US Digital E4T User manual

Description
The E4T miniature transmissive optical encoder is designed to provide digital
quadrature encoder feedback for high volume, limited space applications. The
E4T is designed to be a drop in replacement for the E4P that offers higher
maximum speed and increased output drive. The E4T utilizes an innovative,
push-on encoder disk which accepts shaft diameters of 2.0mm to .250".
The E4T miniature encoder base provides mounting holes for two #3-48, length
3/16" or two M2.5, length 4mm screws on a .586" bolt circle. The encoder cover
is easily snapped onto the base and is marked with the connector pin-out.
The E4T series encoder is connected using a 4-conductor, high retention,
polarized, 1.25mm pitch connector. Mating cables and connectors (see the
Cables / Connectors web page) are not included, and are available separately.
Features
Push-on hub - spring loaded collet design
Minimum shaft length of .275"
Fits shaft diameters of .079" to .250"
100 to 1000 cycles per revolution (CPR)
400 to 4000 pulses per revolution (PPR)
Single +5V supply
E4T Miniature Optical Kit Encoder
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E4T Miniature Optical Kit Encoder
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.315
8
THRU BASE
2X
.110
2.79
60°
.586
14.88
BC
.768
19.51
0 .446 [11.33] .346 [8.79] .309 [7.85] .089 [2.27] (M2.5) .120 [3.04] (#3-48)
PIN 1
DEFAULT #3-48 X 3/16" SCREWS
QTY 2 SUPPLIED
( M-OPTION BASE SUBSTITUTE M2.5 X 4)
.575
14.61
.505
12.82
.866
22
.295
H-OPTION COVER
(COVER HOLE FOR EXTENDED SHAFTS)
E4T Differential OEM Miniature Optical Kit Encoder
UNITS: INCHES [MM]
METRIC SHOWN FOR REFERENCE ONLY
RELEASE DATE: 11/18/2014
.315
8
THRU BASE
2X
.110
2.79
60°
.586
14.88
BC
.768
19.51
0 .446 [11.33] .346 [8.79] .309 [7.85] .089 [2.27] (M2.5) .120 [3.04] (#3-48)
PIN 1
DEFAULT #3-48 X 3/16" SCREWS
QTY 2 SUPPLIED
( M-OPTION BASE SUBSTITUTE M2.5 X 4)
.575
14.61
.505
12.83
.866
22
.295
H-OPTION COVER
(COVER HOLE FOR EXTENDED SHAFTS)
E4T Single-Ended OEM Miniature Optical Kit Encoder
RELEASE DATE: 11/18/2014
UNITS: INCHES [MM]
METRIC SHOWN FOR REFERENCE ONLY
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Environmental
Parameter Value Units
Operating Temperature -20 to 100 C
Electrostatic Discharge, IEC 61000-4-2
Single-ended (-S version)
Differential (-D version) ± 12
± 7 kV
Shock, 6 millisecond, half-sine 75 G
Vibration (20Hz to 2kHz, sinusoidal) 20 G
Mechanical
Parameter Value Units
Max. Shaft Axial Play ± .010 in.
Max. Shaft Runout (TIR) .002 in.
Max. Acceleration 250,000 rad/sec²
Maximum RPM (1)
e.x. CPR = 300, max. rpm = 20000
e.x. CPR = 200, max. rpm = 30000
minimum value of
(6000000/CPR)
and (60000)
RPM
Max. Codewheel Moment of Inertia 5.1 x 10^-7 oz-in-s²
Mounting Screw Size
Default (D-option base)
Metric (M-option base) #3-48 x 3/16"
M2.5, length 4mm
Screw Bolt Circle Diameter .586 ±.005 in.
Minimum Shaft Length (2) .275 in.
Maximum Shaft Length (2) .395 (D option) /
no limit (H option) in.
Mounting Screw Torque 2-3 in-lbs
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 100kHz maximum
output frequency is (6000000/CPR).
(2) Including axial play.
