pic: 4wd Geared WCD

[Cyberphil]

Originally Posted by msimon785

It's also possible that Inventor is giving you a weight for solid Alu CIMs. Try unenabling any COTS or premade parts, and letting it give you a weight for only the drive base. Then add in everything else. I've found that with that method, Inventor is never more than 1/8th of a lb off, even for our robot this year. Good Luck!

That is a good point. I never thought of that. Is there any way to put in a weight for a certain part without calculating a density that will give you the same weight?

Originally Posted by Jared341

Looks good. Need to put some titanium on there, though

Just to nitpick, most people would call this an 8WD

How are you planning on keeping the gears/wheels on there? You would probably want to extend shaft all the way through the 2x1 tubing in order to provide two points of support.

You are right. It needs more titanium.

And yes, that is my daily, no, hourly mess up. It should be called 8wd.

Snap rings do the trick for us.

If I were to actually create this, I would definitely extend the shafts all the way through the tubing.

Originally Posted by jwfoss

Looks like an interesting concept. A Few Suggestions to look into, many said by other people already:

- move the gears to the inside of the frame
- utilize the reduction provided by using those large gears, this may involve looking into using the standard Andymark shifting gearset with a custom final gear ratio.
- have the electronics/base plate one piece, with cutouts for the trans
- Add Bumper Mounts, check front clearence for bumpers, it looks like the wheels are infront of the chassis' leading edge.
- consider alternate wheel sizes and types, there are many options out there (I'm currently in the colsons are great line of thought)

Keep up the good work!

With the gears on the inside of the frame, how would I be able to mount the transmission? The gears would prevent any mounting unless I was to create a custom mounting setup which would add more weight and pain. Plus, the gears would be mounted to the wheels in the way it is right now. If I were to bring the gears inside of the frame I would need a collar for the gears to keep them in line and connected to the shaft. I just thought thought of this too: With the gears on the inside, the base-plate could only be mounted on the front and back of the bot. There are other problems with that idea also.

This is a point I wanted to do, but I am very unsure as to how to go about that. As you can tell, I am not great at Inventor, so creating a custom gearbox that will perfectly line up with the gears on the wheels is a few steps above my head. Maybe in the coming years.

Believe it or not, they are one piece (they continue together on the frame). Once again, if I were to make this, I would just make the base-plate a cutout where the transmissions stick out.

The wheels are in fact past the frame. I did this with respect to 2010's game, so I was going for ease of getting over the bump, even though they could be flush and still contact the bump before the frame. Once again, my beginner showing (this was from a while ago actually, January 4th to be exact).

Check out some of my new stuff. I would love your input!:

WCD Cheesy Poof Inspired with a twist