HS35A 2
INSTALLATION
Refer to the back page of these instructions for outline and mounting
dimensions. Also available: EU (European Union) Installation Sheet and
Basket Mount Installation Sheet.
1) Disconnect power from equipment and encoder cable.
2) Use caliper gauge to verify motor shaft is proper diameter and
within allowable tolerances: +0.000", -0.0005" [+0.00,
-0.013mm].
3) Clean machine shaft of any dirt and remove any burrs.
4) Use dial indicator gauge to verify the motor shaft Total
Indicated Runout (TIR) < 0.002" [0.05mm].
5) Install the anti-rotation bracket to the face of the encoder using
8-32 screws and lock washers.
6) Loosen clamping collar and insert shaft sizing insert into
encoder. DO NOT FORCE.The insert has a retaining flange
and is larger at one end than the other.
7) Test Fitting: carefully slide the encoder onto the shaft to verify
fit. Ensure a minimum of 1/8" between encoder and mounting
surface. DO NOT FORCE. Encoder should slide on easily. If
the encoder does not fit easily, remove it, verify shaft size and
check for burrs and shaft damage.
8) Apply thread locker to screw on clamping collar. Note: models
shipped
since 2015 have thread locker preapplied to clamping
screws. Tighten each screw to 18-20 in-lb [2.0-2.3 Nm]. DO NOT
USE A STANDARD RIGHT ANGLE WRENCH.Use only a T-handle hex
wrench or torque wrench with hex bit.
9) Secure free end of anti-rotation bracket to frame. Use in sul at ing
hardware as shown (supplied with Avtron anti-rotation kit). Use
additional washers as needed to install the bracket without a
large deflection or bend. For 8.5” C-Face, install 1/2”-13 to 3/8”-
16 reducer with 3/8”-16 threaded stud (supplied) to secure anti-
rotation bracket using insulating hardware as shown.
10) Turn shaft by hand and verify the shaft turns freely and does
not produce excessive runout/wobble of the encoder:
<0.005" [0.13mm] TIR (Total Indicator Reading). Additional
instructions under “Adjusting the Encoder to Eliminate Excess
Runout/Wobble” are provided if needed.
11) Connect cable as shown in wiring diagram.
12) Apply power (5-28VDC) to the encoder.
13) Rotate the shaft by hand, or using jog mode of the speed
controller and verify proper direction.
14) Optional: Install Protective Basket using either T-bolts (Fan
Cover) or bolt to 4.5" C-Face (bolts provided). For 8.5" C-Face
use adapter clips supplied. Be certain that the Protective
Basket does not touch or interfere with the anti-rotation arm.
To mount the basket on an 8.5” C-face, thread the 1/2”-13
bolts into the motor face, through each clip (provided with
options “F” and “U”) but do not tighten fully. Pivot the basket
over the encoder, and pivot each clip over each respective
basket bolt hole. DO NOT FORCE. Tighten each bolt to
secure the basket and clip.
Adjusting the Encoder to Eliminate Excess Runout/Wobble:
In a typical installation, a housing movement of 0.005" TIR or less (as
measured at the outside diameter of the main encoder body) will not
have an adverse effect. If excessive housing movement is detected in
the installation:
1) Check the shaft the HS35A is mounted on for excessive
shaft runout using a dial gauge. NEMA MG1 calls for 0.002"
TIR or less.
2) Verify that the mounting shaft meets minimum and maximum
diameter tolerances.
3) Maximize the shaft insertion into the encoder (retaining the
minimum of 1/8" between mounting face and encoder)
4) Loosen the clamping collar and rotate the motor shaft 180°
within the encoder hollow shaft sleeve. Retighten the
clamping collar.
5) Loosen the clamping collar; move the split in the clamping
collar over a solid portion of the encoder shaft, retighten the
clamping collar.
If excessive housing movement still exists after the above steps, the
shaft or the encoder may be damaged and should be checked by the
manufacturer.
Shaft Sizes:
HS35M: 1/2”*, 5/8”*, 3/4”*, 7/8”*, 1”*, 1 1/8”, 12mm*, 15mm*,
16mm*, 20mm*, 25mm, 30mm
NOTE:
HS35A units <1” bore utilize shaft insulating resin insert;
models may be resized as needed by interchanging or
removing inserts. Consult factory for other shaft
sizes not shown
.
Shaft Engagement:
HS35A: Shaft insertion/engagement should be 1.25" to 2.25" [32mm
to 57mm] with a minimum of 0.125" [3mm] between encoder and
mounting surface. Minimum insertion/engagement is 1.75" [44mm]
for models using a sizing insert. If greater shaft insertion is required,
remove outboard shaft cover and mount the encoder as a through-
shaft unit.
For shaft lengths greater than the maximum engagement allowed, end
of shaft mounting may still be employed by using a spacer between
the mounting surface and anti-rotation bracket.
CAUTION
When inserting shafts to a depth over 2.25" [57mm], be
sure to remove the shaft cover to prevent cover contact
with the rotating shaft.
WIRING INSTRUCTIONS
CAUTION
Be sure to remove power before wiring the HS35A
Encoder. Be sure to ground the cable shield(s): It can be
connected to case ground at the encoder, or grounded at
the receiving device, but should not be grounded on both
ends. If necessary, case ground can also be provided
through a separate wire. Be certain not to ground the
case ground wire if the encoder is already grounded by
mechanical mounting. (The standard antirotation arm
kits provide insulating washers)
