07-07-2006 23:32

Jonathan Norris

Re: pic: Crabstyle v2

Wow that looks really solid, maybe a bit too solid . How beefy is it? looks like you wouldn't have much weight to work with after the solid bottom frame.

07-07-2006 23:59

Joe_Widen

Re: pic: Crabstyle v2

Surprisingly, the whole frame and crab modules weigh 40 pounds.

08-07-2006 00:00

sanddrag

Re: pic: Crabstyle v2

My goodness, wow, geez, um, hrrm. Wow. That's got to be a welder's worst nightmare.

Is there going to be anything on top of it? Is FIRST raising the weight limit? I think you've definitely got the best of the best in terms of strength but the weight on that has got to be quite high. Perhaps tone it down a bit. More is not always merrier in this scenario.

EDIT: Saw the above post. Only 40 lbs? Are you sure material properties are set correctly? Well, on second thought, the wall thickness is only 2mm. Just seems a but too complicated to me though

Nice work on the model though. It is clear that must have taken some considerable time.

08-07-2006 00:18

=Martin=Taylor=

Re: pic: Crabstyle v2

Looks like someones having fun with the frame generator!

08-07-2006 01:11

Arefin Bari

Re: pic: Crabstyle v2

How much would it weigh including the transmissions you are planning on using, chain, motors?

08-07-2006 01:15

Joe_Widen

Re: pic: Crabstyle v2

About the welding, I'm thinking of going to item....then I'll of course tone it down. Unless we get some super crazy good welder, item is my best friend.

Yes, I was having fun in frame generator. I think that 1/3 of your weight should go to chassis and drivetrain anyways.

08-07-2006 01:31

Jonathan Norris

Re: pic: Crabstyle v2

it doesn't look like that 40 pounds includes motors, electronics, and all the wonderful small things that tend to be overlooked in CAD designs. Their is definitely more aluminum than their needs to be, your wheel modules are really nice, but the rest of the frame is a little excessive, like compare that to the stock frame. You could probably do without many of the cross supports, and even pushing the wheel modules out to the exterior of the frame would cut a lot of aluminum. Very nice CAD though.

08-07-2006 01:52

DB_UPS

Re: pic: Crabstyle v2

I wouldn't do item. Item drivers me crazy cause i can't weld it together.

08-07-2006 03:43

=Martin=Taylor=

Re: pic: Crabstyle v2

What motors will you be using to turn the modules?

I've heard some good and bad stuff about using the globe.

08-07-2006 12:10

Joe_Widen

Re: pic: Crabstyle v2

Thanks for all the feedback everyone.

I'm thinking the globes or windows, not sure yet.

Well everything in that picture minus the cims weight 40 pounds. So I guess I better cut out some frame so I have more weight to play with. I'll try to get the other stuff in there in my next version.

Well I think it would weigh somewheres around 75 pounds with the turning modules and electrictronics.

08-07-2006 13:23

Re: pic: Crabstyle v2

I like the solid design, except for the weight factor. Have you included chains, steering motors, bolts, and sensors into that weight?

As well as that, have you included the factor of mounting sensors? ie. Pot for turning, optical for speed, and so on... You really do need those for a crab drive, as we discovered when we made one for triple play.

08-07-2006 14:49

Joe_Widen

Re: pic: Crabstyle v2

So i redesigned the Frame and saved four pounds. I guess I'm going with the window motors for the steering and the plastic chain hammond used for streering their crab drives. I'm guessing the streering mechanism will be abouth 5 pounds. Dont know until I make it, but thats my guess right now. I've already got spots for sensors, and lots of them. Otherwise, I've accounted for everything.

P.S. Im working on an electronics board.