Vibration Issue from Shaft Alignment 1

[mech100]

I have a direct drive motor application and am getting alot of vibration from the misalignment of the output shaft.

This is for a high volume production product so I won't be using any precision components. The system needs to be robust enough to handle some generous tolerances.

I am looking at anti-vibration mounts for the motor and/or a self-aligning shaft coupler for the output shaft. Can you give me some ideas on where to find some inexpensive, easily packaged in a small environment, components that will suit this application.

 

[electricpete]

Fabreeka.com has a lot of vib absorbing equipment.

 

[plawrence]

I'm sure I don't understand the setup you have, but why wouldn't you align the shaft?

How generous is "generous tolerances"? Magnetic couplings can handle up to around 0.1" of offset.

Patrick

 

[mech100]

The motor mounts directly to a piece which houses my input shaft, making the alignment based on the geometry of the three motor mount holes to the input shaft bearing hole.

The "generous tolerances" I speak of will be a combination of concentricity as well as angularity for the shaft alignment.

I'm looking at about 0.2mm tolerances on all features and am not sure of the final stack-up quite yet. My best guess would be max. of about 0.025" offset and 5 degrees.