COATS Kit 8142331 User Manual

Encoder Gapping Tool

Encoder/Sonar Adjustment

Note: Errors 55, 57, or 59 occur when the value read by the sonar is insufﬁcent to obtain a correct runout measurement.

1. Make sure the Radial Runout and Lateral Runout

Sonars are aligned correctly.

2. Set Encoder to pulley gap at 0.040".

To make adjustments to the encoder simply remove the weight tray. Use the Encoder Gapping Tool and see if it will ﬁt between the encoder PCB and the encoder wheel. If not remove the bolt holding the bracket, place a drop of loctite on the threads. Reposition the encoder assembly and snug down the bolt with the Encoder Gapping Tool between the PCB and wheel (0.040").

Note: 1) Do not use a material that could scratch the encoder decal. 2) To achive a correct adjustment, position the Tool behind the encoder PCB; to the right

the holding bracket and not between the bolt heads.

Check your readings again.

3. Go to Self-Test Screen (Green Screen) and verify that the Encoder is operating correctly and the Sonar is reading correctly. Use the Sonar check tool (p/n

8114161) or a tape measure and ﬂat card for a target.

XR 1800/1850 Models

Closest Target (Sonar) Readings: 4-inches = 2450 to 2470 Farthest Target (Sonar) Readings: 14-inches = 8100 to 8300

XR 1750 Model

Closest Target (Sonar) Readings: 4-inches = 3840 to 3880 Farthest Target (Sonar) Readings: 14-inches = 12800 to 13200

Note: If the correct readings cannot be obtained then

replace the sonar.

Notched area for

placement between

the encoder PCB and

the encoder wheel.

Encoder

Decal

Encoder

PCB

Gapping

Tool

Closest Target (Sonar) Reading

Farthest Target (Sonar) Reading

Encoder Gapping Tool

Kit #81142331

for XR Series Wheel Balancers

COATS, Inc. • Hennessy Industries • 1601 J.P. Hennessy Drive, LaVergne, TN 37086-3565

(800) 688-6359 • (615) 641-7533 • (615) 641-5104 FAX • www.ammcoats.com

4. For XR 1800/1850 software (version 1.06 and

higher) and XR 1750 software (all versions):

From the Green Screen press button 2 for 2 seconds

and then the Encoder Test Screen will appear.

5. With hood down Press START to run the Encoder Test. It will work with or without a wheel on the machine. At the end of the Test Run lines of text will appear below the graphs:

Line 1: > No. ck encoder: ENCA=64 ENCB=64

Both of these values should be 64, if not, an IN or OUT

encoder adjustment (from the 0.040" gap) is indicated.

Line 2:

XR 1800/1850 Models

> Timing signal: ENCA=2000-3500 ENCB=3500-5000

XR 1750 Model

> Timing signal: ENCA=1500-3000 ENCB=2500-4000

(These numbers will vary within the range and some even outside of the range. The important thing is to get rid of Line 3: Error reset.)

If the encoder is not set correctly, a third line of text

will appear:

Line 3: > Error reset ENCA or Error reset ENCB

(If one of the above messages appear: Slightly loosen the small nuts holding the encoder PCB to the bracket. For ENCA rotate the PCB slightly upward and for ENCB rotate the PCB slightly downward. Then re-tighten the small nuts and rerun the Encoder Test.

Rotate the PCB until the Error reset messages are eliminated.

6. Now, if any Error 55, 57, or 59 appears then the problem is most likely a very rough tread pattern or alignment of the sonar. Move the sonar to a different spot near the center of the tread.

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