Recent content by Wale

This is very helpful. Thank you very much!

Speed range of 0.5-4 inches/second. Stroke length range of 0.5-4 inches.

To clarify, I only care about one given stroke. So for example a solution where the motor would drive one stroke clockwise at constant velocity, stop, then drive the return stroke counterclockwise, would also work.

Both. I am looking for a theoretical formulation which might then allow me to calculate a numerical solution to program my step motor.

The challenge with ball screw or rack and pinion is that you can't get to high enough speed/frequency.

Again, velocity formula in the piston motion article is for constant rotational speed. Not what I am looking for.

The velocity is sinusoidal if the driving shaft is rotating at constant RPM. I am interested in solving for what the driving shaft rotational speed profile would need to be to drive piston at constant horizontal linear speed. If we focus on just one stroke of piston from left to right (not...

Constant (or near constant) flow rate for each stroke. In other words for a given stroke, I would like for the velocity of the piston to be constant or near constant.

Yes. That is correct.

Yes, you are correct. It will move back and forth, which is what I want because it will be driving a a hydraulic cylinder. What I want is for the hydraulic cylinder strokes to be actuated at constant velocity (aka constant flow rate for the fluid that the cylinder is pushing).

I am trying to design a mechanism which has a hydraulic cylinder driven by a step motor. The motor shaft is connected to the hydraulic cylinder piston via two rods of lengths r and L as shown in the below figure. I want the cylinder's piston to be driven at constant velocity v, so I am trying to...