Probe positioning actuator

Details Probe positioning actuator Probe positioning actuator

1991-07-19

1992-10-06

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Linear

310 12, 324158P, H02K 4100

Patent

active

051534720

ABSTRACT:
An actuator for use in positioning a probe. The actuator has a magnet, two C-shaped cores on opposite sides of the magnet, an electromagnetic coil, and an armature movably connected with the cores. The armature has a projecting face located over portions of both pole faces for each core for the entire range of motion of the armature. The armature is primarily retained with the cores by magnetic attraction by the magnet. The actuator also has an armature position sensor which can include either an optical sensor or a magnetic sensor. A test probe is mounted to the armature which can be preloaded and have dual springs to prevent scrubbing and increase contact force with an object being tested.

REFERENCES:
patent: 3351006 (1967-11-01), Belson
patent: 3857075 (1974-12-01), Sawyer
patent: 4099106 (1978-07-01), Nikaido
patent: 4423361 (1983-12-01), Stenudd et al.
patent: 4480202 (1984-10-01), Leutner et al.
patent: 4506215 (1985-03-01), Conglin
patent: 4518910 (1985-05-01), Hottenrott et al.
patent: 4761574 (1988-08-01), Nakagawa
patent: 4769565 (1988-09-01), Teramachi
patent: 4785210 (1988-11-01), Maruyama et al.
patent: 4786832 (1988-11-01), Nagakawa et al.
patent: 4788477 (1988-11-01), Teramachi
patent: 5006793 (1991-04-01), Gleason et al.
"Constant Velocity Systems Using Sawyer Linear Motors" by Nordquist et al., Fifteenth Annual Symposium, Incremental Motion Control Systems Society, Jun. 1986, pp. 215-231.
"Two-Axis Sawyer Motor For Motion Systems" by Pelta, IEEE Control Systems Magazine, Oct. 87, pp. 20-24.

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