Tweco 6000 CE Merlin - Manual (Page 45)

Manual 0-2601 4-9 OPERATION
ful if the system is used to replace other units which
do not have auto-restart, or for use with motion con-
trol devices. In many applications, torch parts life may
be improved by disabling auto-restart to reduce ex-
cessive pilot arc time.
NOTE
Either pole set to 1 (on) disables auto-restart func-
tion.
A u to -R estart
F u n ctio n
SW 1-1
Po sitio n
SW 1-2
Po sitio n
Enabled 0 (O ff) 0 (O ff)
D isabled 0 (O ff) 1 (O n)
D isabled 1 (O n) 0 (O ff)
D isabled * 1 (O n) 1 (O n)
* = F actory Setting
B. Auto-Restart Mode (SW2)
ON
OFF
1 2
SW2
A-00992 Logic PC Board
Figure 4-9 Auto-Restart Mode Switch SW2 Location
Normal mode provides an immediate pilot restart
whenever the main arc is interrupted and the Auto-
Restart switch SW1 is set to ENABLE. Delayed mode
provides a gas pre-flow each time before the pilot arc
restarts. In some shape-cutting applications, it may
not be desirable to immediately restart the main arc
after the torch passes beyond the desired cutting line
(or between cuts).
NOTE
Either pole set to 1 (on) sets delayed auto-restart
function.
A u to -R esta rt
Mo d e
SW 2-1
Po sitio n
SW 2-2
Po sitio n
N o rmal * 0 (O ff) 0 (O ff)
D e laye d 0 (O ff) 1 (O n)
D e laye d 1 (O n) 0 (O ff)
D e laye d 1 (O n) 1 (O n)
* = F actory Sett ing
C. Gas Pre-Flow Delay (SW3)
ON
OFF
1 2
SW3
A-00993 Logic PC Board
Figure 4-10 Gas Pre-Flow Delay Switch SW3
Location
The pre-flow delay allows time for gases to flow to
the torch when the torch is activated. Pre-flow is im-
mediately followed by pilot arc initiation Pre-flow
durations are factory set but extended torch leads may
require longer pre-flow durations.