SERVICE MANUAL
TRANSTIG 200 Pi
March 31, 2008
4-11
4.12 Pulse Controls
(Pulse Width)
(Pulse Frequency)
(Peak Current)
(Base)
Background Current
Art # A-05070
Figure 4-7: Pulse Controls
The Pulse controls are used primarily to control heat
input. Pulse offers a number of advantages as follows:
1) Control puddle: size and fluidity (especially out of
position).
2) Increase penetration
3) Travel speed control
4) Better consistent quality
5) Distortion on lighter or thinner materials.
Pulse-current provides a system in which the welding
current continuously changes between two levels.
During the periods of Peak current heating and fusion
takes place and during the background (base) current
periods, cooling and solidification take place. Pulse
Width is the time in one cycle the current stays at the
peak current setting. Pulse Frequency measured in
Hertz is the number of cycles per second the current
travels between peak and background current
settings. It is as if the foot rheostat were moved up
and down to increase and decrease the welding
current on a regular basis. The faster you moved the
foot rheostat up and down the faster the frequency.