functional gears

[lehmann]

Hi,
I'm brand new in this forum and send best wishes from germany.
I playing round with functional gears and want to ask if there is any possibility to create a helical functional gear. I have the need to create a functional movement with a very smooth running gear with as less as possible friction.
Has anybody an idea or info how to make it  work.
I printed the spur gear Version and it runs good and does exactly want it was planned for.
Next step would be the helical Version.
Have a look on the polar-file.

Thanks in advance.

[ArtF]

Hi Lehman:

At this point I haven't implemented non circulars in helical form..  I don't think Ill be doing do,
mainly because the algorithm that does the work is a virtual hob, so I "think" a conversion to
doing it as a helical, specifically in non circulars would be alot fo torture. In a non-circular each tooth as it progresses
across the face would require a different shape to be accurate.. it sounds .... difficult... (But I will investigate the possibility)

Art

[Nate]

I'm brand new in this forum and send best wishes from germany.
I playing round with functional gears and want to ask if there is any possibility to create a helical functional gear. I have the need to create a functional movement with a very smooth running gear with as less as possible friction.

It looks like you want a pretty simple gear - like four sectors of helical gear stuck together.  You may be able to cut-and-paste something using a 3D modeling program.  (I'm not sure how you plan to manufacture the gear.)  You probably won't get particularly smooth movement during the ratio change.

[JustinO]

It would be a lot of work, but you could edit the print file layers to use slices from gear pairs with shifted tooth phase....


(Edit) Heck, you could stack thin shifted tooth gear pairs on two shafts -- will that print as stuck together gears?

[Nate]

... with shifted tooth phase....

For some reason my brain read that as 'tooth paste' :D

Yeah, a 'stack' is probably the easiest way to do this.