Screw drive garden tractor

[Rednic79]

yes!! your are absolutely right! that's where it went wrong! awesome! that was buggin me a bunch

Nice job!

A thought on the calculation for the ring... I think you would want to use the circumference of the tube as a starting point. Then add the spacing that you want, which gives you your new circumference. That would come out to about 11.3" I.d.

I'm not sure if that's right either, but it's the formula I came up with a couple days ago when I was thinking about this.

 

[Rednic79]

OK, gotcha. So, another question - could you weld the rings together first, or would it just take way too much to stretch it all apart in one piece?

yeah, that was one way I was considering....I would have to stretch them off the pod somehow first then slide them on I think...maybe pull them with a winch of something

 

[CNC Dan]

well I started on the screws, what a nightmare...check it out

http://youtu.be/0E7m3U3kuy0

You are using 2D math to solve a 3D problem.

figure circumference as the base of a right triangle and the pitch as the height of the triangle. the resulting hypotenuse will be the inside circumference of your flighting. divide that by PI to get your diameter.
since you already have your tubes already made, just wrap a string around it and then measure the length of the string and divide by PI.

As you may know, there are places that will make flighting to fit your tubes.

 

[GolfAddict]

But at this point, isn't he going to want to make the other side identical?

 

[CNC Dan]

Someone beat me to it.

Anyway, I think you will need to add another flight in between the one you have.

I think welding all the rings first would be the best way to do it. Use a winch to pull the end.

 

[CNC Dan]

But at this point, isn't he going to want to make the other side identical?

Yup. Unless he uses some kind of independent variable speed drive the machine is always going to try to turn one way or the other.

 

[Rednic79]

yeah, at this point i'm going to do the same on the other side...I totally understand what I did wrong, but it's too late now. as long as I space the next auger out the same at 9" it should be ok. it worked before, it will work again. a second flight is a possibility for sure

 

[mikehaugen]

yeah, at this point i'm going to do the same on the other side...I totally understand what I did wrong, but it's too late now. as long as I space the next auger out the same at 9" it should be ok. it worked before, it will work again. a second flight is a possibility for sure

A second flight may be a good idea, at the very least it will give you more ground contact on harder surfaces.... but how do you put it on now? :laughing:

 

[mikehaugen]

You are using 2D math to solve a 3D problem.

figure circumference as the base of a right triangle and the pitch as the height of the triangle. the resulting hypotenuse will be the inside circumference of your flighting. divide that by PI to get your diameter.
since you already have your tubes already made, just wrap a string around it and then measure the length of the string and divide by PI.

As you may know, there are places that will make flighting to fit your tubes.

I was thinking that too at first, but my math shows 9.1 as the I.d. which seems small, so I figured it was wrong.

 

[Rednic79]

it would be very expensive in beer purchases.....

A second flight may be a good idea, at the very least it will give you more ground contact on harder surfaces.... but how do you put it on now? :laughing: