Electricity: motive power systems – Positional servo systems – With compensating features
Patent
1984-12-12
1986-05-27
Dobeck, B.
Electricity: motive power systems
Positional servo systems
With compensating features
318 8, 318 48, 318663, G05D 23275
Patent
active
045917728
ABSTRACT:
A load positioning system with gravity compensation has a servo-motor (12), position sensing feedback potentiometer (38) and velocity sensing tachometer (42) in a conventional closed-loop servo arrangement to cause lead screw (14) and ball nut (20) to vertically position load (22). Gravity compensating components comprise the DC motor (32), gears (34) and (36), which couple torque from motor (32) to the lead screw (14), and constant-current power supply (37). The constant weight of the load (22) applied to the lead screw (14) via the ball nut (20) tends to cause the lead screw (14) to rotate, the constant torque of which is opposed by the constant torque produced by motor (32) when fed from the constant-current source (37). The constant current is preset as required by potentiometer (54) to effect equilibration of the load (22) which thereby enables the positioning servo-motor (12) to "see" the load (22) as weightless under both static and dynamic conditions. Positioning acceleration and velocity performance are therefore symmetrical.
REFERENCES:
patent: 2415679 (1947-02-01), Edwards et al.
patent: 2789260 (1957-04-01), Curtis et al.
patent: 3408868 (1968-11-01), Shaughnessy
patent: 3434025 (1969-03-01), Parkinson et al.
patent: 3771032 (1973-11-01), Hender
patent: 3854378 (1974-12-01), Vogel
patent: 4022064 (1977-05-01), Preston
patent: 4126818 (1978-11-01), Taylor
patent: 4301528 (1981-11-01), Leri
patent: 4323828 (1982-04-01), Terada et al.
patent: 4373147 (1983-02-01), Carlson, Jr.
patent: 4375047 (1983-02-01), Nelson
Brekke Darrell G.
Dobeck B.
Manning John R.
Marchant Robert D.
The United States of America as represented by the Administrator
LandOfFree
Load positioning system with gravity compensation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Load positioning system with gravity compensation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Load positioning system with gravity compensation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1572716