Recent content by wakadarc

Thanks JBA, the calcs make sense. Yes I am using bushings, primarily used to keep the platform horizontal but it will be absorbing/dissipating energy which will help the table from stopping at the dead bottom point

Just to provide a little more background, This is a vibration platform that I will be using to vibrate/"shake" packaged boxes for package integrity testing... Could you explain the 1 inch per .05 sec? 650 RPM = 650 Inchs/Min (in y axis) So in 1 second it travels 10.83 inches (total distance) I...

Well the load on the left of the flywheel will be 250 lbs (vertical load). As suggested from my original post, it may not be significant to require a counterWeight. The 10 lbs I got was through solidworks material properties of steel for the given geometry of the cw't... I do not know how much...

flywheel outside diameter is 6 inches hub diameter is 1.47 in

0.8inches approx

Yes the main bearing is a journal bearing that will be located between the flywheel and the c'wt. it will pretty much take up all the space inbetween the two parts with maybe 0.1-0.2 inch clearance. Check picture below for full assembly. Thank you

So what your saying is the counterweight should be as close to the flywheel as possible? Or even closer I guess if it wasn't for the flywheel blocking it? Right now that's the closest it can be because of space constraint. The counterweight(s) will be made of mild steel...so approximately ~10lbs

The shaft on the left of the flywheel is offset by 0.25 Inches from the center of the flywheel. So it will cause the table to move up and down vertically.

Attached is just the shaft component. So on the left of the flywheel will be the load (250lbs). On the right is the counter weight that I modeled...I do not think its necessary. Flywheel is 6 inches in diameter. The reason why the counterweights are so offset from the flywheel is because there...

I have a crank shaft that lifts a flatplatform up 0.5 inches and down 0.5 inches. The load here is about 250 lbs. So just one load on this 3" long steel shaft with 1 inch thickness. Is it necessary to have a counter weight for this? If so, how much should the counterweight weight? The shaft...

So the offset shaft will fall (or in reality, rotate about the center) at 1.5gs if I have 208 RPM? The centrifugal approach from the link I posted has it higher, 600+ RPM

I am simulating a ball dropping at the top of a circle and the time it takes to reach the bottom, hence using pi. The ball is under the g force.But I've seen this http://www.calctool.org/CALC/phys/Newtonian/centrifugal This calculates the centrifugal force but i need the vertical component to...

I need to determine the RPM just that the flywheel (that has an offset shaft) will travel faster than gravity (g force). Meaning my offset shaft will be falling faster than a falling object per se. So flywheel has a diameter of 0.1524m. h=1/2g*t^2 t=0.144s (assuming we did 1.5x(9.8m/s) with...

So pretty much the acceleration of the platform needs to be greater than 1g at least for the box to have air time. I guess I can just over spec it so that the cube will jump 15mm into the air.

This question might be out of the scope of this forum but, Assume an object (lets say cube) rests on an even floor that at all points is vibrating vertically at the same frequency at all times. (a platform going up and down) The floor is vibrating vertically at a FIXED displacement. How can i...