HEDS-8901 Avago Technologies US Inc., HEDS-8901 Datasheet - Page 2

• Manufacturer Part Number: HEDS-8901
• Description: TOOL GAP SETTING FOR 2CH 28MM CW
• Manufacturer: Avago Technologies US Inc.

Specifications of HEDS-8901

• Accessory Type: Gap Setting Tool
• Product: Tools & Accessories
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: HEDS-91xx Series
• For Use With: HEDS-9101#G00 - ENCODER MODULE 2CH 360CPRHEDS-9101#E00 - ENCODER MODULE 2CH 200CPRHEDS-9101#C00 - ENCODER MODULE 2CH 100CPRHEDS-9101#A00 - ENCODER MODULE 2CH 500CPRHEDS-9100#S00 - ENCODER MODULE 2CH 50CPRHEDS-9100#K00 - ENCODER MODULE 2CH 96CPRHEDS-9100#J00 - ENCODER MODULE 2CH 1024CPRHEDS-9100#I00 - ENCODER MODULE 2CH 512CPRHEDS-9100#H00 - ENCODER MODULE 2CH 400CPRHEDS-9100#G00 - ENCODER MODULE 2CH 360CPRHEDS-9100#F00 - ENCODER MODULE 2CH 256CPRHEDS-9100#E00 - ENCODER MODULE 2CH 200CPRHEDS-9100#C00 - ENCODER MODULE 2CH 100CPR516-2030 - ENCODER MOD OPT INCREMENTAL 2CH516-2029 - ENCODER MOD OPT INCREMENTAL 2CH
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Theory of Operation
The HEDS-9000 and 9100 are C-shaped emitter/detec-
tor modules. Coupled with a codewheel, they translate
the rotary motion of a shaft into a two-channel digital
output.
As seen in the block diagram, each module contains a
single Light Emitting Diode (LED) as its light source. The
light is collimated into a parallel beam by means of a
single polycarbon ate lens located directly over the LED.
Opposite the emitter is the integrated detector circuit.
This IC consists of multiple sets of photodetectors and
the signal processing circuitry necessary to product the
digital waveforms.
Package Dimensions
HEDS-9x00
HEDS-9x01
2
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
2.16 (0.085)
DEEP
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
2.16 (0.085)
DEEP
(0.040 ± 0.004)
1.02 ± 0.10
(0.040 ± 0.004)
5.1 (0.20)
1.02 ± 0.10
OPTION CODE
5.1 (0.20)
0.63 (0.025)
OPTION CODE
SQR. TYP.
1.85 (0.073)
8.64 (0.340)
0.63 (0.025)
SQR. TYP.
1.85 (0.073)
8.64 (0.340)
REF.
REF.
26.67 (1.05)
HEDS-9X01
(0.680)
(0.825)
SIDE A
(0.60)
17.27
20.96
15.2
26.67 (1.05)
HEDS-9X00
C L
(0.680)
(0.825)
SIDE A
(0.60)
20.96
17.27
15.2
C L
DATE CODE
2.54 (0.100) TYP.
(0.096/0.095 X 0.110)
2.67 (0.105) DIA.
MOUNTING THRU
HOLE 2 PLACES
OPTICAL CENTER
DATE CODE
1.0 (0.04)
2.16 (0.085) DEEP
2.54 (0.100) TYP.
(0.147 ± 0.002)
2.44/2.41 X 2.79
2.67 (0.105) DIA.
MOUNTING THRU
HOLE 2 PLACES
OPTICAL CENTER
1.0 (0.04)
3.73 ± 0.05
(0.096/0.095 X 0.110)
(0.147 ± 0.002)
2.16 (0.085) DEEP
2.44/2.41 X 2.79
3.73 ± 0.05
16.76 ± 0.20
(0.66 ± 0.008)
(0.158 ± 0.008)
4.01 ± 0.20
(0.070 ± 0.004)
(0.115 ± 0.004)
2.92 ± 0.10
1.78 ± 0.10
(0.115 ± 0.004)
(0.82)
(0.070 ± 0.004)
20.8
1.52 (0.060)
1.78 ± 0.10
2.92 ± 0.10
(0.46)
11.7
(0.46)
11.7
MILLIMETERS AND (INCHES)
TYPICAL DIMENSIONS IN
MILLIMETERS AND (INCHES)
The codewheel rotates between the emitter and detec-
tor, causing the light beam to be interrupted by the pat-
tern of spaces and bars on the code wheel. The photo-
diodes which detect these interruptions are arranged in
a pattern that corresponds to the radius and design of
the ode wheel. These detectors are also spaced such that
a light period on one pair of detectors corre sponds to a
dark period on the adjacent pair of detectors. The photo-
diode outputs are then fed through the signal process-
ing circuitry resulting in A, A, B, and B. Two comparators
receive these signals and produce the fi nal outputs for
channels A and B. Due to this integrated phasing tech-
nique, the digital output of channel A is in quadrature
with that of channel B (90 degrees out of phase).
TYPICAL DIMENSIONS IN
(0.400)
10.16
(0.400)
10.16
8.6 (0.34)
(0.087)
(0.215 ± 0.004)
OPTICAL
CENTER LINE
8.6 (0.34)
2.21
OPTICAL
CENTER LINE
(0.087)
5.46 ± 0.10
2.21
(0.215 ± 0.004)
5.46 ± 0.10
(0.100)
2.54
(0.100)
2.54
ALIGNING RECESS
2.44/2.41 X 2.79
(0.096/0.095 X 0.110)
2.16 (0.085) DEEP
(0.187 ± 0.004)
ALIGNING RECESS
2.44/2.41 X 2.79
(0.096/0.095 X 0.110)
2.16 (0.085) DEEP
(0.187 ± 0.004)
4.75 ± 0.10
4.75 ± 0.10
(0.11)
(0.11)
2.9
2.9
(0.07)
(0.07)
1.8
1.8
OPTICAL
CENTER
OPTICAL
CENTER
6.9 (0.27)
SIDE B
SIDE B
6.35 (0.250) REF.
6.35 (0.250) REF.
45
45 °
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
2.16 (0.085) DEEP
ALIGNING RECESS
2.44/2.41 DIA.
(0.096/0.095)
2.16 (0.085) DEEP
4.11 (0.162)
4.11 (0.162)
(0.23)
(0.23)
5.8
5.8
(0.47)
11.9
(0.347)
(0.347)
8.81
8.81