Avago HEDC-5 Series Installation and operating instructions

HEDC–5xxx Series
Kit Encoders with a Connector Latch
Application Note 5554
Introduction
The HEDC-5xxx-xxx encoder with a connector latch on
the cover housing requires a dierent assembly method
than the HEDS-55xxx series. However, the internal encoder
module is exactly the same.
This application note provides step-by-step mounting
instructions on how to install the new Avago HEDC-5xxx
series encoders onto a motor.
Encoder Mounting and Assembly Instruction
Step 1. Base plate centering
Place the base plate over the motor shaft as shown in
Figure 1. Place the centering tool over the motor’s shaft,
and ensure that it is aligned to the hole in the base plate.
Align and install the screws through the encoder base plate
and screw into the motor. Depending on the motor, this
process will involve either two or three screws. The process
is the same for the base plate with extended mounting
ears. It is recommended that adhesives be applied to the
screw-base plate interface.
Remove the centering tool.
Screw Size Torque Range (in-lbs)
#0-80 or M1.6 0.4 to 0.8
#2-56 or M2.5 0.9 to 2.0
#4-40 or M3 3.5 to 4.5
Centering tool
Base plate
Figure 1. Base plate assembly
Figure 2. Codewheel height setting
Step 2. Codewheel placement height setting
Place the height setting tool over on top of the base plate
as shown in Figure 2.
Height setting tool
Figure 3. Codewheel mounting
Step 3. Codewheel mounting
Mount the hub of the codewheel to the motor shaft.
DO NOT handle the codewheel. Touch only the hub during
installation. Ensure that the codewheel hub is well ”seated”
on top of the height setting tool, as shown in Figure 3.
Press down on the top of the hub while tightening the set
screw with the hex wrench (supplied). The hub set screw
attaches the codewheel to the motor shaft. The recom-
mended torque to tighten the set screw is 15-18 oz-in
(0.9-1.2 in-lbs).
Remove the hex wrench and spacer tool.

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AV02-3426EN - April 30, 2012
Figure 4 b. Secure the module to the base plate with two screws
Step 4. Encoder module assembly
With the encoder module part number side up, slip it into
position with the codewheel in the slot in the housing.
Moving from the side, as shown in Figure 4a, and being
careful not to contact the codewheel, seat the module on
the base plate guide posts. Its nal position should be as
shown in Figure 4b.
Avoid any collision with the fragile codewheel, which
could result in damage to the codewheel and adversely
aect the performance of the encoder.
As shown in Figure 4b, install two screws (supplied)
through the module and into the base plate. The recom-
mended screw torque is 3.5-4.0 in-lbs.
Figure 4 a. Position the encoder module with the codewheel passing
through the slot
Module with the
part number side
facing up
Module guide posts,
two places
Figure 5. Housing cover assembly
Step 5. Housing cover installation
Place the housing cover over the base plate and install
two screws (supplied) to secure. The recommended screw
torque is 2-4 in-lbs.
The completed encoder assembly is shown in Figure 6. It is
now ready for cable attachment and operation.
Figure 6. Completed HEDC-5xxxx assembly