by ArtF » Thu Jan 23, 2020 12:27 pm
Tweaky:
Looks pretty good. Ill be interested in how you find it works.
I have a few lazy susan bearings that will be used as my
axis drive. They have a large enough hole in the middle to
contain the center bearing and should ease that rotational friction
you may hit with the small offset circular parts.
Keep posting your experience.. Ill post my first stage when
its cut.
You know I have a conjecture on the number of pins needed to
be used on the outside ring. If, for example, you use 21 outside pins,
you get a 20:1 reduction, but my thought is that you need use
only the number of pins in construction as determined by torque
requirement. The number of pins used must be (n > 2) for any
ratio above 2.
So a 20:1 reduction could in construction use as few as 3 pins
if the torque requirement is low. I intend to use 3 pins on each
of 4 stages to reduce a clubfoot to the hour hand.
Dunno how that will work out, but simulations seems to show
a min of 3 should do the job.
Art
Tweaky:
Looks pretty good. Ill be interested in how you find it works.
I have a few lazy susan bearings that will be used as my
axis drive. They have a large enough hole in the middle to
contain the center bearing and should ease that rotational friction
you may hit with the small offset circular parts.
Keep posting your experience.. Ill post my first stage when
its cut.
You know I have a conjecture on the number of pins needed to
be used on the outside ring. If, for example, you use 21 outside pins,
you get a 20:1 reduction, but my thought is that you need use
only the number of pins in construction as determined by torque
requirement. The number of pins used must be (n > 2) for any
ratio above 2.
So a 20:1 reduction could in construction use as few as 3 pins
if the torque requirement is low. I intend to use 3 pins on each
of 4 stages to reduce a clubfoot to the hour hand.
Dunno how that will work out, but simulations seems to show
a min of 3 should do the job.
Art