Miller Electric Welder Teaching a Pulse Welding Program, Setting Postflow Sequence Display

9-5. Setting Postflow Sequence Display

1	> Poflw
	0.0 Sec

Poflw

> 0.0 Sec

Parameter Set Desired Time Select

Increase/

Decrease

>Poflw

1.2 Sec

Parameter

Select

Increase

Proceed to next Section.

1 Postflow Parameters Display

Postflow can be adjusted from 0-9.9 seconds. If value set is zero (0), there is no Postflow sequence.

SECTION 10 – TEACHING A PULSE WELDING PROGRAM

NOTE

See GMAW-P (Pulsed MIG) Process Guide supplied with unit for more information.

10-1. Pulse Waveform Explained

Amps (Current)

3

1 2 4

Time

This unit controls weld output for pulsed welds.

1Apk – Peak Current Of 100-600 Amperes

Apk is the high pulse of welding cur- rent. Peak current melts the weld- ing wire and forms a droplet. The droplet is forced into the weld puddle.

2Abk – Background Current Of 10-255 Amperes

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.

3PPS – Pulses Per Second Of 20-400

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.

4PWms – Pulse Width Of 1.0-5.0 Milliseconds

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.

Vpk = Peak Voltage

Arc Voltage during peak current phase of the pulse waveform. This determines arc length during adaptive pulse welding.

Ref. S-0259

OM-196 188 Page 90