Arc Machines 227 - Manual (Page 31)

MODEL 227
OPERATION MANUAL
Doc # 740063 Rev E
SECTION IV - SYSTEM FUNCTIONS
4.3 WELD SEQUENCE
3. EVENT 3:
6. WIRE FEED START DELAY - Feeding of the Wire should not occur,
in most cases, until travel has started. When the arc is established the
WIRE FEED START DELAY time will begin to count. When this time
is complete the wire will be able to feed if the Wire Mode is set to ON.
7. AVC START DELAY - The AVC should not be turned on until the
current is near full value and the puddle has stabilized. When the arc is
established the AVC START DELAY time will begin to count. When
this time is complete the AVC will be able to operate.
8. OSCILLATOR UPSLOPE - The Torch Oscillator Upslope is linked to
the current Upslope time. During the Current Upslope time the
Oscillator Amplitude (movement) will start at 0 amplitude and slowly
increase to the full program value of OSC Amplitude by the end of
current Upslope.
9. OSCILLATOR DWELL and EXCURSION TIMERS - The Oscillator
movement is based on time. The Level 1 Dwell and Excursion Timers
start counting at the beginning of Event #3 (if OSC MODE is set to ON).
4. EVENT 4: FULL LEVEL FUNCTIONS - Sometime after the arc is
established, depending on the weld schedule, the current UPSLOPE, OSC
UPSLOPE and all START DELAYS (Travel, Wire, AVC) will be completed
and all of the following functions will be in effect:
1. LEVEL 1 TIME - Will be counting towards 0. During its count all of
the below functions will be occurring:
2. LEVEL 1 PULSE MODE - The PULSE MODE can be set in each
LEVEL to work several different ways:
ON = In the ON mode system will pulse between PRIMARY and
BACKGROUND function values using the PULSE TIMERS for
timing control.
OFF = In the OFF mode all system functions will be in
PRIMARY only. No BACKGROUND functions will be done.
SYNC = In the SYNC Mode the system will pulse between
PRIMARY and BACKGROUND function values using the
Oscillator Dwell and Excursion Timers for pulse control.
4.5