How about a semi-rigid urethane adhesive bonding the flex ring to a rigid metal
hub? Have some interlocking features on the inside of the ring and edge of the
hub to keep it from shearing apart. Smooth-On makes a primer called UreBond II
that makes their urethane resins and rubbers stick to almost anything.
On Wednesday, January 27, 2021, 2:14:26 PM MST, Gene Heskett
<[email protected]> wrote:
On Wednesday 27 January 2021 15:35:00 Gregg Eshelman via Emc-users wrote:
> Instead of a one piece flex cup, how about making a flex ring that
> connects to a rigid base with teeth or pins - something that
> interlocks but allows radial movement of the flex ring with respect to
> the base? No constant bending back and forth to break the print layers
> apart.
I can visualize that but with only one bearing on the driver armature, so
the formerly flex ring is trapped between the bearing and the outer 2
parts. This would have the added advantage of needing only a 1 tooth
difference, but would probably need a counterweight opposite the bearing
as we've seen in cycloid designs, probably weighing as much as the
bearing and floating ring combined for decent balance.
Or, still thinking outside the box, even the triplet of small bearings on
one end of the driving armature. Or better yet, a circular disk with a
lot of empty space in it to keep the ring from flexing so much as it
fly's around, with a smaller cheaper bearing centered in that disk, but
being swung on an offcenter pin on the driving axle. With Sams fine
teeth, but only a 1 tooth difference, a possible 400/1 ratio?
The moving output ring might need to be restrained from resonane effects
by a BIG and costly bearing in the final version but bolted to a stiff
disk with a smaller double bearing'd output shaft might do for testing
to see if its practical.
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