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View Full Version : Image Discuss: 783 Almost done...(1)

CD47-Bot
11-02-2003, 19:38
[cdm-description=photo]14770[/cdm-description]
Clanat
11-02-2003, 19:38
How much of a gear reduction do you have there?
Harrison
11-02-2003, 23:53
I can't recall the exact numbers off the top of my head, but each gearbox has a drill and an atwood in it.

In high gear our final speed is about 10fps.
In low, it's 1.5 fps.

Our wheel diameter is 6". If you want to figure out the exact reduction, feel free :p
LBK Rules
11-02-2003, 23:58
What is the drill motor for?
Gadget470
12-02-2003, 00:04
looks to me that they are matching RPM's then using the drill as a torque booster
sean_killey
12-02-2003, 00:06
its a 2 motor 2 speed transmission... and it is SWEEEEEET!:D ... good ol canadian engineering... which myself, my friend lewis, and our teacher designed.... lets just say in high gear it can pull someone who weighs like 200 lbs... i can only imagine what it can do in low... muahaha
Parks
12-02-2003, 00:15
We are canadian too. Our gear box is different from this one only in that it is more compact.
Great minds think alike.
Andy Baker
12-02-2003, 00:34
Harrison, Sean and the rest of team 783:

Very nice gearbox and drivetrain. This is a robust design which is very well laid out with large bearings. I really like how the drill motor is simply an input device, and if FIRST would change that motor next year, it won't change your design much.

Also, nice use of extrusions to the benefit to get your chain tension to your front and back wheels... the most efficient way to do a 4 wheel drive.

One question: How do you switch gears? Is that device hidden, or just not installed yet?

Andy B.
Harrison
13-02-2003, 20:08
We're using a little pneumatic cylinder on each gearbox to shift.

They are installed and functioning now, but no pics to upload of that just yet. They'll be up soon.

Thanks for the compliments!
Specialagentjim
13-02-2003, 21:54
That drivetrain looks all too familiar, lol.
Robb Gerber
16-02-2003, 16:03
Yes the design may look familiar.

Special thanks goes to Team Epsilon Delta (Team 116) and especially Dave Lavery for their Dual-motor, dual-speed drive transmission design.



Robb Gerber - aka "our Teacher"
Team 783 - Team Advisor
Specialagentjim
16-02-2003, 20:23
Vedy nice
UlTiMaTeP
25-11-2003, 20:28
710 VenomTurbo will keeeeel you!
Gadget470
25-11-2003, 23:26
Let the thread rest in peace...
DaBruteForceGuy
07-12-2003, 18:36
nice tranny... if you guys ever have weight trouble, though, those bearings on the transmission could definitly br less bulky.. i think we use those in our rookie year and they can get weighty and excess.... but nice manufacturing
Melissa Nute
07-12-2003, 23:15
nice tranny... if you guys ever have weight trouble, though, those bearings on the transmission could definitly br less bulky.. i think we use those in our rookie year and they can get weighty and excess.... but nice manufacturingPoints to Gadget's Post...Let this thread die in peace