Chief Delphi - pic: New gearbox CAD

Page 2 of 3

Show 100 post(s) from this thread on one page

Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- Extra Discussion (http://www.chiefdelphi.com/forums/forumdisplay.php?f=68)

- - pic: New gearbox CAD (http://www.chiefdelphi.com/forums/showthread.php?t=67602)

CraigHickman

11-05-2008 23:08

Re: pic: New gearbox CAD

Quote:

Originally Posted by sanddrag (Post 747409)

I'd bet you could get another pound out of it in those gears if you wanted to, but overall, nice work.

No, actually. The gears are heavily "dished" out on the other side, in order to keep those components to a single lathe process. There's practically no weight I can save by removing materials, only adding material.

Quote:

Originally Posted by Hachiban VIII (Post 747423)

What is the advantage over the toughbox?

I like the CIM mounts. That's a very compact way to do it.

The advantage it has over the toughbox is custom ratio, massively lighter, more stylish, more precise, and better bragging rights.

Quote:

Originally Posted by AdamHeard (Post 747426)

I guess It would be the weight savings.

I'm not really a fan of the same 4 bolts holding the gearbox together, the motors on and the gearbox to whatever structure it is mounted to. No matter what, that is going to make assembly and mounting a much bigger pain that it needs to be. I'll agree it cuts down on parts and weight, but I don't think it's worth it.

It would be a bit of a pain to assemble. However, depending on what kind of drive system that it would mate to, two of the mounting bolts may be countersunk. That would aid a bit in assembly.

M. Mellott

12-05-2008 02:11

Re: pic: New gearbox CAD

A straight-forward single-speed gearbox--simple in its mechanical design, but the weight savings and sideplate design make it very elegant...something defintely to brag about if this is on your robot!

And yes, "elegant" can be used to describe a gearbox...ask the Germans!!

Triple B

12-05-2008 06:56

Re: pic: New gearbox CAD

Craig,
I like it.
mike d

Nica F.

12-05-2008 11:39

Re: pic: New gearbox CAD

Quote:

Originally Posted by AdamHeard (Post 747426)

that is going to make assembly and mounting a much bigger pain that it needs to be. I'll agree it cuts down on parts and weight, but I don't think it's worth it.

It does look like much more of a hassle to mount, but thinking of the end product with those gearboxes mounted nicely would make it worth it. Pain for Beauty. :P

Quote:

Originally Posted by CraigHickman

two of the mounting bolts may be countersunk. That would aid a bit in assembly.

Countersinking would aid in assembly but it still would be more complicated to assemble than needed. Very interesting design though, kudos.

Kyle Love

12-05-2008 11:44

Re: pic: New gearbox CAD

Quote:

Originally Posted by Hachiban VIII (Post 747423)

What is the advantage over the toughbox?

I like the CIM mounts. That's a very compact way to do it.

The weight savings and more custom ratios.

A big difference is one is made for mass production and one is made to build a few of. The cost to mass produce something like this would be quite a bit greater then the price of the Toughbox (e.g. more machining).

Joe Ross

12-05-2008 12:09

Re: pic: New gearbox CAD

What did you use for the weight of the motors (ie what is the real weight of the gearbox).

Woody1458

12-05-2008 14:24

Re: pic: New gearbox CAD

while you are making your own gearbox you could take a hint from 968/254 and add a FP motor :).

AdamHeard

12-05-2008 14:50

Re: pic: New gearbox CAD

Quote:

Originally Posted by Woody1458 (Post 747582)

while you are making your own gearbox you could take a hint from 968/254 and add a FP motor :).

And then take another hint from 968/254 and take them out after the first regional ;).

~~They didn't even notice they were gone~~ (I misheard something a while back, they noticed [like Cory says below]), and with the Big CIMs out of the kop, the FPs are better suited for a mechanism than added power in the drive (for most games)

Cory	12-05-2008 16:39

Re: pic: New gearbox CAD

Quote:

Originally Posted by AdamHeard (Post 747587)

And then take another hint from 968/254 and take them out after the first regional ;).

They didn't even notice they were gone, and with the Big CIMs out of the kop, the FPs are better suited for a mechanism than added power in the drive (for most games)

I wouldn't say that's entirely accurate--we were definitely noticeably less speedy. it took a bit longer to accelerate to top speed.

The benefit we got out of putting the FP's elsewhere more than made up for the slightly slower acceleration.

=Martin=Taylor=

12-05-2008 18:16

Re: pic: New gearbox CAD

Quote:

Originally Posted by Joe Ross (Post 747548)

What did you use for the weight of the motors (ie what is the real weight of the gearbox).

How much do the CIMs weigh anyways? I've always wanted to know that :o

According to the AM website the toughboxes weigh 2.5 lbs. without motors. The only reason they weigh more than the Craig's is b/c they don't have any lightening patters on the gears (which as Kyle pointed out would make them more expensive).

Cory	12-05-2008 18:18

Re: pic: New gearbox CAD

Quote:

Originally Posted by Hachiban VIII (Post 747652)

How much do the CIMs weigh anyways? I've always wanted to know that :o

2.75 lbs

=Martin=Taylor=

12-05-2008 18:25

Re: pic: New gearbox CAD

Quote:

Originally Posted by Cory (Post 747655)

2.75 lbs

Really?

So the gearbox weighs 1.6 oz.!!!?? Screw the toughboxes :D I know what I'm using next year :D

Cory	12-05-2008 18:37

Re: pic: New gearbox CAD

Quote:

Originally Posted by Hachiban VIII (Post 747656)

Really?

So the gearbox weighs 1.6 oz.!!!?? Screw the toughboxes :D I know what I'm using next year :D

Just weighed one a little while ago to check and see.

David Guzman

12-05-2008 19:18

Re: pic: New gearbox CAD

Yeap.

I always set up my CIMs to be 2.8 lbs (each) in Inventor. He must be using the default material on inventor.

Looks good, I would also like to know how much it weights with out the motors.

israel354

12-05-2008 19:54

Re: pic: New gearbox CAD

dude thats freaking sweet!

All times are GMT -5. The time now is 13:54.

Page 2 of 3

Show 100 post(s) from this thread on one page