Lincoln Electric PRECISION TIG 275 - Manual (Page 27)

B-12 OPERATION B-12
PRECISION TIG 275
Max. to Min.
Amptrol
Min. to Max.
Amptrol
Setup f or TIG Ampt rol Weld ing
Ad vanced P anel
(If us ed)
Standa rd Controls
Power Switch
ON
Polar ity S witc h
AC or DC -
Mode Switch
TIG
AC Balance
AUTO
or
Set:
More + for alum.oxide "Cleaning"
w/o "Sp
itting" or "wetting" loss.
Balanced for equal + and - current.
More -
fo r higher "Penetration".
Local/R emote
Switc h
REMOTE
Trigge r Switch
2-STEP
Pulse S witch
ON or OFF
Pulse Freque ncy
4-6 pps is a typical initial setting.
Set for bead shape and travel speed:
Higher for thinner plate and faster travel.
Lower for thicker plate and slower travel.
% On Time
40-60% is a typical initial setting.
Set for total heat of Peak current:
Lower reduces distortion and burn-thru.
Backgr ound Cu rre nt
40-60% is a typical initial setting.
Set as low as will maintain a pulse arc
(Will not drop below Min.Output setting.)
Downslope
ZERO
For no arc-out delay.
Minimum O utput
Press Display switch
and Set to desired min.
Amptrol (Start/Crater)
output level.
Postfl ow
Set as low as required.
Higher for larger
tungsten and current.
Maximum O utput
Set to desired max.
Amptrol output level.
FIGURE B.6