HEDS-8901 Avago Technologies US Inc., HEDS-8901 Datasheet - Page 3

• 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

Block Diagram
Defi nitions
Count (N): The number of bar and window pairs or counts
per revolution (CPR) of the codewheel.
1 Shaft Rotation
Pulse Width (P): The number of electrical degrees that
an output is high during 1 cycle. This value is nominally
180°e or 1/2 cycle.
Pulse Width Error (ΔP): The deviation, in electrical degrees
of the pulse width from its ideal value of 180°e.
State Width (S): The number of electrical degrees between a
transition in the output of chan nel A and the neighboring
transition in the output of channel B. There are 4 states per
cycle, each nominally 90°e.
3
1 cycle (C)
= 360 mechanical degrees,
= N cycles.
= 360 electrical degrees (°e),
= 1 bar and window pair.
Output Waveforms
State Width Error (∆S): The deviation, in electrical degrees,
of each state width from its ideal value of 90°e.
Phase (φ): The number of elec trical degrees between the
center of the high state of chan nel A and the center of
the high state of channel B. This value is nominally 90°e
for quadrature output.
Phase Error (∆φ): The deviation of the phase from its ideal
value of 90°e.
Direction of Rotation: When the codewheel rotates in the
direc tion of the arrow on top of the module, channel A will
lead channel B. If the codewheel rotates in the opposite
direction, channel B will lead channel A.
Optical Radius (R
center of rotation to the optical center (O.C.) of the en-
coder module.
S1
op
): The dis tance from the codewheel’s
P
ф
S2
ROTATION
C
S3
S4
CHANNEL B
CHANNEL A