Signal transmission system for machine tools, inspection machine

Details Signal transmission system for machine tools, inspection machine Signal transmission system for machine tools, inspection machine

1989-04-07

1992-09-29

Will, Thomas B.

Geometrical instruments

Gauge

Coordinate movable probe or machine

33558, 340680, 34082573, 34082572, G01B 503, G08C 1926

Patent

active

051505290

ABSTRACT:
Probes (18A,18B,18C) can be interchangably mounted in the spindle (12) of a machine tool. Each probe has an optical signal transmission system, in which an optical signal from a light emitting diode (26) is transmitted to a receiver module 28. Such an arrangement requires a battery in the probe. To conserve battery power, the probe is normally in a stand-by mode, but can be switched on by an optical signal transmitted from the module 28 to a receiving photodiode 32 on the probe. This switch-on signal is modulated at a different frequency for each probe. Each probe contains a filter for the signal received by the photodiode 32, responsive only to the frequency of modulation of its own switch-on signal. Probes which are not intended to be switched on therefore do not react to the switch-on signal of another probe, thus conserving battery power further.

REFERENCES:
patent: 3639907 (1972-02-01), Greatbatch
patent: 3987414 (1976-10-01), Tuma
patent: 4509266 (1985-04-01), Cusack
patent: 4545106 (1985-10-01), Juengel
patent: 4558509 (1987-04-01), Juengel
patent: 4605925 (1986-08-01), Mark
patent: 4608714 (1986-08-01), Juengel
patent: 4693110 (1987-09-01), Juengel
patent: 4771283 (1988-09-01), Imoto
patent: 4805314 (1989-02-01), Hayashi et al.

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