Arc Machines 227 - Manual (Page 61)

MODEL 227
OPERATION MANUAL
Doc # 740063 Rev E
SECTION V - OPERATION
5.12 WELDING OPERATION
NOTE
Before running a weld schedule the weld head must be calibrated to the
M-227. When a weld head is switched from one power supply to another it must
be re-calibrated to the new power supply. If the weld head being used has not been
calibrated, perform the cal procedure in this section.
All of this step is based on the OPERATE MODE switch being in the OPERATE
or Program position.
1. Select the desired weld schedule from the library. Entry of schedules into the
library is a programming function and not discussed in this section.
2. Install the weld head per section III and the weld head manual, be sure to
connect the Work Ground Clamp also.
3. Install the correct tungsten and the material to be welded into the weld head as
described in the weld training manual and weld head manual.
4. Turn on the gas source (at the regulator/ flowmeter). Engage MANUAL
PURGE and set the required flow rate for the weld and weld head being used.
Continue Manual purge until all lines are filled with the gas and all moisture
and impurities have been removed. How long this takes depends on the
conditions. When this is done dis-engage the Manual Purge function.
5. When the weld schedule has been selected the upper display will indicate that
the system is in the TEST mode. Pressing the SEQ START key at this time
will run the complete weld schedule without an arc. First-time operation of the
system should be done this way to insure that rotation, wire and all sequence
functions are working properly.
6. When all items are prepared properly for welding (not covered in this manual)
and system operation has been verified, press the WELD/TEST key. The upper
display will now say READY TO WELD. INSURE THAT THE ARC CAN
BE STRUCK SAFELY.
7. Press the SEQ START key. The system will start to purge gas and the display
will appear a follows:
5.17