Servo's
Bob A
Posts: 10
I am planning to build a combat warship . I wish to control the gun fire control system with a bs2p stamp. the principle will be to,#1 turn the gun director ( a camera attached to a Continous rotation servo),with the right stick of a radio control transmitter, #2 line up with a target, #3 have all gun turrets line up with the target using continous rotation servos, driving a belt drive system to each turret. Here is the question. Do continous rotation servos know wher they are in respecr to center? Do they even have a center? If not , what can I substitute for a servo to drive these turrets, that can be controlled to each degree of the compass. It must be able to return to center when the stamp tells it to. This project is still in the planning stage , and I already have the stamp , a servo controller, and a dozen servos, both continous and 180 degree. ·I'm not ready to program yet I need to get the parts first then come back for programing help.
Bob
Post Edited (Bob A) : 12/12/2005 3:20:14 PM GMT
Bob
Post Edited (Bob A) : 12/12/2005 3:20:14 PM GMT
Comments
I think we've had this discussion before, or one like it in a past thread where you wanted to use a servo to move the BOE's power switch.
Continuous rotation servos are very open-loop. They'll line up the first time, but it will get worse with each attempt to go to home and line up again. Their "center" is a stopped position, but it could be anywhere on the 360 of rotation. You could devise a method with a potentiometer mounted on the servo horn for feedback to obtain a precise direction, or stick with standard servos. I've seen some 270 degree standard servos out there which could do the job if you can handle less than 360 of rotation.
Ken Gracey
Parallax, Inc.
Bob
Bob