pic: what is cooking
 

Re: pic: what is cooking
 

Well that's one heck of a reduction (in a fairly lightweight package too). But why the (what appears to be) 1:1 gearing on the last stage? Also, you should render that thing in Inventor Studio if you have it. It will look nice.

Also, nice job filleting all your corners. However, your machinist won't be thrilled with that really pointy triangle. What do you need to get in there, like an 1/8" or 3/16" tool?

Re: pic: what is cooking
 

hmm...how to turn your CIM into a Taigene 101? looks nice.

Re: pic: what is cooking
 

thank you very much for pointing that out i must have missded it

Re: pic: what is cooking
 

...That's a lot of reduction. I also like the lightening method. However, as Sanddrag mentioned, you may want to make your corner filets a little larger, just to be friendly to the machinist.

Re: pic: what is cooking
 

I really like how well you've done the "spokes" out from the bearing locations. It looks just great. :)

Re: pic: what is cooking
 

Are you sure those spokes can take the torque of the final output, I'm no ME, but they look a little small to me. The big gears look about the same size throughout the gearbox, as do the little ones. So, lets say the little one looks about 12-15 tooth and the big ones look about 60. There look to be about 5 reductions, so I'm thinking a final output of 1.7-5.2 rpms. So, either turning swerve modules (seems a bit excessive) or some sort of arm? I might be a bit off on the tooth counts (hopefully not too far) but whatever the exact number is, that is one heck of a reduction.

Re: pic: what is cooking
 

Judging by Luke's calc of final output RPM which sounds about right....im guessing a telescoping arm mechanism or other arm mechanism...looks very cool tho

Re: pic: what is cooking
 

Lukevanoort you were close the large gear is 70 teeth and the small gear is 12 teeth the final out put is 2.2 RPM :D

Re: pic: what is cooking
 

you got it it is for a telescoping arm designed by a 8th grader :ahh:

Re: pic: what is cooking
 

I agree with the torque concerns...

But how can you test something like that...the only thing I know of is COSMOS and that is only for solidworks.

I really like the wight reduction designs though and if there are no torque problems that is an amazing gearbox.

Re: pic: what is cooking
 

Where are you counting a fifth reduction I count four... I had someone else look and they also only see four.

Re: pic: what is cooking
 

There is stress testing in Inventor 11 and I believe in 10 also, but you've got to know how to use it. Testing for loads is the easy part. Predicting them is not.

Re: pic: what is cooking
 

Why not spare your machinist a tremendous amount of trouble and cut all those holes yourself with a hand drill? :cool:

Round holes will be faster to cut and stronger to boot. True, you will probably want your machinist to machine down the gears since they require balance; but the frame?

--------------------------------------------------------------------------

What do you plan on doing with your telescoping arm anyways? Any cool off-season projects a-brewing?

Nice work.

Re: pic: what is cooking
 

no it is just to have if next year we need it