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What diameter?How long?How far does it need to move?How fast does it need to move?Can the rod rotate as it moves linearly or not?Is there any force, resistance to the motion?
Needs to move 1.25inI want to move back and forth about 15 times per second.It needs to hit and open valve that has about a 10 or 15lb spring.
Hi,Quote from: aukirko on June 06, 2010, 05:47:39 PMNeeds to move 1.25inI want to move back and forth about 15 times per second.It needs to hit and open valve that has about a 10 or 15lb spring.This equates to 900 RPM and assuming a distance from center of a rotating "wheel" of 5/8" it will need a torque of at least 154 ozf-in (if I didn't screw up on the math).If it is possible to change the spring to a softer one, you can make do with a less powerfull motor.If this is for a paint ball gun (?), you need to consider how much runtime you need and how large a battery you wanna drag around.If you describe the actual purpose, perhaps some other (less power hungry) means could perhaps be found, but it's difficult without that knowledge.