Single-ended Electrical
Specifications Min. Typ. Max. Units Notes
E4T Miniature Optical Kit Encoder
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Supply Voltage 4.5 5.0 5.5 V
Supply Current 25 30 mA CPR 500, no load
34 42 mA CPR > 500, no load
Low-level Output 0.4 V IOL = 8 mA
0.035 V no load
High-level Output 2.4 V IOH = -8 mA
4.0 V no load
Output Rise Time 100 ns no load
Output Fall Time 50 ns no load
Differential Electrical
Specifications Min. Typ. Max. Units Notes
Supply Voltage 4.5 5.0 5.5 V
Supply Current 27 32 mA CPR 500, no load
36 44 mA CPR > 500, no load
Single-Ended Output Voltage High 4.75 5.0 V Min. @ 25mA load, Typ. @ no load
Single-Ended Output Voltage Low 0.25 0.60 V Typ. @ no load, Max. @ 4.5mA load
Differential Output Voltage 3.0 3.8 V RL = 100 ohm
Differential Output Rise/Fall Time 20 ns
Phase Relationship
Parameter Min. Typ. Max. Units
Symmetry, S 105 180 255 electrical degrees
Quadrature Delay, Q 30 90 150 electrical degrees
(1) A leads B for clockwise shaft rotation, B leads A for counter clockwise shaft rotation viewed from the cover side of the encoder.
(2) Typical values represent the encoder performance at typical mounting alignment, whereas the maximum values represent the
E4T Miniature Optical Kit Encoder
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encoder performance across the range of recommended mounting tolerance.
Pin-out
4-pin Single-ended (1) 6-pin Differential (2)
Pin Description Pin Description
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) 4-pin single-ended mating connector is CON-MIC4
(2) 6-pin differential mating connector is CON-MIC6
Options
H-option (Hole In Cover)
The H-option adds a 0.295" diameter hole in the cover for the shaft to pass through.
M-option (Metric Mounting Screws)
Provides alternate metric M2.5, length 4mm screws. When M-option is NOT specified the default is #3-48 x 3/16" screws.
Accessories
1. Centering Tool*
Part #: MCTOOL - (Shaft Diameter)
Description: This reusable tool is used to accurately center the E4T base on the shaft.
2. Spacer Tool*
Part #: SPACER-E4T
Description:This reusable tool is used to properly space the codewheel from the encoder.
*Both the MCTOOL and SPACER-E4T tools are included with all packaging options.
E4T Miniature Optical Kit Encoder
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Ordering Information
E4T - - - - - -
CPR
100
108
120 =
125 =
128 =
200 =
250 =
256 =
300 =
360 =
400 =
500 =
512 =
1000 =
Bore
079 =
2mm
098 =
2.5mm
118 =
3mm
125 =1/8"
157 =
4mm
188 =
3/16"
197 =
5mm
236 =
6mm
250 =1/4"
Output
S =Single
Ended
D =Differential
Cover
D =Default
H =Hole in
Cover
Base
D =Default
M =Alternate metric
M2.5, length 4mm
screws
Packaging
B =Encoder components packaged
in bulk. One spacer and one
centering tool per 100 encoders.
1 =Each encoder packaged
individually. One spacer tool and
one centering tool per 100 encoders.
2 =Each encoder packaged
individually. One spacer and one
centering tool per encoder.
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 completewarranty for details.
E4T Miniature Optical Kit Encoder
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E4T Assembly Instructions
USD-4203
v8.0
Page 1
Step 1:
Place the base over the shaft and onto the mounting surface.
Slide the centering tool onto the shaft so that it contacts and
aligns the base. While applying light pressure to the centering
tool, secure the base to the mounting surface using two screws.
Step 2:
Remove the centering tool. Place the PCB onto the base
surface, aligning the board with the two mounting posts.Note
that the base is symmetrical allowing the connector to exit out
either side.
Caution: To prevent damage, avoid directly touching the
optical sensor area when handling the PCB.
Step 3:
Using the spacer tool, very firmly press down on the PCB in
order to push it over the alignment pins and completely onto
the base surface. Check to make sure that the PCB is fully
seated against the base. If it is not, use the spacer tool to press
it again, recheck that it is fully seated.
Step 4:
Place the hubdisk onto the shaft with the longer end of hub
toward the base. Position the spacer tool onto the hub such
that the notches are aligned with the latches of the base. Press
down firmly until the tool bottoms out on the PCB. Verify that
this action has pressed the PCB flush against the base.
Caution: While installing the hubdisk ensure that the hub bore
is parallel to the shaft. Forcing the hub onto the shaft at an
angle may cause permanent damage to the hub.
Mounting Screws:
2-3 in-lbs torque
Step 5:
Remove the spacer tool and snap the cover down onto the base,
(1). With your thumb and finger, squeeze the base latches
together to ensure they are fully engaged with the cover, (2).
7 E4T_1630-21448-0031-E-0219

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