Arrangement for operating an electronically controlled sewing ma

Details Arrangement for operating an electronically controlled sewing ma Arrangement for operating an electronically controlled sewing ma

1982-06-28

1983-07-19

Nerbun, Peter P.

Sewing

Work manipulating

Guides

112158F, D05B 302, D05B 7900

Patent

active

043937969

ABSTRACT:
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.

REFERENCES:
patent: 4256047 (1981-03-01), Suzuki et al.
patent: 4274348 (1981-06-01), Kato
patent: 4342271 (1982-08-01), Socha

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