Quote:
Originally Posted by indieFan
How did you drill the holes? A drill press does not have the same ability to drill straight like a mill. I would suggest drilling the first wall, then use a transfer punch to get the second wall in the same location. For anything over 1/4" diameter, start with the hole in the first wall being the largest size transfer punch available, transfer it, then drill the larger hole.
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Quote:
Originally Posted by Mike Marandola
Might be a dumb question, but are there bearings in BOTH faces of the box tubing? How much space is between the outside of the the box tubing and the wheel?
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Sorry a correction to my original post, we used pillow blocks mounted to the underside of 1x3 tubing instead of running the shaft through the tube.
http://www.mcmaster.com/#5913k61/=1285fnp
Looking from an aerial perspective, going from the outer side of the robot inward, this was our setup:
shaft collar, flange bearing in a 1/8"side plate, two 1/8" thrust washers, 8"pneumatic wheel bolted to a keyhub, a sprocket for 25 chain, two thrust washers, pillow block, shaft collar (for spacing), a sprocket for 35 chain, shaft collar.
This sums up to around 3.25" between the pillow block and sideplate, and 1.5" from the pillow block to the tip of the shaft on the inside. I'll try and take a picture tomorrow.
Thinking about it more, i think the pillow block may have been the source of our problems, since it allowed the shaft to pivot, instead of binding in place had we simply gone straight through the tube (with bearings XD).