The Wire Feeder Motor Does Not Work - Cebora SYNSTAR 200 T Manual De Servicio

3.3.7

The wire feeder motor does not work.

WARNING
On power sources art. 323 and 324 the Test Wire command
is absent.
The wire feeder motor is activated with the start command,
which also activates the inverter operation.
Therefore, during the threading operation be careful
do not put in contact the torch or welding wire with the
ground potential (welding bench or workpiece).
WIRE FEEDER MOTOR (25) TEST.
□ Panel board (48), connector J13, terminals 1(+) and
2(-) = +3 ÷ 14 Vdc approx., with start button pressed.
Maintaining the start button pressed the voltage from
initial +3 Vdc rise up to +14 Vdc in approximately 5 s.
(whatever the welding program selected).
NO Correct?
♦ Check the wiring between J13 panel board
(48) and wire feeder motor (25).
♦ With the power source off, temporarily dis-
connect the wire feeder motor (25) terminals
from connector J13 on panel board (48) and
make sure the resistance between the motor
terminals left free. Correct value = approxi-
mately 2 ÷ 4 ohm (motor winding resistance).
If >Mohm (winding interrupted), replace
wire feeder motor (25).
♦ Make sure there are no mechanical impedi-
ments blocking the motor (25).
♦ Check the motor rotation direction. If incorrect,
reverse the wires on connector J13.
♦ Replace the wire feeder motor (25) and/or
panel board (48).
MOTOR POWER SUPPLY TEST.
□ Panel board (48), connector J15, terminals 2(+) and 1(-),
voltage = :
− (art. 323) +40 Vdc approx., with power source pow-
ered, +55 Vdc approx. with start button pressed;
− (art. 324) +40 Vdc approx., with power source
powered.
YES Correct?
♦ Check wiring between J15 panel board (48)
and J9 (J11 on art. 324) on power board (45).
♦ (art. 323) With the power source off, tempo-
rarily disconnect J9 from power board (45).
Power up the power source and make sure
3302317/A
YES
NO
on J9 of power board (45) terminals 2(+) and
1(-), voltage = +40 Vdc approx. with power
source powered, +55 Vdc approx., with start
button pressed.
If not correct:
− check supply voltages of the power (45)
and panel (48) boards, performing the
tests of par. 3.3.1.
− check the inverter operation performing,
if necessary, the OPEN CIRCUIT OUT-
PUT VOLTAGE TEST, par. 3.3.8;
− verify efficiency of the diodes D19, D20,
D21, D22, inductor L4, capacitor C28 and
power transformer T4 on power board
(45) (see Fig. 2.3.1);
− replace power board (45).
If correct, identify defective components on
panel board (48), basing on the Connectors
map of par. 5.8.
♦ (art. 324) With the power source off, tempo-
rarily disconnect J11 from power board (45).
Power up the power source and make sure on
J11 of power board (45) terminals 2(+) and
1(-), voltage = +40 Vdc approx. with power
source powered.
If not correct:
− check supply voltages of the power board
(45) performing the SERVICES TRANS-
FORMER (62) POWER SUPPLY TEST
and POWER BOARD (45) POWER SUP-
PLY TEST, of par. 3.3.1.
− verify efficiency of the B3 rectifier bridge,
capacitors C25, C28, diode D20 on power
board (45) (see Connectors map, par. 5.7);
− replace power board (45).
If correct, identify defective components on
panel board (48), basing on the Connectors
map of par. 5.8.
♦ Replace power (45) and/or and/or panel (48)
boards.
SPEED FEED-BACK SIGNAL TEST.
□ Panel board (48), connector J4, terminals 2(+) - 4(-) =
terminals 3(+) - 4(-) = Fig. 5.4.1, three seconds after
pressing the start button (speed feed-back signal from
motor encoder).
NO Correct?
♦ Regular operation.
■ Check the wiring between J13 panel board (48) and
wire feeder motor (25).
■ Make sure there are no mechanical impediments
blocking the motor (25).
YES
27
EN