vision system mount question

[jberge1]

Hi all,
Background: I have a vision system mounted to a piece of automation with a precision link conveyer. Right now the vibration from the feeder bowls are causing some problems for the camera. I'd like to mount the camera with a custom bracket to the base of the machine, rather than to the converyor like it is now, but with some rubber sandwhich mounts from mcmaster.

The question part: The rubber sandwhich mounts are rated for a maximum load, but does this take into account excitation frequency, acceleration, amplitude etc.? I'm considering a more analytical approach such as buying a vibration meter that measures displacement and acceleration, and making sure the natural frequency of my camera bracket/sandwhich mount system is far away enough from the excitation frequency that my amplitude is small enough. Any ideas?
Thanks

 

[alexit]

Anti-vibration mounts are usually rated for load at zero amplitude. If your close to max weight, add extra mounting location. Do simple calc with lenght of needed mount, mass of camera and now you know excite frequency (close enough.)

If machine frequency is very high, cameras with internal vibration dampening are available too (Sony, Weldex, etc.)

 

[amorrison]

Maybe what you meed is "image stabilization".

http://images.google.ca/imgres?imgu...es?q=+Image+Stabilization+&svnum=10&hl=en&lr=

 

[jberge1]

thanks for the replies,
using a stabilizer would work but this is a fully integrated computer/camera vision system by allen bradley. The camera is basically a cylinder about 1" in diameter, and this feeds directly to the computer which compares parts it sees against a trained "normal." I'm forced to design a mount to isolate the base excitation.

 

[amorrison]

I hope you get a better answer than this but for a simple empirical answer . . .

1. remove camera
2.put some soft foam or rubber material were the camera was mounted
3. Put a large weight (several pounds?)- as much as the support will carry on the foam/rubber and then mount the camera on top of the weight - tape in place for trials.
4. revise above to make it look more professional.

OR

Mount the camera on an object "some distance away" and change the lens (zoom) if necessary.