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05-11-2007, 11:29 AM
| #1 |
| Newbie Join Date: Apr 2007 Location: Montreal
Posts: 16
|  Scratch built crawler
Hi All! Saw these motors online a few weeks ago, thought i might be able to make a crawler out of them. They're from solarbotics.com and produce 50oz in of torque at 6v. My first design was to use bits from another car and attach the motors to dogbones in place of a differential. I then simplified the idea by using bearings between the motor and the frame, glued together and held with molded plastic. http://picasaweb.google.com/jimboinue/RcStuff the two axles will be held together with an aluminum rod glued into a bearing which is pressed into the cuttingboard piece. Last edited by jimbo_style; 05-12-2007 at 01:17 PM. |
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05-11-2007, 11:31 AM
| #2 |
| Rock Crawler Join Date: Oct 2006 Location: England, Where the birds fly backwards.
Posts: 626
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picis no worky!
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05-11-2007, 11:46 AM
| #3 |
| Newbie Join Date: Apr 2007 Location: Montreal
Posts: 16
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sorry bout that...they do now  |
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05-11-2007, 11:59 AM
| #4 |
| RCC Addict Join Date: May 2006 Location: In England, looking for the threadlock...
Posts: 1,150
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Links still don't work for me...
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05-11-2007, 12:05 PM
| #5 |
| Pebble Pounder Join Date: Mar 2007 Location: Merritt Island
Posts: 158
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Make your pics public rather than unlisted.
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05-11-2007, 12:15 PM
| #6 |
| Newbie Join Date: Apr 2007 Location: Montreal
Posts: 16
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they work when i click on them... here's my picasa with all the pics http://picasaweb.google.com/jimboinue/RcStuff if anyone could tell me how to make the pics show up in the post, that'd be great. |
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05-11-2007, 12:18 PM
| #7 |
| ΜΟΛΩΝ ΛΑΒΕ   Join Date: Dec 2006 Location: In tha Bush of Louisiana
Posts: 4,343
| yea they
work
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05-11-2007, 12:19 PM
| #8 |
| ΜΟΛΩΝ ΛΑΒΕ Join Date: Dec 2006 Location: In tha Bush of Louisiana
Posts: 4,343
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thats very diff.
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05-11-2007, 01:03 PM
| #9 |
| RCC Addict Join Date: May 2006 Location: In England, looking for the threadlock...
Posts: 1,150
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Now that, is cool.  Nice work.Might want to rethink your steering setup, that ziptie around a motor looks like it has a lot of play. |
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05-11-2007, 01:59 PM
| #10 |
| Newbie Join Date: Apr 2007 Location: Montreal
Posts: 16
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hmm...good suggestion, but if i was going with this setup i'd epoxy the zipties to the motors. I was wondering whether to go ahead like this, or to make two rear axles and then uses switches to make it "tank steer." The rear's a lot stronger than the front and will be able to put up with a lot more abuse...Waiting for the bearings to arrive before I can do anything at the moment though.
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05-11-2007, 02:24 PM
| #11 |
| Quarry Creeper Join Date: Feb 2007 Location: East Aurora
Posts: 289
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yea man it looks pretty inventive, maybe alittle to inventive for my taste but great job!
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05-12-2007, 01:04 PM
| #12 |
| Newbie Join Date: Apr 2007 Location: Montreal
Posts: 16
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since the steering setup's proving to not be all that strong, i made a drawing of a different, hopefully more sturdy setup http://picasaweb.google.com/jimboinu...53922173980418 Last edited by jimbo_style; 05-12-2007 at 01:13 PM. |
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05-12-2007, 01:31 PM
| #13 |
| RCC Addict Join Date: Mar 2007 Location: St. Louis (High Ridge)
Posts: 1,279
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it may be sturdier, but it will require an enourmous servo to swing it. The further away fom the tire center line the steering centerline is, the larger the lever arm is, and the effort that is required is greatly increased. could you mount the motor on a pivot plate at the output end instead of on the back of the motor? got a link to the motors? |
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05-12-2007, 03:09 PM
| #14 |
| Newbie Join Date: Apr 2007 Location: Montreal
Posts: 16
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not sure if i'd be able to do that....i have limited space on the wheel side of the motors as it is... motors:solarbotics.com, they're the GM3s |
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05-12-2007, 07:34 PM
| #15 | |
| TEAM MODERATOR  Join Date: May 2004 Location: Tennessee
Posts: 10,855
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05-12-2007, 09:02 PM
| #16 |
| Newbie Join Date: Apr 2007 Location: Montreal
Posts: 16
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um, yes...its actually quite a lot, I took them apart and disabled the slipper, and there's tons of torque...hopefully you'll see soon once its done and I get a vid up |
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05-12-2007, 09:27 PM
| #17 | ||
| TEAM MODERATOR Join Date: May 2004 Location: Tennessee
Posts: 10,855
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Quote:
Anything less that 1 full horsepower ain't worth having:-P :-P  2 horsepower is more like it though | ||
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05-13-2007, 04:03 PM
| #18 |
| Newbie Join Date: Apr 2007 Location: Montreal
Posts: 16
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oh, good...lol i was thinking of making this a torsion type design, i'd have the aluminum rod on a bearing holding the two halves together, then I'd use a flexible ruler attached near it to control flex! |
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