COATS 16 Bit PCB User Manual

8113936 00 10/04 page 1 of 4

16 Bit PCB & Metal Arm Temporary

Instructions - 1800/1850 Balancer

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

[phone] • [phone] • [phone] FAX • www.ammcoats.com

Instructions

1. The Plastic Diameter Arm on the end of the dis­tance rod has been replaced with a more robust Metal
Diameter Arm. The plastic roller step is placed under
the bead seat area of the rim for all normal measure­ments (clip-on weights and Rim Runout) and the large
diameter is placed at the point of application for tape-a­weights.

2. On startup, the software recognizes whether the
machine is 1800 or 1850 and the appropriate menus
appear.

3. Important: It is necessary to perform a NOVRAM
reset on startup.

4. Power up machine and check for function of all
operations. Make any necessary adjustments:

• Ensure that Distance and Diameter Pots are set
between 2500 & 3500 on Machine Self-Test (Green
Screen).

• If Arm Calibrations are required:

Press the key and select the SERVICE
ADJUSTMENTS option . At the PASSWORD

prompt enter 1-3-5-7.
Toggle the DISTANCE/DIAMETER ARM TYPE

option to METAL.
In the following order, select the DISTANCE ARM

CALIBRATION option , WIDTH SONAR CALI­BRATION option , and DIAMETER ARM CALI­BRATION option

,

following the on-screen
instructions for each calibration. Note: At the end of
the Diameter Arm Calibration, hold the NEXT but­ton down until 281 degrees flashes on-screen; then
return the arm to its home position.

Important: Once the Arm is calibrated, there is lit­tle need to calibrate it again.

5. If the machine is an 1850 model or upgrade, a

Printer selection will appear in the GENERAL SETUP
menu (press the key, then select option ). At
the PRINTER menu select option to verify that the

printer option is toggled ON. For all other options the
default is ON.

An LED on the face of the printer will blink every sec-

ond to verify that the printer is powered.

6. To Calibrate with the 4-ounce weight, press the
key, then select SPECIAL FUNCTIONS option

and choose MACHINE SELF-CALIBRATION selec-

tion

.

Follow the instructions on-screen.

Important: The dimensions entered must match the

“calibration wheel”. A dimension cannot be zero.

7. If not already done, you may want to enter the

Owner Name and Address for the screen saver. The
OWNER ADDRESS selection is found under the SPE­CIAL FUNCTIONS menu.

8. The Board is factory set with the following menu

settings:

General Set-up

Printer = ON
Runout Unloaded " = SONAR (lateral)
Runout Unloaded # = SONAR (radial)

B

alancing Set-up

Runout Diagnostic = ON

Runout Limits

Max. True Limit = .050"
Rim Runout Limit = .010"
Correction Runout Limit = .030"

Special Functions

Static Unbalance Displayed = ON
Stop On Top = OFF

9. Refer to figure 1 showing the proper placement of

the metal arm roller on the rim.

Figure 1 - Placing The Metal Arm Roller On The Rim

10. See the new error code listing on the following

pages.

6

7

MENU

5

5

MENU

3

2

1

5

4

MENU

Error

No
Video

Err. 1

Err. 2

Err. 3

Err. 4

Err. 5

Err. 6

Err. 7 /
Err. 8

Err. 9

Symptom

The balancer does not turn on.

Rotation signal missing.
Wheel spins too fast & no brake.
Balancer does not start.
Motor turns but no rotation.

Too low speed when taking the
measurement.
During rotation to measure the
unbalance value, the wheel
speed has gone below 42 r.p.m.

Calculation Error.
Incorrect Machine Self­Calibration.

Counterclockwise rotation.
After pushing START the wheel
turns in the opposite direction.

Wheel guard hood open or the
START button has been pushed
without closing the wheel guard
hood.

Ram Error or defect.

Reading error of NOVRAM para­meters.

Access error in NOVRAM para­meters writing.

Check

1. Check for proper connection to the power supply.

2. Check and replace fuses on the power PCB if necessary.

3. Check the monitor function - press monitor menu button. (see trouble
shooting tips)

4. Check control transformer output.

5. Check FS1 & FS2 fuses on power PCB.

6. Check power cable to main PCB & output at power PCB.

7. Replace power PCB.

8. Replace the main PCB.

1. Check the belt tightness.

2. Encoder disconnected, bad or damaged wiring, failed optical unit - no
reset signal.

3. Check hood switch operation.

4. Replace the encoder unit.

5. Motor disconnected or bad wiring - check for motor voltage at power
PCB - check circuit breaker - check machine power.

6. If motor hums - remove belt and check for motor rotation at pulley - if
rotation, replace capacitor.

7. Check for faulty power PCB or main PCB.

1. Very light / small wheel mounted on balancer - not enough inertia to

keep wheel rotating.

2. Check belt tightening.

3. Check the operation and adjustment of the encoder and in particular, the
reset signal. (in MACHINE SELF-TEST “green screen”, Pos counts from
0 to 255 and then 0 again). UP = cw, DOWN = ccw.

4. Replace the main PCB.

1. Check the wheel dimensions setting.

2. Check the piezo pick-ups connections - electrical & mechanical. (in
MACHINE SELF-TEST “green screen”, push on spindle shaft and verify
that both piezo outputs change.

3. Execute the 4-ounce weight (Machine Self-Calibration).

4. Mount a wheel having a known unbalance (lower than 4.00 ounces or
100 grams) and check the balancer reading.

5. Replace the PC board.

1. In MACHINE SELF-TEST “green screen” - check the operation of

UP/DOWN - RESET signals of the encoder.

2. Check the connection of the motor for correct rotation.

1. Reset the error by pushing button 7 = EXIT

2. Close the wheel guard hood and press START button.

3. Check operation of the wheel guard micro-switch.

4. Press the START button.

1. Reset NOVRAM & check operation or Replace PCB.

1. Repeat the entire balancer calibration.

2. Switch the balancer OFF.

3. Wait a minimum time of 1 minute (approx).

4. Switch the balancer ON and check the proper operation.

5. Replace the PCB board.

1. Replace the PCB board.

8113936 00 10/04 page 2 of 4