Start / Stop; Processor - ESAB MEK 4 Service Manual

13

Start / Stop

The trigger switch in the welding gun is supplied at 42 V AC. Closing the switch
energises optocoupler IC10, pulling down the voltage across C46.
14

Processor

The processor stores the machine program. It monitors the power supply voltages:
if the voltages drop to too low a level, wire feed is stopped, as described in section 1
above.
The processor also monitors speed. If the wire speed deviates from the set value by
more than 1.5 m/min for more than five seconds, wire feed will be stopped.
From machine serial number 514 . . . . . . . the program version of the processor is
changed to P1.02 (the previous version was P1.00, circuit board AP01 with part
number 0486 205 880). The change in the program affects the creep start: see
Creep start / Normal start on page 17.
cmek0de1
cmek0e20
- - 20 - -