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04-07-2009, 09:01 PM
| #1 |
| Rock Stacker Join Date: Apr 2009 Location: mariposa
Posts: 56
|  indavidual wheel dig?
im working on an indavidual wheel dig unit that goes from ingaged to neutral "free wheel" to locked. has any one tryed this yet can it be used in comp? |
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04-07-2009, 09:05 PM
| #2 |
| RCC Addict Join Date: Aug 2005 Location: VARCOR
Posts: 1,826
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Each wheel would be individually controlled for three means of power; drive, open, and locked?
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04-07-2009, 09:25 PM
| #3 |
| Quarry Creeper Join Date: Sep 2007 Location: Central Coast, NSW, Australia
Posts: 277
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Sounds like it would be useful. Where along the axle would you put the mechanism? At the hub or at the diff? And would it be separate to the diff, as in, not utilising an unlocking diff? And does that mean two extra (3 pos) servos and two extra servos? All things to think about!... |
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04-07-2009, 09:38 PM
| #4 |
| Rock Stacker Join Date: Apr 2009 Location: mariposa
Posts: 56
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the mechinisom is in the axle housing, one micro servo per wheel. im making a trip to fresno to get a 10 channel remote, 4 micro servos, and the secret list of parts, stuff from herbor freight should have a working axle around the 16th! a lot of the work is done just going to chang parts to atempt smother engagement |
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04-07-2009, 09:45 PM
| #5 |
| Quarry Creeper Join Date: Dec 2008 Location: Punta Gorda, Flo-rida
Posts: 453
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i was thinking about one of these and through some ideas on paper, but mine would have used 1 servo that would power both wheels dig that would do 4wd or dig, it wouldnt be very practical if when you buy it you have to have a minum of a 4 channel radio. But hey thats my opinion, i just dont have access to a machine shop :-( |
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04-07-2009, 10:00 PM
| #6 |
| Rock Stacker Join Date: Apr 2009 Location: mariposa
Posts: 56
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you should appreceate this. ive worked the last 6 years as a reseach development tech for major paint ball marker co. thay send products to the company im contracted at for anything from, air passaging, computer design, lightening, air consumtion, triger work, exct. the shop ive been working in is a marker lab state of the art so i can make small parts, 5 axis cnc, and a 3 axis micro bed. every thing is housed inside the axle housing exept the servo and linkage. going to herbor freight for cheap tool grade parts |
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04-08-2009, 01:51 PM
| #7 |
| Quarry Creeper Join Date: Jan 2009 Location: El Cajon San Diego
Posts: 417
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For bashing that would be fine. For comps, I believe you are only allowed 2 servos. 1 to steer, and 1 for dig/winch. Someone correct me if I'm wrong. If your secret project only utilizes 2 servos and can engage and disengage under load with consistency and smoothness , that would be awesome. Having both wheels locked for dig works good for me. I don't see too much benefit for having individual wheels locked. Take a look at the Traxxas Summit. They have incorporated a servo operated diff locking dohicky. Might give you some inspiration.
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04-08-2009, 02:38 PM
| #8 | |
| I wanna be Dave Join Date: Sep 2005 Location: Houston, TX
Posts: 16,952
| Quote:
Here are the 2009 rules: http://www.usrcca.com/usrcca_rules_2...-09-master.pdf The closest rule that would apply here is 2.1.6 BTW, there are many 1:1 comp rigs that use line locks to lock individual tires. Last edited by JeremyH; 04-08-2009 at 02:41 PM. | |
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04-08-2009, 03:21 PM
| #9 |
| Quarry Creeper Join Date: Dec 2008 Location: Leesburg
Posts: 244
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This i gotta see  ...subscribed |
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04-08-2009, 03:33 PM
| #10 |
| I wanna be Dave Join Date: Nov 2007 Location: Memphis
Posts: 4,786
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YES! I'm watching. |
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04-08-2009, 09:23 PM
| #11 | |
| Quarry Creeper Join Date: Jan 2009 Location: El Cajon San Diego
Posts: 417
| Quote:
Thanks for the correction. It's been a while since I read the rules and I remembered something about 2 channel or 2 servo's or something like that. It was the 1.9 class. I know that 1:1 comp rigs use line locks, but I don't know if that would benefit a R/C rigs turning radius in dig. Only one way to tell I guess. There is another thread I just finished reading that might be helpful if you want to use multiple channels and don't like using the sticks in a stick radio. This would be cool in a scaler. I remember someone built a tuber with a hydraulic steering system, front dig with a disc brake and a lot of custom stuff. Individual locking wheels would be icing on the cake. | |
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04-08-2009, 09:59 PM
| #12 |
| Quarry Creeper Join Date: Feb 2009 Location: In my house
Posts: 243
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I think that cutting brakes (essential what you are working on) would work even better than the standard dig. I was looking at a way to do it my self, but my thoughts were that I could only do it if I ran a differential in the rear axle instead of a spool. With your plan you could still run a spool, THAT would kick ass.  |
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04-08-2009, 09:59 PM
| #13 |
| Rock Crawler Join Date: Sep 2008 Location: Kennesaw
Posts: 630
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Seems it would be easiest to have a motor drive each wheel. Then you could modulate each one, like a berg.
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04-09-2009, 02:19 AM
| #14 | |
| Rock Stacker Join Date: Apr 2009 Location: mariposa
Posts: 56
| Quote:
that was the origanal plan to buy 2 berg kits cut the axle in half tig weld the tubes together, I got turned off by the idea when i started to add up two berg kits $600, 4 goats $800, good 6 channel $400 enough lipos to run it $300. maby if i win the lotto im traiding some work for a 10 channel air radio. i orderd a case of 24 micro servos for $55 4-5mm deep sockets 4-5mm 12pt sockets 8-5mm allen wrenches 4-8mm nuts 4-8mm 12pt sockets trip to herbor freight$27 need to spend some time on a bench milling parts. everything looks good so far, | |
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04-09-2009, 02:31 AM
| #15 | |
| Rock Stacker Join Date: Apr 2009 Location: mariposa
Posts: 56
| Quote:
the plans call for a full spool yes. i get excited when i start talking about it. ill post the brain storm i came up with, its actualy going to work the way i wanted for once. thay might be a little hard to understand. | |
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04-09-2009, 04:05 AM
| #16 |
| I wanna be Dave Join Date: Sep 2005 Location: USA
Posts: 11,196
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Would it not be easier to have a Locker (Spool) that can be open or Locked? When combined with a MOA. All that is left is a Dig Switch. Like a Rock force mod'ed into a MOA type axle.
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04-09-2009, 05:17 AM
| #17 | |
| RCC Addict Join Date: Jul 2008 Location: Sin City
Posts: 1,332
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04-09-2009, 05:19 AM
| #18 | |
| I wanna be Dave Join Date: Sep 2005 Location: USA
Posts: 11,196
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04-09-2009, 05:27 AM
| #19 |
| Newbie Join Date: Mar 2009 Location: Dickson
Posts: 37
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Neat idea. You could do like you can on tractors where you can lock one rear wheel and pivot around it.
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04-09-2009, 09:15 AM
| #20 |
| Quarry Creeper Join Date: Jan 2009 Location: El Cajon San Diego
Posts: 417
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Are you going to make axle shaft digs? That would work out real good. What axles are you using? And I take back what I said earlier about this not working as well for R/C application. I was still thinking just one servo to operate the dig. One wheel locked and the other in free wheel would be sweet.
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Linear Mode
