Paul M Romslo

US Patent:

20040074877, Apr 22, 2004

Filed:

Oct 18, 2002

Appl. No.:

10/274506

Inventors:

Keith Hochhalter - Dayton MN, US
Paul Romslo - Robbinsdale MN, US
Troy Erickson - Annandale MN, US

International Classification:

B23K011/10

US Classification:

219/086410

Abstract:

An adaptable, servo-control system for force/position actuation generally includes an electric linear actuator and a controller. The controller interfaces with the electric linear actuator and with a number of I/O signals that are independent from the electric linear actuator. The controller interface to the independent I/O signals is transparent to the manner in which the I/O signals are produced. Rather the controller simply looks for the status of the I/O that is preferably received into the controller by hard-wiring or field bus I/O messaging such as from a industrial robot or programmable logic controller. The controller utilizes the I/O signals to select a number of parameters to generate a motion profile for closed loop-controlled, position actuation or force actuation of the electric linear actuator. The adaptable servo-control system is particularly suited to resistance weld systems wherein the electric linear actuator can replace the pneumatic actuator providing position and force actuation of the weld tip of the welding gun.

US Patent:

20050077855, Apr 14, 2005

Filed:

Dec 3, 2004

Appl. No.:

11/004248

Inventors:

Keith Hochhalter - Dayton MN, US
Paul Romslo - Robbinsdale MN, US
Troy Erickson - Annandale MN, US

International Classification:

G05B019/10

US Classification:

318567000, 219086320

Abstract:

An adaptable, servo-control system for force/position actuation generally includes an electric linear actuator and a controller. The controller interfaces with the electric linear actuator and with a number of I/O signals that are independent from the electric linear actuator. The controller interface to the independent I/O signals is transparent to the manner in which the I/O signals are produced. Rather the controller simply looks for the status of the I/O that is preferably received into the controller by hard-wiring or field bus I/O messaging such as from a industrial robot or programmable logic controller. The adaptable servo-control system is particularly suited to resistance weld systems wherein the electric linear actuator can replace the pneumatic actuator providing position and force actuation of the weld tip of the welding gun.

US Patent:

20070187370, Aug 16, 2007

Filed:

Nov 21, 2006

Appl. No.:

11/562139

Inventors:

Keith Hochhalter - Inverness IL, US
Florinel Ciubotaru - Minnetonka MN, US
Paul Romslo - Robbinsdale MN, US

International Classification:

B23K 11/11

US Classification:

219086320

Abstract:

A method and apparatus for positioning electrodes relative to a welding gun and for providing equalization relative to the electrodes of an opposed welding device. The apparatus includes a servo driven linear actuator and a controller integrated into a single housing. The method is directed to a control for the servo actuator which maintains substantially equal pressures between the electrodes and the workpiece during a welding operation.