Hi Guys,
I have to actuate a lever and I could use pnuematics but not hydraulics. I would prefer not to use pnuematics though - which leaves me with a CAM and gear motor.
Here is what I want to accomplish:
The device being moved requires 600 pounds of force. There is going to be a lever attached to this which will give me a 3:1 advantage. So, I need to have a way of pushing against that lever with 200 pounds of force. As this is all in the design stage, I have some wiggle room on design at this time.
What I don't have a clue about, is determining the amount of torque required from a gear motor to drive a cam, which in turn pushes against that lever.
The diameter of the cam will be about 1" and, being round, I would only have 1 rotation to go from full lift - to full retract. I need to travel about .120" at the CAM side of the lever (resulting in .040" of travel at the final object).
I was thinking if I mounted the cam on it's own axel, then drove the cam with small gear motor, I could get the lift I need. But I have no way of estimating or calculating the torque required to move such a load.
I realize the trade off between speed of acutation and gearing as well. But if I can determine the required torque, I can select a gear motor with enough speed to be acceptable. There isn't much concern at all for duty cycle, this isn't something that get acutated every 10 seconds - rather, more like every couple of minutes or so.
Can anyone help with this?
As I mentioned, I am flexible within limits - this has to fit in a pretty small area which usually makes pnuematics best.
Thanks guys!
Chris