Connecting Optional Emergency Stop Push Button; Section 3 - Operational Terms - Miller Robotic Interface II Owner's Manual

2-3. Connecting Optional Emergency Stop Push Button

WARNING
ELECTRIC SHOCK can kill.
•
Do not touch live electrical parts.
•
Turn Off robot, welding power source, and interface unit, and disconnect input power before inspecting or installing.
2
Tools Needed:
1/4 in
Figure 2-3. Connecting Optional Emergency Stop Push Button
SECTION 3 – OPERATIONAL TERMS
The following is a list of terms and their definitions as they apply to this interface unit:
General Terms:
Adaptive Pulse Welding
Abk (Background
Amperage)
Apk (Peak Amperage)
Inductance
PPS (Pulses Per Second)
PWms (Pulse Width in
Milliseconds)
Synergic
Trim
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When the "adaptive pulse" welding process is selected, the unit will automati-
cally regulate pulse frequency in order to maintain a constant arc length, re-
gardless of change in welding wire stickout.
Abk is the low weld current. Background current preheats welding wire and
maintains the arc. When background current is too low, the arc is unstable and
hard to maintain.
Apk is the high pulse of welding current. Peak current melts the welding wire
and forms a droplet. The droplet is forced into the weld puddle.
In short circuit GMAW welding, an increase in inductance will decrease the
number of short circuit metal transfers per second (provided no other changes
are made) and increase the arc-on time. The increased arc-on time makes the
pool more fluid.
PPS, pulse rate, and frequency (Hz) are used interchangeably. A PPS or pulse
rate of 60 Hz means 60 pulses of current are produced each second.
PWms is the time spent at peak current (1.2 ms is .0012 seconds). This time
must be long enough to form a droplet of welding wire. The stiffness or fluidity
of the molten weld puddle is controlled by PWms.
Synergic refers to the unit's ability to use preprogrammed pulse parameters to
determine the actual pulse settings of Peak Amperage, Background Amperage,
Pulse Frequency and Pulse Width at any specific wire feed speed setting.
Term used to represent arc length adjustments in pulse programs. Increasing
trim increases the actual arc length. Likewise, decreasing trim shortens arc
length. Trim is replaced by volts in MIG programs.
Terminal strip 2T provides connec-
tion points for an optional normally
closed Emergency Stop (E-stop)
push button. To make connections,
proceed as follows.
Remove top cover.
1 Terminal Strip 2T
2 Strain Relief
Loosen strain relief and insert leads
from normally closed E-stop push
button. Route leads to 2T.
Remove jumper link across termi-
nals A and B on 2T. Keep for future
1 use.
Connect one lead from E-stop
switch to terminal A and the remain-
ing lead to terminal B.
Tighten strain relief and reinstall top
cover.
swarn1.1* 2/93
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