Miyachi Unitek ISA Series, Operator'S Manual

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CHAPTER 4: OPERATING INSTRUCTIONS
ISA-4001CR INVERTER POWER SUPPLY
4-2 990-364
Section II: Operation
Starting Welding Operation
1. Turn on cooling water supply at the temperature and flow rate shown in Chapter 2.
2. Turn on the input power. Observe that the red
WELD POWER
lamp lights, and green
READY
lamp blinks for 35 seconds, then goes off.
3. Set the program as follows:
4. On the Program Unit, press the
MENU
key to see the
MENU
screen.
5. Move the cursor to
SCHEDULE MODE
and press the
ENTER
key.
6. Set each item as described in Chapter 3.
7. Again press the
MENU
key to bring back the Menu screen.
8. Move the cursor to
SCHEDULE
and press the
ENTER
key.
9. Set each item as described in Chapter 3.
NOTE:
For initial set-up, current settings should be a little lower than predicted to prevent
damage from excessive settings.
Check the Valve Sequence
1. Press and hold the Power Supply
WELD ON/OFF
switch until the green LED goes out.
2. Initiate a start signal while the
READY
lamp is not on, and check each sequential operation.
WARNING:
When confirming the operation, check that the Squeeze time (SQZ) is sufficient.
If the welding current begins before the welding electrodes have reached sufficient force,
expulsion is produced.
3. If no error is detected in step b, assure that the three
READY
requirements are met:
4. The Power Supply
WELD ON/OFF
LED must be on,
5. The
ON/OFF
setting of the Program Unit must be set to ON, and
6. An external
WELD ON/OFF
signal must be present at the I/O terminal block.
7. Check that the Power Supply green
READY
lamp is lit
8. Start the weld sequence and confirm that the welding current is flowing normally by checking
the red
WELD
lamp and the Monitor screen.
9. Make any necessary adjustments to the schedule so that the work piece will be properly
welded.
10. When welding multiple work pieces according to multiple schedules, change the
SCHEDULE #
and set new time and welding current.
11. Set the upper and lower limits on Program Unit Monitor Set screen for
each SCHEDULE #
.
12. Begin welding following normal procedures. Adjust
SCHEDULE
settings as necessary.