Hello,
After the great and good solutions expossed by Andrew Smith, Christian Buil and others , I show the results to my agitator for optical fiber.
Here can see its operation, https://www.youtube.com/watch?v=F_klNTh ... e=youtu.be
It is very possible that the results can be improved. But I think that them are acceptable.
I leave here two graphics wiht Vega's results.
You'll already give me your opinion.
Regards, Joan.