Version 2.0 of my 6 wheel drive chassis comprised of 1x3x1/8 inch angle aluminum and some flat stock. Including the battery, the whole thing weighs about 65 lbs. The center wheel is about 1/8 inch lower than the omnis to account for tread compression and wear.
I changed the layout of the electronics board, as several people suggested. There is a Jag, a spike, and the power distribution board on the lower level, in addition to extra room for whatever other devices my team might need to add. The battery can easily be moved to the outside edge, depending on how our game piece integrates with the rest of the robot.
In response to the questions several people had about how the angle aluminum would be held together, my team just pop-rivets the corners to hold the frame in the shape we want before having it welded. I could add all of the welding seams/pop-rivets in SolidWorks, but alas, doing either would probably make the model unusable, as it already takes about a minute to open or save.
I also apologize for my lack of response to questions on my previous submission. I did not notice until today that my account activation email was being blocked by gmail’s spam blocker.
if there are omni wheels on the sides, why does the center wheel have to be dropped that much, i would go with 1/6 because the omni wheels will wear about the same.
this one looks much better than your first… i am making a few chassis which i will upload later… who knows, i might see some of these chassis out on the field for next year
If those are andymark wheels you actually have to drop the plaction wheel down 1/8 ish, because even though supposedly the wheels have the same diameter, they really do not.
Sucks if your plactions are not touching the ground.
Are the omnis necessary on this chassis? We have just about the same design with a very small drop in the middle with no omnis at all and it has to be one of the most smooth-driving chassis we have ever had!
I would change from four omni wheels to two omni wheels on the opposite corners with standard drive wheels in the other corners. With just two omni wheels in the oposit corners you will have btter traction and you will be able to turn easy. Or if you are droping the center wheels forget the omnis all together.
Won’t the traction wheels in the opposite corners cause too much friction to turn assuming all wheels are on the same plane? The point of a rocker is to cause a wheel configuration that is shorter than it is wide. With omni’s in opposite corners, you will not have this configuration. This could potentially prevent turning. Prototype it though.
