Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: MaltiK on March 17, 2009, 01:15:25 PM

Title: Do you think this is a good idea? ~Chassis related question
Post by: MaltiK on March 17, 2009, 01:15:25 PM
I made the main chassis partly.
I have not drilled on the caster wheel, because I think I might upgrade after realizing all of the bot's weight will be on the caster.

Anywho, this is the chassis so far:



(http://lh3.ggpht.com/_-2NNkO8FaRc/Sbq4srFe2yI/AAAAAAAAAQY/nGss7hTC2bU/s640/HPIM2566.JPG)



(http://lh5.ggpht.com/_-2NNkO8FaRc/Sbq4tumEfPI/AAAAAAAAAQc/cfAA7eEfU04/s640/HPIM2565.JPG)



(http://lh5.ggpht.com/_-2NNkO8FaRc/Sbq4y43bXyI/AAAAAAAAAQk/hxFDRS518w8/s640/HPIM2562.JPG)



(http://lh3.ggpht.com/_-2NNkO8FaRc/Sbq4wF6wBeI/AAAAAAAAAQg/O8966iEwW5k/s640/HPIM2567.JPG)



Do you think this will support ~ 150lbs? Any suggestions?

A way to lock the rods, instead of tape would be great. I do not have access to many tools, so it will be limited.
Title: Re: Do you think this is a good idea? ~Chassis related question
Post by: ArcMan on March 17, 2009, 01:51:51 PM
I'm not sure how useful that chassis will be.  How about this idea...

Keep your rods between the motors as they are.  Now lay a board flat on top of the rods.  Secure the rods to the board using U-bolts.  Mount your caster to the other end of the board.  This will give you a flat surface to work with - to carry stuff, mount batteries and controllers, etc.
Title: Re: Do you think this is a good idea? ~Chassis related question
Post by: MaltiK on March 17, 2009, 02:10:12 PM
ahhhhhhhhhhhh U bolts!!! +1 for you!!

but the problem is there are not spaced evenly with the horizon, the mounting holes are not level on the motors :/
Title: Re: Do you think this is a good idea? ~Chassis related question
Post by: HDL_CinC_Dragon on March 17, 2009, 02:18:08 PM
Use an open mind and im sure youll figure something out :) Ill help along: You want a level plane between 2 points but said 2 points are not parallel to each other on the correct plane. So youll have to extend one point upward right? Hmm, do we know of any 3 sided shapes that can help with that? :)
Title: Re: Do you think this is a good idea? ~Chassis related question
Post by: MaltiK on March 17, 2009, 03:50:10 PM
Use an open mind and im sure youll figure something out :) Ill help along: You want a level plane between 2 points but said 2 points are not parallel to each other on the correct plane. So youll have to extend one point upward right? Hmm, do we know of any 3 sided shapes that can help with that? :)

Tthe suggestion you made, I presume a triangle with a notch for the rods is impossible for me because as I stated, I have no tools available. So I would prefer to keep it to as little custom-ness as possible?
Title: Re: Do you think this is a good idea? ~Chassis related question
Post by: madchimp on March 17, 2009, 07:10:54 PM
So I would prefer to keep it to as little custom-ness as possible?

You are designing and building your own bot, custom comes with the territory. That being said take a stroll though the hardware section of a home improvement store, I'm sure you can find some brackets or something that can be made to work with very little if any modifications. Just don't limit yourself to the true purpose of things you can always find new creative ways to use things.
Title: Re: Do you think this is a good idea? ~Chassis related question
Post by: ArcMan on March 17, 2009, 08:35:14 PM
ahhhhhhhhhhhh U bolts!!! +1 for you!!

but the problem is there are not spaced evenly with the horizon, the mounting holes are not level on the motors :/

That's OK.  Make your chassis board level with the ground, and angle your motors upwards.  The motors don't need to be mounted horizontally.
Title: Re: Do you think this is a good idea? ~Chassis related question
Post by: Ro-Bot-X on March 18, 2009, 05:51:06 AM
Use an open mind and im sure youll figure something out :) Ill help along: You want a level plane between 2 points but said 2 points are not parallel to each other on the correct plane. So youll have to extend one point upward right? Hmm, do we know of any 3 sided shapes that can help with that? :)

He means use shims to adjust the level difference and use U-bolts to secure everything in place.

But having the rods in the same plane and the motors slanted a bit is a better idea. Now you decide how ever is easier for you.