Slow acceleration starting (code 7926 and above), B-12, Flux tank loading – Lincoln Electric LN-8 SVM132-A User Manual
Page 36: Operation
B-12
OPERATION
B-12
SLOW ACCELERATION STARTING
(CODE 7926 AND ABOVE)
The LN-8 has the capability of optimum starting for dif-
ferent processes. This is accomplished by designing
the LN-8 to start with two different speeds of con-
trolled acceleration. As shipped, the unit is connected
for fast acceleration, which is best for most open arc
procedures. The slower acceleration may be more
desirable for long stickout applications and most sub-
merged arc procedures. If the electrode being used
does not give satisfactory starting because of “stub-
bing” or “blast off”, the slower acceleration can be
obtained by modifying the LN-8 as follows:
1. Turn off the control power to the LN-8 at the
power source.
2. Remove the screws holding the control section
cover in place and swing open.
3. Switch circuit #1 of S1 on the Control PC board
from position “F” to position “S”.
4. Reassemble.
FLUX TANK LOADING
Either turn off the incoming air line or remove the
quick disconnect if one has been installed. Slightly
loosen the tank cap and let the air in the tank escape
in the holes in the side of the cap. After pressure has
been released, remove the cap from the tank. Using
the funnel provided, put 100 pounds of flux in the tank.
It is very important that only new or properly reclaimed
flux be put in the tank. Coarse particles and/or mag-
netic particles will stop the flux feeding process. New
Lincoln flux is properly screened at the factory. All
reclaimed flux must be separately screened through a
vibrating screen with 0.065 to 0.075 in. openings and
be put through a magnetic separator. The K310 vibrat-
ed screen and K58 magnetic separator are available
for this purpose. The screen in the funnel supplied
with the tank has much larger openings and its only
purpose is to keep paper and slag out of the tank.
Screw the tank cap back on and tighten hand tight.
Reconnect the incoming air supply.
There will always be a small amount of air and possi-
bly drops of water coming out of the end of the tube
coiled under the tank. This is an automatic disposal
system in case the plant air has water and dirt in it.
LN-8