I have slight problem. I am building an excavator using linear actuators as the hydraulic cylinders. I can’t afford the ones from (budget 30-50 dollars) http://www.firgelli.com/Uploads/L12_datasheet.pdf so i decided to make my own linear actuator from http://www.instructables.com/id/Quick-and-easy-electric-cylinder-prototype-.../ however I am also considering http://makezine.com/projects/make-34/the-mighty-lip-balm-linear-actuator/ as another way to make the linear actuato, the latter using a servo motor with continuous rotation as oppose to the dc motor used in the first one.
One of the requirements of the project is that I show positional control with feedback at differing load conditions. Meaning that if i put want the bucket to move to a specific position it must hold for that position under both no load and heavy loads. Also I have to show that when a heavy load is placed, in the event that it(bucket) moves out of place due to the high load that the it automatically moves back to that position. So with that said, i was thinking that when it moves out of position. Also the only way i see this moving out of position is if the DC motor is physically moved backwards because the actuator’s arms are firmly intact on the bucket joints ( atleast thats what i think it should move out of position to compensate for the movement of the bucket)
Will increasing the torque of the DC motors serve as a solution to keep the bucket in place for the heavier load?
I am accepting any thoughts or ideas. If anyone needs me to clear up my problem I will gladly try to clarify any problems in understanding my situation.