E3 Features
- Kit Version for mounting on a motor or other shaft
- Support 22 shaft sizes (2 to 25 mm and 1/8 in. to 1 in.)
- For NEMA 23 to NEMA 34 and larger motors
- 20 Resolutions from 64 to 10,000 CPR (256-40,000 PPR)
- 2 channel quadrature output with an optional index channel
- Choice of 2 base styles and 2 cover options
- High retention connector/cable (sold separately)
US Digital Motor Encoder E3 Description
The US Digital E3 motor encoder mounts directly to a motor or other rotating shaft. This optical encoder features a rugged, glass-filled polymer housing and is designed for easy installation and removal.
The E3 optical rotary encoder contains a precision machined aluminum hub with a specially patterned Mylar disk. This disk, in combination with our proprietary optical encoder module, creates a system that is highly tolerant to mechanical misalignment.
The E3 is available with two base configurations and two cover styles, which allow it to fit a wide range of applications. The output for this optical rotary encoder is single-ended. If your application requires a differential output (due to needing a cable over 10 feet or is located in an electrically noisy environment) you can either add a PC4 / PC5 differential line driver or check out our E5, which includes an optional differential output.
This incremental encoder is designed for use with a high-retention or standard connector/cable, which are sold separately.
Mechanical Drawings
Specifications
ENVIRONMENTAL
| PARAMETER | VALUE | UNITS |
|---|---|---|
| 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 |
MECHANICAL
| PARAMETER | VALUE | UNITS |
|---|---|---|
| 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 |
| Technical Bulletin TB1001 - Shaft and Bore Tolerances | Download | |
(1) 60000 RPM is the maximum rpm due to mechanical considerations. The maximum RPM due to the module's maximum frequency response is dependent upon the module’s resolution (CPR).
(2) Only for shaft diameters < 0.472".
(3) Add 0.125" to all required shaft lengths when using M-option.
TORQUE SPECIFICATIONS
| PARAMETER | VALUE | TORQUE |
|---|---|---|
| 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 |
PHASE RELATIONSHIP
A leads B for clockwise shaft rotation, and B leads A for counterclockwise rotation viewed from the cover side of the encoder.
ELECTRICAL
- Specifications apply over the 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.
| PARAMETER | MIN. | TYP. | MAX. | UNITS | CONDITIONS |
|---|---|---|---|---|---|
| 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 |
ACCESSORIES
1. Centering Tool
Part #: CTOOL - (Shaft Diameter)
This reusable tool centers the shaft within the encoder base during assembly. It is required for the proper functioning of the encoder.
2. Hex Tool
Part #: HEXD-050
Hex driver, 0.050" flat-to-flat for #3-48 or #4-48 set screws. Included with -B or -1 packaging options for order quantities of 10 or more.
Part #: HEXW-050
Hex wrench, 0.050" flat-to-flat for #3-48 or #4-48 set screws. Included with -B or -1 packaging options for order quantities of 9 or less. Included with -3 packaging option for all order quantities.
3. Spacer Tool
This reusable tool sets the proper spacing between the disk and sensor during assembly. It is required for the proper functioning of the encoder.
Part #: SPACER-E3S
Description: For shafts ≤ 0.394"
Part #: SPACER-E3L
Description: For shafts 12mm - 1"
4. Screws
Part #: SCREW-080-250-PH
Description: Pan Head, Philips #0-80 UNF x 1/4"
Use: Base Mounting
Quantity Required: 3
Screws are not included
Part #: SCREW-256-250-PH
Description: Pan Head, Philips #2-56 UNC x 1/4"
Use: Base Mounting
Quantity Required: 2
Screws are not included
Part #: SCREW-348-125-SS
Description: Socket Head Set Screw, 3-48 UNC x 1/8"
Use: Hub/Disk Mounting for 12mm - 1" Bore
Quantity Required: 2
Screws are included
Part #: SCREW-440-250-PH
Description: Pan Head, Philips #4-40 UNC x 1/4"
Use: Base Mounting
Quantity Required: 2
Screws are not included
Part #: SCREW-440-500-PH
Description: Pan Head, Phillips #4-40 UNC x 1/2"
Use: Module Mounting
Quantity Required: 2
Screws are included
Part #: SCREW-440-625-FH
Description: Flat Head, Phillips 4-40 UNC x 5/8"
Use: Cover Mounting
Quantity Required: 2
Screws are included
Part #: SCREW-448-063-SS
Description: Socket Head Set Screw, 4-48 UNC x 1/16"
Use: Hub/Disk Mounting for 5/16" - 10mm Bore
Quantity Required: 1
Screw is included
Part #: SCREW-448-125-SS
Description: Socket Head Set Screw, 4-48 UNC x 1/8"
Use: Hub/Disk Mounting for 2mm - 1/4" Bore
Quantity Required: 1
Screw is included
OUTPUT WAVEFORMS
Notes
- US Digital® warrants its products against defects in materials and workmanship for two years. See complete warranty for details.
- Cables and connectors are not included and must be ordered separately.
Configuration Options |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| E3 | - | CPR (Cycles Per Revolution) 64 100 200 400 500 512 1000 1024 1800 2000 2048 2500 3600 4000 4096 5000 7200 8000 8192 10000 | - | Bore Size 079 (2.0mm) 118 (3.0mm) 125 (1/8") 156 (5/32") 157 (4.0mm) 188 (3/16") 197 (5.0mm) 236 (6.0mm) 250 (1/4") 313 (5/16") 315 (8.0mm) 375 (3/8") 394 (10.0mm) 472 (12.0mm) 500 (1/2") 551 (14.0mm) 625 (5/8" Bore) 750 (3/4" Bore) 787 (20.0mm) 875 (7/8") 984 (25.0mm) 1000 (1") | - | Index IE (Index) NE (Non-Index) | - | Cover D (Default) E (Extended) H (Through-Hole) | - | Base D (Default) M (3" Diameter Bolt Circle) | - | Packaging Bulk (B) - Includes one centering, hex and spacer tool per order, plus an extra set per 100 encoders. Individual (1) - Includes one centering, hex, and spacer tool per order, plus an extra set per 100 encoders. Individual (3) - Includes one centering, hex, and spacer tool with each encoder. | ||||||||||||||||||||||||||||||||||||||||||||||||||||
|
PLEASE NOTE: This chart is for informational use only. Certain product configuration combinations are not available. Visit the E3 product page for pricing and additional information. |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||