pic: Madtown Robotics Future Frame Proto 1

[=Martin=Taylor=]

Originally Posted by rc_cola1323

i got the drawing for the cims and the gearbox from a team at a regional, it is a dewalt setup.

I'm almost certian those aren't CIMs you're using. Try downloading the CIMs from the FIRST CAD Library and seeing how they compare...

Originally Posted by artdutra04

This would be harder, better, faster, stronger...

I see you have learned much from Daft Punk

[R.C.]

If you're sure i'll do it, do you know of anywhere to get the dewalt gearboxes and the cims and 4 inch double set omni's. That would help me out a lot.

Thanks,
rc

[Madison]

A handful of things:

• The motor, transmission and mount models are from http://www.teamdelta.com/products/prod5.htm
  
  It is not a CIM and it is a different model Dewalt gearbox than the NBD whitepaper calls for, as I recall. I can't say if it'd accept similar modifications and work the same way.
  
• There's no way that tubing deflected several inches under that load. It would surely deform or fail before achieving that sort of deflection.
  
• I designed 4" omniwheels for our 2008 robot that used a combination of custom components and AndyMark products. I'll see what I can do about making drawings of the individual parts. It might be a fun exercise to learn to model things from drawings instead of just expecting that someone will give you a completed model.

[R.C.]

Your right, that is a delta gearbox. I thought it was a dewalt with a cim and custom mount.

Solidworks showed an animation with several inches of deflection

I don't have time to draw 4 inch omni's because currently i am the only one that can use solidworks. I have b-ball practice and currently under an internship in which i draw and create signs.

[Madison]

Originally Posted by rc_cola1323

Your right, that is a delta gearbox. I thought it was a dewalt with a cim and custom mount.

Solidworks showed an animation with several inches of deflection

I don't have time to draw 4 inch omni's because currently i am the only one that can use solidworks. I have b-ball practice and currently under an internship in which i draw and create signs.

Any FEA visualization software in a CAD package will enormously exaggerate the deflection. Use the colors and scale in the corner of the screen to determine actual deflection; don't eyeball it.

I work full-time with Solidworks and mentor a team, am moving and am tired, so if you're too busy to model the parts, I'm probably too busy to make the drawings.

[R.C.]

I am sorry you do that for a living, most people are nice enough to share cad drawings. I know i have. I will use the scale for an exact reading. I posted this frame just to get some suggestions and ways to improve. Thanks for views.

-rc

[Madison]

Originally Posted by rc_cola1323

I am sorry you do that for a living, most people are nice enough to share cad drawings. I know i have. I will use the scale for an exact reading. I posted this frame just to get some suggestions and ways to improve. Thanks for views.

-rc

Forgive me if I misconstrued my meaning. I offered to provide drawings to you of our omniwheels for your reference, but you've indicated that you're too busy to bother rebuilding models from those drawings. If you're too busy to make use of what I offered, then I won't take time from my own busy schedule to make them available.

I offered help and you turned it down. No harm, no foul, as they say, but I'm a bit dumbfounded that, not only was it unappreciated, but that you're saying I'm not nice because I didn't offer more.

[R.C.]

My bad, i thought you were telling me make my own with no reference. Sorry, i totally misunderstood. If you could send me those drawings i would greatly appreciate them. rcthekid1323@gmail.com.

[Madison]

Originally Posted by rc_cola1323

My bad, i thought you were telling me make my own with no reference. Sorry, i totally misunderstood. If you could send me those drawings i would greatly appreciate them. rcthekid1323@gmail.com.

No worries.

I don't have the models at work; I will finish the drawings up when I get home tonight and will upload them to CD.

[R.C.]

Thanks for help, really appreciated