Fluid handling – Processes
Patent
1997-05-29
1999-10-26
Lee, Kevin
Fluid handling
Processes
25112911, F16K 5100
Patent
active
059709979
ABSTRACT:
An apparatus for effecting actuation of a positioning member and a method for commissioning the apparatus wherein the apparatus includes a controller coupled to a drive motor and adapted to receive an input signal and to apply positioning signals to the drive motor. The positioning signals selectively effect positioning of the positioning member and determine a first position and a second position of the positioning member. The method for commissioning the apparatus selectively includes performing an end stop determination sequence in response to an end stop determination signal, winding a bias member, and determining a range of rotation for the positioning member. The end stop determination sequence seeks to detect the presence of both a load and spring when rotating the positioning member and biasing member, respectively, in one of a first and second direction. The load and spring are detected, if present, by monitoring the rotation of the positioning member and bias member, respectively, to detect a stall before the positioning member and biasing member, respectively, exceed a predetermined position. Similarly, during the wind spring sequence and range sequence, the rotation of the biasing member and positioning member, respectively, are monitored for a stall that indicates that the biasing member is cocked and the end stop of the positioning member is determined, respectively.
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Fuhr David R.
Hudson Hugh F.
Klomberg Peter J.
Ritmanich David C.
Ulicny Dennis J.
Johnson Service Company
Lee Kevin
LandOfFree
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