Difference between revisions of "Talk:DEWBOT VII Finger Lakes Regional"

Revision as of 18:27, 7 March 2011

What Worked

• Teleop scoring was okay. We could score 3 logo pieces fairly reliably. 4 max. Practice should improve this further. We believe a roller claw would also speed up scoring.

What Didn't

• Minibot - general bumping around and vibrations during match caused the spreader to come out and motors turn on (and burn out).
• Minibot - easily damaged
• Autonomous - we scored once in autonomous (match 2). All other times we failed. Many times veering off the line near the wall and hanging the ubertube on top of the next scoring grid post (not on the horizontal pipe, but the vertical). We tried straight-line autonomous only (due to extending screws in low wall).
• Pivot drive repeatedly jammed (drive jam, not steering). Problem appears to originate with the wheel axle collar, some of which cannot be tightened securely. When the collar moves, the wheel shifts on the axle. The wheel shift causes the chain to jam on the 9T sprocket, which is not chamfered. Sometimes the jam is momentary. Sometimes not. One such jam led us to change a pivot on Thursday. Since the jam stalls a CIM motor, these jams run down our batteries extremely quickly.
• Belt driven arm. The belt shredded during the quarterfinals. We replaced the belt and it shredded again in the first semifinal match. We need a better mechanism.
• IR sensors were apparently not working throughout the qualifying matches. This appears to have been a cRIO problem. They seem to work now.
• IR sensor - one was shorted to the frame, complicating inspection. These need to be insulated before mounting on metal.
• Video feed from the camera.

What Broke

• Minibot
• Pivots - see jams above
• Arm drive - shredded two belts

What Next?

An Action Plan in preparation for Philadelphia is proposed, together with a new Minibot Specifications.