As a shoestring budget rural team, we are desperate to fix a motor mount durability problem that popped up this weekend at Seattle before our first (hard-earned) nationals next week.
It didn’t come to light until 1/2 way thru our qualifying rounds this weekend that we need to modify our plastic 2-speed drill motor/trany mounts with servo shifting to metal. The kit supplied plastic mount system we’ve been using worked great to a point and has failed since. We bolted servos over the drill speed shifter to the plastic mounting brackets for a system not unlike the one published in the White Papers last year by team 45 for the 2-speed drill motor assembly (except ours is obviously too flimsy).
Our robot could be a top competitor if we can fix this mounting problem, but we only have til midnight Weds. per update#20.
Anyone willing to share a tooling plan for a decent 2-speed drill motor mount for THIS year’s drill motors would be deified in our small farming community. We would outsource to a machine shop to tool us a better mounts (we have no shop) but realize we don’t have time to design & testing.
Any guidance is appreciated, as always.
Thanks! J#
We will also partially compensate helping teams with feta or chevre goat cheese. J#
Team 222 Tigertrons I remember had aluminum mounts.
we use aluminum mounts. Unfortunately, I don’t know enough about their actually fabrication to be able to help you out much. While I’m sure they would help you out, the one thing I do know is that at this point you don’t have nearly enough time to do something like this. My best suggestion would simply be to bring spares of the system you do have.
If worst comes to absolute worst you can use hose clamps. They have worked in the past.
Jeff,
Are you not able to order from http://www2.usfirst.org/2003comp/MMHorderform.pdf. Next day air is available but I would ship directly to your hotel in Houston. I am checking to see if we still have ours, I am not sure if we still have them since we built custom transmissions this year.
Additionally, I don’t think these transmissions are meant to shift while under load. If that is what you are attempting it is possibly the reason you tore out the mounts. In between low and high the trans is in neutral and the motor is likely revving high with no load. Also, have you removed the shaft locking devices? These play havoc with the drive train when no motor drive is occurring but the robot is still moving. Glad to see you are getting a chance to come to Houston. Good luck!
*Originally posted by Al Skierkiewicz *
**Jeff,
Are you not able to order from http://www2.usfirst.org/2003comp/MMHorderform.pdf. Next day air is available but I would ship directly to your hotel in Houston. **
FIRST said in an update that all MMH ordering was over and the remaining parts were packed for the road.