Greetings all;
I have my project building this drive 2 ways now, making it much more
widely usable and that I seem to have under adequate control for now.
But another problem has nagged at me and that is how do I build the
gearing rings as identical in every was possible by making the outer
walls with identical code, but the inner walls aren't the same, one has
60 splines, and one has 62 which is how I get the 30/1 gear ratio.
And that presents an effective diameter problem because of the varying
amount of overlap at the base of the splines triangles, caused by the
closer spacing of the splines of the 62 spline part which effectively
reduces the center of spline face diameter compared to the 60 spline
part.
What would be the best way to equalize the engagement, basically by
making the outer "valley" depth, the important larger extent of the
ellipse as the loose inner spline belt is driven outward by the rotation
of the central armature, identical. That point in the rotation is the
highest stress point on this loose belt of outward facing splines. The
point is that the tips of the outward facing splines should just touch
the valleys of both the 60 spline ring and the 62 spline ring. Currently
I'm printing and testing half a dozen of each to get a decent fit (and
all this changes when I run out of filament and load another spool in
the middle of making one of these), but I can't visualize how to
calculate it to reduce the time and plastic waste to get a working
version.
Does anyone have an idea how to make this "self compensating"?
If you want to contaminate your thinking, the code is now posted
as "master.scad", in the Genes-os9-stf link off my web page in the sig.
Around line 580 is where you change the "mode" to build the various
parts.
Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
Greetings all;
I have my project building this drive 2 ways now, making it much more
widely usable and that I seem to have under adequate control for now.
But another problem has nagged at me and that is how do I build the
gearing rings as identical in every was possible by making the outer
walls with identical code, but the inner walls aren't the same, one has
60 splines, and one has 62 which is how I get the 30/1 gear ratio.
And that presents an effective diameter problem because of the varying
amount of overlap at the base of the splines triangles, caused by the
closer spacing of the splines of the 62 spline part which effectively
reduces the center of spline face diameter compared to the 60 spline
part.
What would be the best way to equalize the engagement, basically by
making the outer "valley" depth, the important larger extent of the
ellipse as the loose inner spline belt is driven outward by the rotation
of the central armature, identical. That point in the rotation is the
highest stress point on this loose belt of outward facing splines. The
point is that the tips of the outward facing splines should just touch
the valleys of both the 60 spline ring and the 62 spline ring. Currently
I'm printing and testing half a dozen of each to get a decent fit (and
all this changes when I run out of filament and load another spool in
the middle of making one of these), but I can't visualize how to
calculate it to reduce the time and plastic waste to get a working
version.
Does anyone have an idea how to make this "self compensating"?
If you want to contaminate your thinking, the code is now posted
as "master.scad", in the Genes-os9-stf link off my web page in the sig.
Around line 580 is where you change the "mode" to build the various
parts.
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
