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Sienna
11-12-2008, 08:43 PM
I am working on a new robot based on the Lynx tracks for outdoor use.

Robot is approximately 20"x13.5"x7". Totally enclosed electronics bay, which can be sealed from things like rain and dust.

Robot does not have the top plate shown, as it covers everything that is exposed.

Here are some design pictures:
http://forums.trossenrobotics.com/gallery/files/1/6/8/5/storn_jr_frontleftiso_thumb.jpg (http://forums.trossenrobotics.com/gallery/showimage.php?i=814&c=3&userid=1685)

http://forums.trossenrobotics.com/gallery/files/1/6/8/5/storm_jr_frontleftiso_bot_thumb.jpg (http://forums.trossenrobotics.com/gallery/showimage.php?i=813&c=3&userid=1685)

http://forums.trossenrobotics.com/gallery/files/1/6/8/5/storm_jr_backrightiso_thumb.jpg (http://forums.trossenrobotics.com/gallery/showimage.php?i=812&c=3&userid=1685)

I will be building this shortly, as soon as I get quotes back from the laser cutters.

Sienna
02-01-2009, 06:38 PM
Well, built it....
Looks like it handles the snow and ice and outside well enough. Snow and melt wasn't getting into the electronics bay, so I think that part works.

However, the motors are definitely undersized... They had a very hard time on the carpet turning. (using the banebots 380 gearbox series.) In the outside test, one of the motors completely blew up (smoke flooded the motor compartment). so, the test didn't last long.

Now, I am not sure if the motor was defective before I got it, as it was REALLY hard to turn. (as in it took all my strength almost to turn the output shaft. I suspect that there was some contaminant in the gearbox that was causing the issue, however I couldn't check as I didn't have the proper screw driver to open the gearbox. (Banebots uses some weird screw size, it seemed to be a #1 head but the hole for the screw driver only accepted a #0 screwdriver.) The other motor didn't have this issue. I'll have to take the tank apart after its dry later and figure out if the motor I think had a manufacturing fault actually was the one to fail.

Pictures later.

DresnerRobotics
02-01-2009, 06:52 PM
No, pics now! :p

sam
02-01-2009, 09:32 PM
Pretty nice project!

I too would like to see some pictures of it in action, that is if you get the motor to get to work.:happy:

ooops
02-02-2009, 08:22 AM
Sorry to hear about the motor dilemma.
I am sitting on the edge of my seat to see the pictures:)

Sienna
02-02-2009, 07:11 PM
Pics
http://forums.trossenrobotics.com/gallery/files/1/6/8/5/storm_jr_1_thumb.jpg (http://forums.trossenrobotics.com/gallery/showimage.php?i=977&c=3&userid=1685)

http://forums.trossenrobotics.com/gallery/files/1/6/8/5/storm_jr_2_thumb.jpg (http://forums.trossenrobotics.com/gallery/showimage.php?i=978&c=3&userid=1685)

http://forums.trossenrobotics.com/gallery/files/1/6/8/5/storm_jr_3_thumb.jpg (http://forums.trossenrobotics.com/gallery/showimage.php?i=979&c=3&userid=1685)

http://forums.trossenrobotics.com/gallery/files/1/6/8/5/storm_jr_4_thumb.jpg (http://forums.trossenrobotics.com/gallery/showimage.php?i=980&c=3&userid=1685)

DresnerRobotics
02-02-2009, 07:33 PM
WHOA. :O

That's really all I have to say.

WHOA.

jes1510
02-02-2009, 07:43 PM
That thing is awesome. Did you cut the panels yourself? How?

Sienna
02-03-2009, 03:47 AM
That thing is awesome. Did you cut the panels yourself? How?
Hehe, not at all. I cut holes for the Sabertooth, thats all. :P

I can't cut a straight line to save my life. So, anything that I do that entails sheets of plastic, I send out to get lasercut. (The entire chassis is made from .118" polycarbonate. You can probably see the burn marks from the laser in the photos. It gives the edges that appear "brownish".)

ooops
02-04-2009, 11:21 AM
Very cool! This looks more awesome every time I look at the pictures.
Funny how a "blown motor" at the drag strip is cool, but a "blown motor" on a bot is, well, bad.
Are you at liberty to share your goal for this bad @ss bot?

Adrenalynn
02-04-2009, 11:40 AM
Unless you blow the motor at the strip. 'Cause that really blows.

But blowing the motor in your vacuum doesn't suck...

Sienna - I smoked two banebots 385's. That combined with your experience makes me leary of putting these replacement warranty 385's into this competition bot. I'm starting to wonder if I shouldn't consider some other motor option...

Adrenalynn
02-04-2009, 11:43 AM
I have three new ones here. One I can't rotate by hand without pliers. One is a "little" tight - but will turn by hand without cutting up my fingers. One turns by hand easily. The first one to smoke I couldn't rotate without pliers. The second one to smoke was a "little tighter" than the "little tight" above. Hmmm. Pattern of behavior?

Sienna
02-04-2009, 03:59 PM
I didn't even know they had a warrenty! (Problably not for me, as I am over my 30 day limit and I bought them from Trossen anyway.)

I figure even if the motor is smoked, if I can get gearbox open (with that funky screwdriver I don't have), then I can replace the motor, and look to see if its a tolerance issue that is jamming up the gearboxes, a grease issue, or a grit issue. (Or just good old Chinese manufacturing.) If its something easily fixed, maybe they can still be used on light robots like stock tri-track chassis.

In other news, along with the grab bags, I also ordered a pair of the BB 36mm 36:1 540 series gearboxes to work a new design around. I'm hoping that those are better quality. If not, then no more BB products for me anymore.

Adrenalynn
02-04-2009, 04:21 PM
I'm hesitant to disassemble the blown ones that are going back here. I have a smaller motor from last year that had issues initially. I pulled it apart (full set of security screw drivers, dontcha know... ;) I do camera work...) stripped the gum that passes for grease, and repacked it in teflon suspended in light white lithium high-speed grease, and it worked like a champ. Quieted it right down too.

That said, the one last year was a two-stage/level planetary gearbox and it was a PITA to line-up all those widdle gears, get the second stage back on, then line those widdle gears up... Definite microsurgery tweezers and hemostats and a WHOLE lot of rather colorful language...

ooops
02-04-2009, 04:27 PM
Well since you are talking about the Teflon lubricant I am going to through in a cheap plug for a friend of mine -
Check out the Tefgel http://www.tef-gel.com/
It is a "money is no object" solution but pretty much the best lubricant money can buy.

sam
02-04-2009, 05:59 PM
Wow! that Thing looks big compared to the tiny tri-track :robotsurprised:

Very nice base you did there!

Sam

elios
02-04-2009, 08:49 PM
wowowow. there are truly some incredible robots showing up this new year!

Ironman
02-04-2009, 09:10 PM
FIRST teams had bane bot transmissions two years ago. (first and last year)

the output shaft coupler didn't quite sit planetary carrier, and it basically resulted in epic failure of many many transmissions and hundreds of frustrated highschool students.

banebots can only be used if you go through and double check all of their work and use a different lube. that's my rule at least.