Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Patent
1996-12-09
1997-11-18
Sircus, Brian
Electricity: motive power systems
Positional servo systems
With protective or reliability increasing features
318625, 318 49, G05B 1910
Patent
active
056891610
ABSTRACT:
Multiple motion controllers for controlling servo motors are connected by a digital communications link so that controlled axes of the motion controllers may be slaved together regardless of their physical proximity. A given controller broadcasts position or command signals on the communications link in response to a request report message from any other controller. A second request report message may stop the broadcasting to conserve link capacity. Time shifting implicit in the link messages is corrected by estimating the velocity of the master axis and extrapolating the position to the local axes' time of updating.
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Fugere Michael A.
Halpert David E.
Allen-Bradley Company Inc.
Baxter Keith M.
Horn John J.
Miller John M.
Sircus Brian
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