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07-17-2014, 11:47 PM | #61 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
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I've ran the bfg krawlers now on a bunch of different terrain and I really like them. They grip great on almost all surfaces except really loose dirt. On Mon I had a wire disconnect from the board inside the hitec servo I was running. Went to the lhs and the ones they had were way over priced. So I ordered a stock exceed 9kg servo from nitrorcx and added a couple sets of axle tubes since some of the hub holes are a little stripped. Total cost $32 after regular usps shipping. They got delivered today and the lhs finally got in the 55t axial motor I ordered a couple weeks ago. They seem to not be the best run shop imho. Put in the motor with the other stock 12t pinion and now I have equal gearing f/r. Thought I was liking the od/ud but now that it's back to even I can see it was hindering me some. Made dirt climbs easier and better grip at steeper angles. I swapped out the new servo for the stock axial one a friend gave me and the difference is night and day. The exceed has about the same torque rating as the 645mg I previously had. I have my wheels/tires all closely weighted at about 260g front 255g rear. Turns them just fine. Have yet to try my treps which all weigh 280g. Stock madtorque 2.8 wheels/tires weigh about 245g each. |
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07-17-2014, 11:59 PM | #62 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
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The new axle tubes will get put on in the next few days. While I have everything pulled apart I'm goin to cut the frame down some. May narrow it as well, still undecided. Have an idea for a new skid with integrated bottom link mounts and a new upper link mount for the axle I wanna try. Will probably have to make new bottom links or alter mine a little as I want to mount the shocks to the axle. Kinda wanna try a dual servo setup similar to this one too. Will post pics when I make some progress. |
07-18-2014, 05:50 AM | #63 |
Rock Stacker Join Date: Apr 2008 Location: Bayonne
Posts: 85
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The dual servo setup does increase turning power, but I've found that even if you think you aligned them perfectly, they're usually fighting each other. With two high powered servos, fighting for position you'll drain the battery, just sitting there.
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07-19-2014, 10:42 PM | #64 |
Rock Stacker Join Date: Feb 2014 Location: Irmo, SC
Posts: 68
| Re: Exceed mad torque 1/8 to 1/10 scale budget build!
Yeah, seems complicated, although I have seen 3D planes with multiple servos on one control surface. Seems easier and cheaper to just use one strong servo.
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07-19-2014, 11:44 PM | #65 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
| Thanks I'll keep that in mind.
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07-19-2014, 11:48 PM | #66 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
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07-21-2014, 10:44 AM | #67 |
Rock Crawler Join Date: May 2013 Location: Somewhere in space
Posts: 931
| Re: Exceed mad torque 1/8 to 1/10 scale budget build!
If you're running dual servos up front then simply make sure that there both aligned well and the trims are 0 percent on both of them before you put the horns on. Or to save time, you could get one single servo and be done with it. Here's a link to a servo that just might fit you well: Solar Servo D772 High Voltage 0.17sec@7.4v 64g Digital Metal Gear Its a great budget servo and has plenty of torque for the price. For 20 bucks I'd say its worth a shot. |
07-21-2014, 02:13 PM | #68 | |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
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07-26-2014, 11:17 AM | #69 | |
Pebble Pounder Join Date: Jul 2014 Location: Oregon coast
Posts: 174
| Re: Exceed mad torque 1/8 to 1/10 scale budget build! Quote:
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07-26-2014, 12:49 PM | #70 |
I wanna be Dave Join Date: Jan 2009 Location: New Port Richey, FL.
Posts: 2,545
| Re: Exceed mad torque 1/8 to 1/10 scale budget build!
You really need a servo programmer along with programmable servos if you are to use multiple servos to control one thing. This way the will work together 100% with no interference with each other. Two steering servos do look cool though!
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07-26-2014, 09:09 PM | #71 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
| Re: Exceed mad torque 1/8 to 1/10 scale budget build! |
07-26-2014, 09:10 PM | #72 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
| Re: Exceed mad torque 1/8 to 1/10 scale budget build! Know of any good cheaper ones?
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07-26-2014, 09:28 PM | #73 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
| Re: Exceed mad torque 1/8 to 1/10 scale budget build!
Made some changes to my truck. Got a 5 ft stick of 1/4" alum rod and a plate of .090 alum for less than $3 from a local machine shop. Got to work makin my new skid. Amazing what you can do with a vice, hacksaw and file. Did this at a friend's sisters house and her bf pulled out a case of random parts from some nitros he used to have. Told me to take anything I might be able to use. Had more than a whole set of one piece stainless links with what I believe are revo ends and a hitec 5997 titanium gear servo. Tested and it works great. I think I'll save this as a backup for the stock exceed. |
07-26-2014, 09:57 PM | #74 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
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Stripped down the frame and cut about 1" off the bottom. Bolted one the new skid and changed out the cuttingboard links for some of the stainless ones. Shocks now mount on the axle inside of the bottom links. Took the pieces I cut off my rear bumper mount and drilled a hole and bolted it to the front axle ylink mount. For the back I used a link end mounted the same, now it's kind of a 4 link. Used 2 more of the stainless links for the rear uppers and took off the y end off the front and added ends from my stock bottom links. Had to play with mounting positions a little but got it workin good. Last edited by Crawlin' Lobster; 07-26-2014 at 11:05 PM. |
07-26-2014, 10:11 PM | #75 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
| Re: Exceed mad torque 1/8 to 1/10 scale budget build!
How it looks with the body. Did a little testing on the course. Flex comparison with a buddies deadbolt. As much as I liked my first homemade links, I gotta say metal ones look much better on the truck. |
07-26-2014, 10:45 PM | #76 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
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After testing decided to start making new custom links with the 1/4" alum rod. Went and got a pack of revo rod ends and a 8-32 bottoming tap and drill bit. Cut some pieces of allthread and tapped the rod ends. Again only used basic hand tools. Next I cut some pieces of the alum rod to start bending my links. Clamped them by pairs in a vise to keep the bends even. That part was somewhat simple the hard part was making the opposing bends. Came out pretty dang close. The rears have the more extreme bends. Marked out how long I needed than after the bends and cut. I used a small socket as a guide to drill out about 1/4" down in the ends of the links the threaded the hole. Was easier than I expected it be. Threading these holes was a little tedious as it required backing out and clearing the hole every few threads but not hard to do. Sorry for the bad angle on the pic but they are even. |
07-26-2014, 11:04 PM | #77 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
| Re: Exceed mad torque 1/8 to 1/10 scale budget build!
They mount inside of the frame now and closer to each other f/r. Had to mount the upper links higher as well. With the bends they clear the frame nicely when flexing. Made a plate for the battery to mount right over the skid out of a piece of roof flashing then installed electronics. Then the body. Wood pile test. Lemme know what you guys think. |
07-27-2014, 07:28 AM | #78 |
Rock Stacker Join Date: Apr 2008 Location: Bayonne
Posts: 85
| Re: Exceed mad torque 1/8 to 1/10 scale budget build!
Any rub on the body?
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07-27-2014, 09:00 AM | #79 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
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07-28-2014, 08:16 PM | #80 |
Quarry Creeper Join Date: Jun 2014 Location: 36oly
Posts: 322
| Re: Exceed mad torque 1/8 to 1/10 scale budget build!
Had an idea for a bottom link/shock mount adapter plates so I made a some mock ups using a heavy duty washer. It will allow the bottom link to mount almost below the axle and the shock will be above. First attempt didn't quite have enough room for the link ends to smoothly function so I made another one. Should work good but I think I'll try to make the rest out of alum. Any thoughts? |
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