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09-10-2009, 09:56 PM
| #1 |
| Quarry Creeper Join Date: Mar 2006 Location: Lutz
Posts: 457
|  Where to get EPA pots for TQ3 EPA mod?
Hey everyone, I recently bought some hitec 1/4 scale servos for my super to replace my towerpro servos and i want to put EPA pots on my TQ3. Now i`m wondering where to get the parts for them and what do i exactly need? (Like the names of the parts and stuff) Im guessing some where like Radio Shack may not have these parts ? Also, I know the EPA pot mod is a great thing....but is it absolutely necessary to use EPA pots with these 1/4 scale servos? I mean i do not want to burn up these servos of course but if i can get away with not doing the EPA mod then that would be great also, i just want to get my super up and running again. |
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09-10-2009, 10:26 PM
| #2 |
| Rock Stacker Join Date: Jul 2008 Location: alexander city
Posts: 95
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09-10-2009, 10:45 PM
| #3 | |
| RCC Addict Join Date: Apr 2006 Location: Brighton
Posts: 1,015
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Found this in Fritobandito's postings here: My Modded TQ3 Update - Added EPA pots Quote:
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09-11-2009, 01:39 AM
| #4 |
| Rock Crawler Join Date: Feb 2008 Location: UK
Posts: 818
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The EPA mod is only needed if your servos travel too far, binding at the end points. The mod reduces travel - it doesn't increase it. Fitting a shorter servo arm also reduces steering travel. I get all my components on eBay. Any 2K pot will work - just find one that physically fits. |
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09-11-2009, 10:09 AM
| #5 |
| Quarry Creeper Join Date: Mar 2006 Location: Lutz
Posts: 457
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Yea thats what i want to do, i want to limit the travel of the servo so its not fighting the linkages and the knuckles because the servo wants to go more then the knuckles can go. I heard thats what burns up the high torque servos is to have them travel more then the knuckles can handle and then it just burns up the servos. (Right?) But if i just shorten up the servo arm itself, then it will shorten up the throw of the steering itself? Myabe that will help?
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09-11-2009, 10:54 AM
| #6 |
| On the lookout for Rocks   Join Date: Mar 2006 Location: Monroe, Louisiana
Posts: 3,711
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RadioShack has them.
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09-11-2009, 11:36 AM
| #7 | |
| Rock Crawler Join Date: Feb 2008 Location: UK
Posts: 818
| Quote:
EPA will solve the problem, as will shortening the servo arm. Adjusting the travel on the radio (EPA) is easy, but shortening the servo arm is actually better, as it'll give you more effective torque at the wheels. | |
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09-11-2009, 04:28 PM
| #8 |
| Quarry Creeper Join Date: Mar 2006 Location: Lutz
Posts: 457
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Yea, it will give me more torque due to the lack of distance between the link mount and the part that the servo arm screws to right? Thanks for the advise guys.....awesome stuff  |
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09-15-2009, 12:56 PM
| #9 |
| Quarry Creeper Join Date: Mar 2006 Location: Lutz
Posts: 457
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Ok im running into problems finding EPA pots here locally. I think im going to recieve my 1/4 scale servos soon (atleast i think i am) and i want to run these servos till i can find some EPA pots to mod my tq3. Now is it goign to be safe to just shorten up the steering link that goes from the servo to the steering knuckle on my clod axles just for the time being? Or will i still run the risk of burning out my 1/4 scale servos due to the lack of EPA pots? Actually since i think about it, i might even upgrade my radio if i can find these pots, whats a good but cheap 3 ch. radio with EPA pots? (just for future reference)
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09-15-2009, 01:44 PM
| #10 |
| Quarry Creeper Join Date: Feb 2009 Location: Rocklin, CA
Posts: 255
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Do you have any old junk radios laying around or have access to one? Rob the throttle and sterring center pots from an old radio.  |
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09-15-2009, 04:33 PM
| #11 |
| Quarry Creeper Join Date: Mar 2006 Location: Lutz
Posts: 457
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I actually dont. :( I wish i did though Im really worried to burn these good servos up. So im guesing running the servos without pots will not be a good option then huh? This isnt a comp rig or anything, just a basher crawler.
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09-15-2009, 04:45 PM
| #12 | |
| Rock Crawler  Join Date: Sep 2006 Location: Lititz
Posts: 787
| Quote:
You want to mount the underlined link onto the servo arm closer to the servo spline so that the throw of the servo will be reduced. This will also give your servo added leverage on the the tires. | |
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09-15-2009, 06:25 PM
| #13 |
| Quarry Creeper Join Date: Mar 2006 Location: Lutz
Posts: 457
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Ok, i think i got it. I got them in today and these things are some big servos! I was actually looking at my link that goes from the servo arm to the knuckle and if i shorten it i wont get as much steering throw only when i turn the wheels right. So i might have to change my steering setup or something.
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09-15-2009, 07:56 PM
| #14 |
| Rock Crawler Join Date: Sep 2006 Location: Lititz
Posts: 787
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You do not need to change the length of the linkage that connects the servo arm to the knuckle. You simply need too move where the link is connected to the servo arm. |
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09-15-2009, 08:07 PM
| #15 |
| Quarry Creeper Join Date: Mar 2006 Location: Lutz
Posts: 457
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Well thats what im getting at, the original one i made is still too short. When i cycle the steering from left to right, it only locks out on the left side....the right side does not turn all the way if i mount it closer to the servo splines. I`ll figure it out. I need to just remount the servo to the other side of the axle. Ive seen someone here ( i cant remember his name) but he mounted his 1/4 scale servo on the passenger side of the axle and just mounted it as low as he could. Seemed like a really nice setup for the Clod axles.
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