Lincoln Electric IM649 manual Close the Adaptive Loop / Adjust the Peak Voltage

Appendix A PULSE WAVE SHAPING PRINCIPLES A-9

3.Close the Adaptive Loop / Adjust the Peak Voltage

a.If the adaptive stickout window is not open, click on the button to open the window. Select the adaptive option to close the adaptive loop. Verify that the adaptive button lights up.

NOTE: When on-line with the adaptive loop closed, the wave shape parameters will be adapted (change) to maintain constant arc length. Adjusting one parameter in Wave Designer often forces the adaptive feature to modify other wave shape parameters. The adaptive nature of the program may be noticed when editing the parameters; changing one parameter value causes other parameter values to change in response. We recommend not changing pulse variables in the adaptive mode.

b.While the adaptive loop is closed, the peak voltage value displayed in the adaptive stickout window is adjustable. While welding a trial bead, adjust the peak voltage for an optimal arc length.

c.If desired, adjust the inductance value to achieve the desired weld pinch. If the inductance value is set too high, it will limit the rate of current change and may limit the ramp-up rate and tailout speed.

4.Select an Adaptive Type (Optional)

a.Click on the button on the Waveform Editor screen to view the Adapting Stickout screen. Click on the arrow in the adaptive type box to display the adaptive types listing.

b.Select each adaptive type in-turn and perform a trial weld. After performing a trial weld for each adaptive type, select the adaptive type best suited to the wire feed speed. A brief summary of the adaptive type characteristics is presented in Table A-1.

TABLE A-1. ADAPTIVE TYPE CHARACTERISTICS.

Adaptive Type	*Characteristics	Application
Sandia	Stepoff and background	lower wire feed speeds and where consistent
	30%, frequency 45%	pulse values for droplet detachment are
		required
Fresa	Peak current 10%, stepoff	intermediate wire feed speeds
	and background 30%,
	frequency 45%
Manzana	Peak current 20%, stepoff	high wire feed speeds; peak current is the
	and background 10%,	controlling variable
	frequency 30%
Naranja	Peak current and time 10%,	where highest range of peak adaptive control
	stepoff and background	is required
	10%, frequency 30%
Mora	Frequency 60%	typical for most pulse GMAW welding
		machines

*Each adaptive type specifies which parameters are being adapted and the sensitivity of adaptiveness for each parameter. For example, Mora type adapts only one parameter — frequency — at a sensitivity level of 60%. In developing waveforms, try each adaptive type to determine the most desired result.

WAVE DESIGNER