12-07-2016 19:41

Chak

Re: pic: Everything in the tube drive (too late to turn back now)

Looking at the wheel set-up, are you planning on making bumper mounts that will make a hexagonal drivetrain?

What's that bump in the middle where the gearbox is? What's holding the bearings near the shifter in? It doesn't have a flange, so it confuses me.

Assemby could be easier with some extra access holes to stick a pair of pliers in to hold stuff still.

12-07-2016 19:51

asid61

Re: pic: Everything in the tube drive (too late to turn back now)

I like your packaging much more than mine, but I can see why it would be impossible to assemble...
I'm seconding Chak's question about what the bump is. Did you mill down the entire outside of the tube except for that part?

EDIT: what size tubes are those?

12-07-2016 20:52

Lil' Lavery

Re: pic: Everything in the tube drive (too late to turn back now)

When you expand the drive rails to 2"x2" (which is my educated guess as those rail dimensions), how much space are you actually saving by going in tube?

12-07-2016 21:23

Cothron Theiss

Re: pic: Everything in the tube drive (too late to turn back now)

Any reason you put the outer wheels on the inner edge of the tube and not the outside? Having them on the outside reduces turning scrub (slightly) and lets you extend your belly pan into the corners of the frame.

Though, having a hexagonal frame perimeter might make it easier to avoid pins.

13-07-2016 00:06

GeeTwo

Re: pic: Everything in the tube drive (too late to turn back now)

Quote:

Originally Posted by Chak What's that bump in the middle where the gearbox is?

13-07-2016 01:04

Bryce2471

Re: pic: Everything in the tube drive (too late to turn back now)

My apologies for the slow response. I just got off work.

Quote:

Originally Posted by Chak Looking at the wheel set-up, are you planning on making bumper mounts that will make a hexagonal drivetrain?

Quote:

What's holding the bearings near the shifter in? It doesn't have a flange, so it confuses me.

Quote:

Originally Posted by asid61 I like your packaging much more than mine, but I can see why it would be impossible to assemble... I'm seconding Chak's question about what the bump is. Did you mill down the entire outside of the tube except for that part?

Quote:

Originally Posted by Lil' Lavery When you expand the drive rails to 2"x2" (which is my educated guess as those rail dimensions), how much space are you actually saving by going in tube?

Quote:

Originally Posted by Cothron Theiss Any reason you put the outer wheels on the inner edge of the tube and not the outside? Having them on the outside reduces turning scrub (slightly) and lets you extend your belly pan into the corners of the frame. Though, having a hexagonal frame perimeter might make it easier to avoid pins.

13-07-2016 03:34

42!

Re: pic: Everything in the tube drive (too late to turn back now)

Quote:

Originally Posted by Bryce2471 Thanks, and yes I prefer that to a lightening pattern.

13-07-2016 15:10

Chris is me

Re: pic: Everything in the tube drive (too late to turn back now)

Could I get a picture of your shifter shaft without any gears on it? Kind of curious how that works out, with the pulleys on either end and the shifter in the middle.

13-07-2016 18:24

Bryce2471

Re: pic: Everything in the tube drive (too late to turn back now)

Quote:

Originally Posted by 42! Have you ever used this technique in real life? Even if you have a facing cutter and a good size mill it would take a huge amount of time and resources. The same result could be achieved by bolting/riveting/epoxying/welding a reinforcement plate in the areas you need on some thinner wall tubing. In general when working with square tubing it's a better use of resources to order a smaller size/wall thickness than to machine weight away from a thicker tube.

Quote:

Originally Posted by Chris is me Could I get a picture of your shifter shaft without any gears on it? Kind of curious how that works out, with the pulleys on either end and the shifter in the middle.

13-07-2016 19:27

chrisfl

Re: pic: Everything in the tube drive (too late to turn back now)

Would you be able to put your front and back wheels inside the rails as well? That would utilize more space in them and maybe make the concept more valuable with as much space as possible being utilized

13-07-2016 21:12

Bryce2471

Re: pic: Everything in the tube drive (too late to turn back now)

Quote:

Originally Posted by chrisfl Would you be able to put your front and back wheels inside the rails as well? That would utilize more space in them and maybe make the concept more valuable with as much space as possible being utilized

13-07-2016 23:21

PAR_WIG1350

Re: pic: Everything in the tube drive (too late to turn back now)

Quote:

Originally Posted by Bryce2471 Great idea! I'm surprised I hadn't thought of that. I still don't think the design would have enough value to be worth pursuing, but putting the wheels in there definitely saves some space. Here's the updated model:Picture

1.25*sin(x)=1
sin(x)=0.8
x=arcsin(0.8)
L=1-1.25cos(x)    //maximum length of remaining material (in inches), measured from
L=0.25            //edge of tube, assuming motor is centered

15-07-2016 11:53

chrisfl

Re: pic: Everything in the tube drive (too late to turn back now)

Quote:

Originally Posted by PAR_WIG1350 Now, what would it take to get the motors inside the tube? They are fairly high on the list of components that get in the way, so that should be a priority. (2.5" motors fit in 2" tubes, right?) Code: 1.25*sin(x)=1 sin(x)=0.8 x=arcsin(0.8) L=1-1.25cos(x) //maximum length of remaining material (in inches), measured from L=0.25 //edge of tube, assuming motor is centered (Yes, they technically do.)

15-07-2016 22:10

PAR_WIG1350

Re: pic: Everything in the tube drive (too late to turn back now)

Quote:

Originally Posted by chrisfl If you are really ambitious, I bet a few talons could fit in there too! Maybe an accumulator even.

18-07-2016 16:17

chrisfl

Re: pic: Everything in the tube drive (too late to turn back now)

Quote:

Originally Posted by PAR_WIG1350 While there are some that would fit, I think it would be more practical to keep the accumulators elsewhere. /S On a slightly more serious note, there is still unused space in the front and back rails for possible manipulator or slide drive mechanisms.