Cebora SOUND MIG 2035/M Pulse Service Manual page 20

CEBORA S.p.A.
MOTOR SPEED REFERENCE SIGNAL TEST WITH TRADITIONAL TORCH.
Control board (27), connector J12 terminal 24 (+) (or C79 left side) and connector J14 (-) =
0 / +5 Vdc adjustable with knob (B).
♦ Check the wiring between connectors J12 on control board (27) and J1 on panel
board (41), and make sure the push-pull board (43) is properly mounted on panel
board (41).
♦ Replace the control (27) and/or panel (41) and/or push-pull (43) boards.
♦ With the power source off, temporarily disconnect the terminals of the wire feeder motor
(401) from the connector J13 control board (27), and make sure that the resistance between
the terminals of the motor left free = approximately 1 ohm (motor winding resistance). If 0
ohm (short-circuit), replace the wire feeder motor (401) and control board (27).
♦ Make sure the machine is set for the traditional torch by carrying out the TORCH TYPE
RECOGNITION TEST, par. 3.3.4.
♦ Make sure the wire feeder motor command is present by carrying out the START
COMMAND TEST WITH TRADITIONAL TORCH, par. 3.3.4.
♦ See CONTROL BOARD (27) POWER SUPPLY TEST, par. 3.3.1.
♦ Replace the control board (27).
WIRE FEEDER MOTORS TEST WITH PUSH-PULL TORCH.
Control board (27), connector J13, terminals 1(+) and 2(-) = approximately +1,5 / +25 Vdc,
according to the program set, with start button pressed and adjustable with knob (B).
Push-pull board (43), connector J1, terminals 1(+) and 8(-) (or wire feeder motor on push-pull
torch terminals) = approximately +3 / +25 Vdc, according to the program set, with start button
pressed and adjustable with UP/DOWN buttons on the torch.
♦ Check the wiring between J13 control board (27) and wire feeder motor (401),
and between J1 push-pull board (43) and torch motor.
♦ With the power source off, temporarily disconnect the terminals of the wire feeder
motor (401) from the connector J13 control board (27), and make sure that the
resistance between the terminals of the motor left free = approximately 1 ohm
(motor winding resistance). If >Mohm (winding broken), replace wire feeder
motor (401).
♦ With the power source off, temporarily disconnect the torch from the power
source and check the resistance between terminals 1 and 8 of the patch connector
on the torch. Correct value = approximately 4 / 40 ohm (motor winding resistance,
depends on the rotor stopping point). If >Mohm (winding broken), check the
wiring between connector and torch motor, or replace the torch motor.
♦ Make sure that there are no mechanical impediments blocking the motors.
♦ Check the motor rotation direction; if wrong, reverse the wires on the terminals of
J13 on control board (27) and/or on the torch motor.
3.302.161
Correct?
YES
WITH PUSH-PULL TORCH
Correct?
NO
NO
YES
20
24/03/2004