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11-18-2008, 10:59 PM
| #1 |
| Pebble Pounder Join Date: Jun 2007 Location: Tyler, Texas
Posts: 104
|  Front/rear dig servo keeps burning up. Help! Hey everyone, I built a berg comp rig a while back and it's been running fine with no problems till recently. The problem started with my dig servo. At first, I noticed if I left my front or rear dig engaged for longer than a few minutes, like to BS with one of my crawling buddies or for a smoke break or whatev the servo would burn up. I was running a Hitec HS 55 at first then moved up to an HS 65 thinking it was just a weak servo issue. I set the EPA's where the servo just trips either switch so there's no binding whatsoever by the way. Once I switched to the HS 65 I discovered a new problem. As soon as I plug the battery in, the dig servo goes nuts, glitching and the servo arm constantly moves back and forth like it's trying to find center and cannot be controlled by using the third channel on my transmitter. After about 30 seconds the servo is hot to the touch and I have to disconnect the battery to keep it from frying the servo again. If I take and plug in my 5955 servo into the third channel it works fine - no glitching. I'm currently running a Tekin FXR with a castle bec powering the front servo only and using the ESC's bec to power the RX with a 1320 3 cell lipo, Nomadio React TX and Rx with check point 45T motors. Anyone run into this problem? Oh, my CC bec is set to 6.2V for my steering servo btw. Thanks, Pariah |
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11-18-2008, 11:40 PM
| #2 |
| Rock Crawler Join Date: Feb 2007 Location: wahiawa
Posts: 615
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did you wire it right......the new rc crawler mag from rc driver has a section on how to wire.......
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11-18-2008, 11:45 PM
| #3 |
| RCC Addict Join Date: Jan 2005 Location: Germany north
Posts: 1,669
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is the third channel servo type setting on digital or analog ? the high frame rate for digital servos may smoke analog servos  Last edited by EGRESSor; 11-19-2008 at 07:19 AM. |
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11-18-2008, 11:47 PM
| #4 | |
| owner, Holmes Hobbies LLC   Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
| Quote:
And the illustrators forgot to put power to the RX.... Sounds like a bad servo, probably drawing too many amps. What kind of switches are they? Sounds like they are being stalled. | |
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11-19-2008, 05:22 AM
| #5 |
| Rock Crawler Join Date: Apr 2008 Location: Calgary
Posts: 913
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Make sure you set your end points properly. Like John said, it sounds like they're being stalled out from trying to move further than they actually can. That will burn them out rather quickly.
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11-19-2008, 07:22 AM
| #6 |
| RCC Addict Join Date: Sep 2007 Location: Westland, MI
Posts: 1,508
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EPA's are of the utmost importance, I just fried two steering servos. Because I switched to aluminum steering knuckles and did not reset the EPAs.:-(
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11-19-2008, 08:15 AM
| #7 |
| Pebble Pounder Join Date: Apr 2007 Location: seattle
Posts: 143
| I'm currently running a Tekin FXR with a castle bec powering the front servo only and using the ESC's bec to power the RX with a 1320 3 cell lipo, Nomadio React TX and Rx with check point 45T motors. Anyone run into this problem? Oh, my CC bec is set to 6.2V for my steering servo btw. It could maybe be your Nomadio. We had a few guys in our club use them only to have so many problems with them and not being a consistent radio. My buddy Ryan bought one new and sent it in to be fixed before he even drove his truck. It sound like you got it wired right (maybe post a picture of you set up) Like Mr. Holmes said maybe you just got a bum servo. That would make it a simple fix! Good luck  |
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11-19-2008, 05:05 PM
| #8 | |
| Pebble Pounder Join Date: Jun 2007 Location: Tyler, Texas
Posts: 104
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11-19-2008, 06:11 PM
| #9 |
| Quarry Creeper Join Date: Jul 2006 Location: PDX
Posts: 426
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I had a similar issue when I first set up mine too. My micro servo went cookoo when forward or reverse was engaged. I checked all my connections and endpoints and all was well. I swapped in a 225 and the issue went away. The micro and the 225 were being fed 6v from the CC BEC through the RX. Although mine is a Spektrum DX3R setup. Same ESC though.
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11-19-2008, 06:26 PM
| #10 |
| Quarry Creeper Join Date: Aug 2007 Location: Winnemucca
Posts: 428
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This might make me sound dumb but here goes  After smoking 2 225 servos powering my dna dig I decided to run it with a 985mg I had. The 225's would wiggle some on full throttle, enough to let the dig shift in & out. The 985 would go crazy as soon as the power was on & wouldn't stop no matter what I tried. I'm running a towerpro now with no problems at all. I also tried a hightorque airtronics I had- no problems with it either. This was with a dx3, mamba max, castle bec, 45 turn & 3s 1550 lipo. Are hightech servos more sensitive or something or what else was causing that? Oh ya I also ran a small cs servo for awhile & it worked ok too.:?
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11-19-2008, 06:47 PM
| #11 |
| Quarry Creeper Join Date: May 2006 Location: Snake Run, IN
Posts: 268
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I also had the exact same issue when I was running a Hitec servo (HS81). I changed it to a JR 241 and the problem went away and never returned.
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11-24-2008, 04:29 PM
| #12 | |
| Rock Crawler Join Date: Jul 2008 Location: Chula Vista
Posts: 971
| Quote:
Sounds like the EPA was not set properly. If you increased the EPA it should hold it in place better. My .02 | |
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Linear Mode
