Clinton 970, Service Manual

®

ML970-11

SECTION IV

TEST MODE

A. BUILT-IN TEST PROGRAM

A test program is available to test the major functions for a proper operation.  To access the program
press the     and        buttons simultaneously.
The display will read "SYSTEM TEST" briefly then press "SET", after which the following may be
tested: TREADLE, INDEX SIGNAL, ENCODER, MOTOR BALANCE

1. Treadle Test

Press the         button until "TEST TREADLE" will be displayed briefly then "NEUTRAL".
a. Move the pedal from neutral to heel 1 then to heel 2.  The display should show each position.
b. Move the pedal forward slowly.  As the pedal is moved, a number (0 to 255) will be dis

played.

Note: This number is proportional to how far the pedal is moved.  The lowest number should

be no more than "8" and the highest number greater than "250".

2. Index Signal

Press the        button.  The display will read "TEST INDEX" briefly then show a broken line
"-------".  Rotate the motor by hand until the display shows "----INDEX----" signal.  If this signal is
not displayed within one revolution of the handwheel, the encoder has failed.

3. Encoder Test

CAUTION:Separate the coupling.  The coupling must be separated because the motor may not

develop sufficient torque to turn the machine.

Press the       button.  The display will read "TEST ENCODER" briefly then "PUSH START
(enc)".
Press the       button, the motor will begin to rotate slowly and the display will read "PLEASE
WAIT".After 2 or 3 seconds the motor will stop and the display shows the number of counts.
The number should be between 240 and 260 pls.

4. Motor Balance Test

Press the        button.  The display will read "CHECK BALANCE" briefly then "PUSH
START(bal)".
Press the        button.  The motor will begin to rotate slowly in one direction and then the other,
the display will read "PLEASE WAIT".  When the motor stops the display will show a balance
number  (0-255).  The balance number should be below 10.

Note: If the motor is to far out of balance the display may read "DIRECTION FAILED".  This

error message will also occur if the motor is unplugged from the control box when the
balance is being tested.