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AssigneeThe Singer Company
InventorsWilliam H. Dunn, Leonard I. Horey, Marvin Kurland
Estimating the term…
An electronically controlled sewing machine includes an arrangement for operating the machine in a diagnostic mode, wherein several tests for checking the functioning of the sewing machine can be performed. In a first test, all of the light emitting diodes on the panel of the sewing machine are sequentially energized. This verifies proper operation of the display panel. In a second test, a particular light emitting diode responds to the armshaft sensor such that it is dark when the needle is up and is illuminated when the needle is down. The motor speed function is monitored by a test which lights particular light emitting diodes in 100 stitches per minute increments of motor speed. Proper overall operation of the sewing machine, including the actuators, is monitored by running several test patterns. To isolate a possible fault in the sewing machine foot controller, the sewing machine may be run at a preset speed without depressing the foot controller.
An electronically controlled multiple pattern sewing machine having operator controlled input means for selecting functions to be performed by said sewing machine, indicating means for providing an indication of the function selected by an operator via said input means, diagnostic means for operating said sewing machine in a diagnostic mode, said diagnostic means utilizing said indicating means for providing an indication to said operator of the operation of said sewing machine while in said diagnostic mode, and operator controlled means for selectively causing said diagnostic means to be operative.
Dependencies are inferred from the claim text.