Looking for a hydraulically damped pulley

[Oszkar]

I have to repeatedly drop a 1Kg load through 2m at about .3m/s. At first a hydraulic rate controller looked attractive until I found that they tend to be used for much greater forces and get very expensive at longer travels. An apps guy suggested I look for some sort of damped pulley. One could call it a dynamometer. Any ideas?

 

[Pekelder]

There are rotational dampers available that you can set to give a desired speed given a certain load. Look at

http://www.dictator.de

and look for hydraulic dampers, radial dampers.

Other companies also have them, look around.

Regards,

Pekelder

 

[nbucska]

For a small weight like this a magnetic damper should work, too. You could even use it with an encoder or tachometer
in a closed loop

<nbucska@pcperipherals.com>