[drakesword]

Originally Posted by squirrel

I like the idea of using parts you already have. But sometimes the parts are just not right enough for the job.

Agreed just something to get up and running. Modifications could always come at a later time.

Originally Posted by squirrel

A concern for a robot like this is control. I'd try to err on the side of too slow of operating speed, rather than too fast. That means you might have to get creative with transmissions, to get enough reduction. The sand environment is tough on chains and toothed belts. I dont know if the AM planetary gearbox is sealed well enough, but I expect you could add a dust seal over the output shaft if needed.

I think I need to do some research as to how the robots in the middle east fare to the sand and how they do it. Anyone know what iRobot uses for these situations?

Originally Posted by squirrel

We have used V belts for reduction and making a "forgiving" drive system for mechanisms on our FRC robots, you might look into them. Around here it's easy to get large and small pulleys, as they fit the very common evaporative coolers we use in the summer.

Actually v-belts like the ones you describe are also used in HVAC systems and less sophisticated riding lawnmowers.

Originally Posted by squirrel

btw if you look at the garden cart....it could have the wheelbase and track width modified, and you might be able to use the steering system. They turn very sharp.

I actually have one of those carts although its been hrm . . . repurposed as a herbicide sprayer.