Re: pic: 1726 NURC robot prototype
 

We got some 3200mh batteries lipo from tower hobbies
http://www3.towerhobbies.com/cgi-bin...&I=LXMDN3&P=ML
the link is not the right battery but it is the same brand

The three blade reverse pitch, pusher prop
http://www3.towerhobbies.com/cgi-bin...?&I=LXAPX4&P=7
and then we cut it to 4inch diam. to fit in abs coupler

Re: pic: 1726 NURC robot prototype
 

Hey do you know where to get a rack and pinion set. We are needing a way to extend our arm in and out, screw drive is just not cutting it. We prefer plastic, but small brass will work as well.

Re: pic: 1726 NURC robot prototype
 

Stock Drive Parts/Sterling Instruments is a good place. They're reasonably priced and have a big selection to chose from. Just be careful, we've gotten some bad stuff from them before.

Re: pic: 1726 NURC robot prototype
 

Thanks Jon.

Re: pic: 1726 NURC robot prototype
 

I wonder if you could use the vex rack and pinion parts? you'd have to make a support thingy for it, and the stuff that it's made to bolt to is all steel (or aluminum), but you might be able to make something from plastic.

http://www.vexrobotics.com/vex-robot...gear-kit.shtml

also Lego comes to mind, I think they have some short stroke rack and pinion setups in some of the car sets? My son Steve might know, he still plays with Legos (and he's in college now)

Re: pic: 1726 NURC robot prototype
 

We made a quick little robot tour of our progress to date.

http://www.youtube.com/watch?v=IVfcqfdcpX8

We went on a shopping spree today and bought parts for the other additions to the team ( :) ) along with our new lighting system, some small 3watt apparently pre-watertight lights. Also, we finally took the 'bot for a test night swim and everything worked out perfectly, including the new "appendage" used for picking up objects!

I'll try to get some image up soon in the gallery, but until then you can check out the video :)

Re: pic: 1726 NURC robot prototype
 

SDP-SI also has plastic and brass racks.

Re: pic: 1726 NURC robot prototype
 

Thanks! We order some today!

Re: pic: 1726 NURC robot prototype
 

Where is the night video? You guys are doing great!

We are in the process of making the new ROV for this year. We are calling it Amanda, Tell you the story later. Basically a slightly improved version of last years. We are also making a second ROV much smaller as an assistant. We will post pics soon. We hope to be in the water soon and test as well.

Also, if you want strong magnets, break open non functioning hard drives and use those magnets, they are very strong and light!

Re: pic: 1726 NURC robot prototype
 

Tried looking, can't find it. Nice website though!

Re: pic: 1726 NURC robot prototype
 

On the left is a list of stuff, go to "gears" then "racks" and you'll hopefully find something like this

https://sdp-si.com/eStore/Select.asp...SearchPattern=

but it's a frames web page, so you need to see all the frames at once, and I can't link to all of them at once!

Re: pic: 1726 NURC robot prototype
 

Change the search to "keyword" and type "rack"

Re: pic: 1726 NURC robot prototype
 

Awesome Thanks!

Re: pic: 1726 NURC robot prototype
 

I finally put some night video on youtube

http://www.youtube.com/watch?v=TrQC1tjaLe0

Sorry it took so long!

Re: pic: 1726 NURC robot prototype
 

Looks like you are getting lots of practice in! Great Job!