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Step 3Make the Chassis
Next make the chassis. You can make it out of one piec of Aluminum if you prefer or bolt together 3/4" flat stock. The important thing to remember is to keep all servo splines, bearings, motor shaft in the same plane. Other than that everything can fudge a little.
Take a look at all the pics and you'll get a good idea of what you need to do.
Attach another one of the aluminum hubs to the gear motor drive shaft. Screw some bolts into it and sand them down so they fit nicely in the hub that you just mounted to the ball.
Take a look at all the pics and you'll get a good idea of what you need to do.
Attach another one of the aluminum hubs to the gear motor drive shaft. Screw some bolts into it and sand them down so they fit nicely in the hub that you just mounted to the ball.
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The technician at my university made one a while back using the same arrangement. The drive motors where servo.
it his here
http://www.gel.usherbrooke.ca/laborius/projects/Roball/index.html
They have a patent on it
http://www.patentstorm.us/patents/6227933.html
The only draw back of your system ( if you want to make it perfect ) is to have mechanical isolation between the drive motor and the sphear. Same thing with the steering arm. You could call it a clutch like those found in toys motors. It prevents of damaging the motors gears. I think with you metal gears, that would be good enough.
The videos are great!
Keep it up
Jerome