Hint #1 for Ken Leung

[Shawn60]

Our estimated finished weight will be between 110lbs to 115 lbs.

Check back in two days for hint #2

Shawn
Team 60

[Ken Leung]

Wow, that's 15lbs less than what I expected.... Interesting....

I can't wait to see the whole robot! If you can, please post in the same thread.

[Shawn60]

No problem. You will need to go the gallery for some of the other clues.

[Shawn60]

Ken

Go to the gallery and you can see a couple of pictures of our gear box in a semi complete form. What do you think?

http://www.chiefdelphi.com/forums/pi...DESC&sort=date

Shawn
60

ps In a couple of days I will post a completed gear box.

[Ken Leung]

So far, pretty good . One semi complete transmission done on the 19th. Not bad at all. Just need at most 1 more week to finish this one.

Let's see, I like the shape, it save lots of weight by cutting away the corners... Ah, 2 place for motors to screw in, so its a transmission for two motors... Probably just one side of the robot, so your robot will have 4 motors for the drive system huh?

On to the next picture... The sprocket on the most right is the last stage of the gear box, connecting to a shaft transmitting power to the wheels. The middle 2 gear is the 2 speed sprocket, each level representing one individual gear ratio....

The shaft next to it is where the magic happen. By sliding that shaft with 3 gears on it, you engage one set of gear at a time. The middle gear with the top gear on the right, or the bottom gear with the bottom gear on the right. On the other end of this shaft is where the motors get connected to.

The shaft slightly behind all three of the others is where the 2nd motor connect to. It connect with the left most shaft on the top gear, and transmit power from the second motor to that shaft by meshing the teeth on the top gear. Not sure if you want to, but I bet it can leave that shaft alone by using the pneumatics to slide it off the top gear and clear the rest of the transmission.

Pretty nice gear box this year . Just make sure its completed.

[Dima]

Hmmm it looks as if there are 2 pneumatic actuators on the gearbox? NO?

the only 2 reasons in think there are 2 pneumatic actuators in the picture are A) the second pneumatic actuator is just being held up by there for reasons of not wanting to pu it down? B) the gearbox utilizez 2 actuator in which case i would assume its a 3 speed robot? NO?

[Ken Leung]

Originally posted by Dima
Hmmm it looks as if there are 2 pneumatic actuators on the gearbox? NO?

the only 2 reasons in think there are 2 pneumatic actuators in the picture are A) the second pneumatic actuator is just being held up by there for reasons of not wanting to pu it down? B) the gearbox utilizez 2 actuator in which case i would assume its a 3 speed robot? NO?

Nope... the reason for the 2nd pneumatics is to make sure the 2nd motor stay engaged to the first shaft. The 1st pneumatic cylinder is to shift from one gear ratio to another.

[George]

Ken, Close, but not as good as last year .......
more pics to come,
Are you going to Phoenix or LA ?
Hint: 1 drive box, three boxes total.
A=bc/2
Have FUN!!!
Geo.

[Ken Leung]

Not sure I will go to those regionals, but I will definitely make it to the Championship event. Show me the robot then.

And hey, I only got 2 pictures to work with, Give me some credit . Its looking good by the way.

[George]

You get LOTS of credit Ken, your just traped in old thinking!
you got rotten pics and got a lot of it right....
But some of it wrong too
we should be finished Friday (gear boxes are finished) and to powder-coat next week
Looking forward to TX see ya there (or sooner?)
I am missing san jose all ready
Geo.

[Madison]

Now...here's the thing...

If the photo shows two pneumatic pistons, they'd be allowed only a single other custom cylinder. Those are each small bore, small stroke pistons, and thus, a custom order.

As per the rules, they wouldn't be able to order the two additional pistons necessary to make a second transmission for the other side of their robot.

So, based on that, and that each plate of the gearbox is alike, I'll guess that the motors (four, probably) all attach to a single gearbox.

This, of course, requires that their robot be only 2WD, or that it be 4WD with a differential. I'd imagine it's the latter.

[Shawn60]

Ken...

I am going to put up the finished gear box tonight. Can you make a repeat and not only explain the gearbox but also come up with a possible strategy of our robot?

Good Luck

Shawn

[Patrick Wang]

Hey George!

Can't wait to see your robot, we won't see you guys up north this year but we'll visit at Nationals.

That powdercoat is a trademark now

[DanLevin247]

I wish 247 could be underweight, but...with 2.1 pound wheels ( i'm not saying how many ) before "speed holes"....we are going to be right at that weight limit

[Shawn60]

Here is the final gear box.

Good Luck Ken

Shawn

http://www.chiefdelphi.com/forums/pi...DESC&sort=date