Design of an advanced gearing mechanism

[DRibei]

Hi,

I have been asked to improve the accuracy of a gear system that control angle blades to perform with a micro compressor.

In the actual automated mechanism,blade adjustment works via a planetary gear. The 6 blades are connected via a crown gear.
One of the satellite gears is connected to a stepper motor, driving the assembly.

Here the problem, is the backlash between the gear wheels and the crown gear that results in large position tolerances.

I'm thinking in design a cycloid/harmonic gear train or a dual path gear train in order to increase the thickness of teeth in contact and with that
reduce the clearance between tooth space.

The problem is that cycloidal drive and the current bevel system are different in terms of orientation of the shafts ( Cycloidal is parallel and bevel is perpendicular). So I would like to know if anyone has better a solution to reduce backlash of bevel gears/crown gear system. Maybe a Spiroyd Gear System?


Any leads would be appreciated.

 

[3DDave]

I'm only familiar with using linkages or cam slots for this purpose.

 

[geesamand]

Is there are reason you're not holding these angles using servomotors that are specifically designed for minimal backlash?

I'm sure there are answers but I would exhaust commercial options first and enjoy the fruits of their intellectual labor.