US 9,808,882 B2
System and method for controlling wire feed speed
Richard Martin Hutchison, Iola, WI (US)
Assigned to ILLINOIS TOOL WORKS INC., Glenview, IL (US)
Filed by ILLINOIS TOOL WORKS INC., Glenview, IL (US)
Filed on Jun. 25, 2014, as Appl. No. 14/314,981.
Prior Publication US 2015/0375331 A1, Dec. 31, 2015
Int. Cl. B23K 9/12 (2006.01); B23K 9/095 (2006.01); B23K 9/073 (2006.01); B23K 9/09 (2006.01); B23K 9/173 (2006.01)
CPC B23K 9/125 (2013.01) [B23K 9/0735 (2013.01); B23K 9/09 (2013.01); B23K 9/0956 (2013.01); B23K 9/173 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling a welding system comprising:
receiving an input via an operator interface relating to an operator preference;
providing a welding wire to a welding torch at a first wire feed speed;
providing a pulsed power output to the welding wire via a contact point of the welding torch;
determining, utilizing a sensing system, a contact-point-to-work-distance (CPWD) between the contact point and a workpiece, wherein determining the CPWD comprises determining an arc length based at least in part on the pulsed power output, determining a resistance of a powered portion of the welding wire based at least in part on the pulsed power output, determining an electrode extension based at least in part on a functional relationship between the resistance and the electrode extension, and determining the CPWD based at least in part on the arc length and the electrode extension; and
changing, utilizing a controller, a wire feed speed of the welding wire to a second wire feed speed during an operator-controlled weld based at least in part on the determined CPWD and the input of the operator preference received via the operator interface.