lol = 6 mA
Rise Time - 500 - ns Cl = 25 pF, Rl = 2.7 kΩ
Fall Time - 100 - ns
SpecificationsMin.Typ.Max.UnitsNotes
Supply Current - 22 30 mA
Supply Voltage 4.5 - 5.5 V
High Level Output 2.4 3.4 - V loh = -20 mA
Low Level Output - 0.2 0.4 V lol = 20 mA
Rise Time - 500 - ns
Fall Time - 100 - ns

 e_series_output_2.gif

ParameterTyp.Units
Symmetry, S 180 ± 16 electrical degrees
Quadrature Delay, Q 90 ± 12 electrical degrees

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

 

4-pin Single-ended6-pin Differential
PinDescriptionPinDescription
1 +5VDC power 1 Ground
2 A channel 2 A channel
3 Ground 3 A- channel
4 B channel 4 +5VDC power
    5 B channel
    6 B- channel

1. PCB Installation

Position the PCB so that connector lines up with flat side of base. Push PCB onto base by hand so that the two guide posts fit into associated PCB holes.

2. Base Installation

2a. Standard: Secure base to mounting
surface with provided mounting screws.

2b. Transfer Adhesive: Slip centering tool over shaft and into center hole of base. Slide both parts down shaft until they contact mounting surface. Press base firmly to assure good adhesion. Remove centering tool.
3. Codewheel Installation

 

Set codewheel on shaft with disk facing base. Place spacer tool over codewheel with recess areas over connector and base tabs. Push tool down by hand until it bottoms out against base. Remove reusable spacer tool. In order to prevent permanent damage to motor bearings (especially on small diameter shaft motors), it is recommended that the far end (drive end) of the motor shaft be supported while installing the push on hub.

4. Cover Installation

Snap cover onto base.

Product Description

Restriction of Hazardous Substances

The E8P optical incremental kit encoder is designed for high volume, low cost, mid-resolution OEM motion control applications. The E8P is small enough for a NEMA Size 11 stepper motor.The E8P uses a single 5V supply and offers two TTL quadrature outputs. Single-ended or differential output options are available. A single chip reflective encoder module incorporates an LED, monolithic detector and molded lenses. The phased array technology accepts far wider mechanical tolerance and misalignment than traditional aperture type encoders. The E8P uses an innovative, patent pending, push-on codewheel that provides extremely secure and accurate, yet easy installation without setscrews.

The E8P provides mounting holes for two #4-40, length .250" screws or two M2.5x.45mm, length 6mm screws on a 0.75" diameter bolt circle. When mounting holes are not available, an  option with a transfer adhesive pre-applied to the base is available. A centering tool is provided to center the base to the motor shaft during installation. The codewheel pushes on by hand using a spacer tool to set the gap in one step. The cover snaps on to complete the assembly in seconds.

The single-ended output version has a 4-pin high retention polarized connector and is designed to drive cables up to six feet long. For longer cable lengths, the differential output version (6-pin connector) is recommended to maximize noise immunity. The internal 26C31 differential line driver can source and sink 20 mA at TTL levels. The recommended receiver is industry standard 26C32. Maximum noise immunity is achieved when the differential receiver is terminated with a 110 Ω resistor in series with a .0047 μF capacitor placed across each differential pair. The capacitor simply conserves power. Otherwise power consumption would increase by approximately 20 mA per pair, or 40 mA for 2 pairs.

Related
Product Notes
  • Cables and connectors are not included and must be ordered separately.
  • 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. Output


4. Cover


5. Base



6. Packaging



Product Part Number

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

Quantity Base Price
1 $37.35
10 $27.12
50 $22.01
100 $18.64
Over 100 Call for quote
Quantity
Unit Price

$37.35

Subtotal

$37.35

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

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