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11-14-2010, 06:05 AM
| #1 |
| Rock Stacker Join Date: May 2010 Location: grass valley
Posts: 71
|  Need help with 7980th problems!!!
I have xr10 with vp upgrades .... Aka crazy steering and a 7980 w/. Cc bec When my truck is working hard and usually in a small to med bind.. The servo will freak out and stick hard in one direction until you unplug it and when you plug back in it is fine.. Any help would be appreciated!! |
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11-14-2010, 06:35 AM
| #2 |
| RCC Addict Join Date: Jun 2006 Location: Maryland
Posts: 1,255
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Are you positive the bec is adjusted to 7.4v?
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11-14-2010, 10:33 AM
| #3 |
| RCC Addict Join Date: Jan 2010 Location: Dallas
Posts: 1,848
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Reading some of the hitec specs today they have a fail safe that shuts stuff off if it gets hot i think. I'm having a similar problem myself. Do you loose throttle also.
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11-14-2010, 10:37 AM
| #4 |
| Rock Stacker Join Date: May 2010 Location: grass valley
Posts: 71
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Yes.. But I will reset it anyways.. Maybe that will help
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11-14-2010, 03:04 PM
| #5 |
| Rock Stacker Join Date: May 2010 Location: grass valley
Posts: 71
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I don't think I lose throttle.. I think servo is the only thing affected
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11-14-2010, 04:18 PM
| #6 |
| I wanna be Dave Join Date: Jan 2009 Location: laying low
Posts: 2,508
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I had the same problem with my brand new hs7980...I ended up sending it back to hitec and they sent me a brand new one..I have not had any problems since..  |
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11-14-2010, 08:48 PM
| #7 |
| RCC Addict Join Date: Jan 2010 Location: Dallas
Posts: 1,848
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I just rebuilt everything tonight and my front end was really snug so I rebuilt everything assuming servo heat is shutting down because of heat and thus shutting down my whole system. Anyway I drilled a hole in my servo plate to get airflow. I also checked my bec and it was already at 6. I am going to run it tomorrow for a bit and see if I can heat it up good and cause it fo fail again. We shall see.
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11-14-2010, 09:03 PM
| #8 |
| Rock Stacker Join Date: May 2010 Location: grass valley
Posts: 71
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I found a bind up in my steering due to a slight bend in the bta arm/slide lever. Replaced with a delrin one piece and will test again.. It is this or send it back
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11-15-2010, 09:53 AM
| #9 |
| RCC Addict Join Date: Jan 2010 Location: Dallas
Posts: 1,848
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Talked to both castle and Hitec today. Here is what we might be hearing. 1. castle said the speed controller is loosing signal and that the external bec might be bad or that the servo is pressing the system. Check both. 2. Hitec asked what radio quickly into discussion and immediately said it sounds like a brown out. I recently added a faster larger dig servo that might be drawing to much through the rx and thus browning out the system. I switched servos for a reason that the wantasummit system fixed as it is. I am going to go back to a 225 and see if this puts less strain on my system. Hope this might help you all some. |
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11-15-2010, 11:38 AM
| #10 |
| no talent hack  Join Date: Feb 2007 Location: Redwood City
Posts: 2,479
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A 7980 can and will pull more amps then a castle bec can handle. Iirc it will pull about 12 amps. The castle bec is rated at 5 amps continuous and 10 amps peak.
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11-15-2010, 05:02 PM
| #11 |
| Newbie Join Date: Jan 2009 Location: cambridge
Posts: 23
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so what BEC should we be using on the 7980's then??
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11-15-2010, 07:41 PM
| #12 | |
| Rock Crawler Join Date: May 2009 Location: Medford, Oregon
Posts: 692
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11-15-2010, 09:35 PM
| #13 |
| RCC Addict Join Date: Jan 2010 Location: Dallas
Posts: 1,848
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Ok. I replaced the digetal dig servo I had and put in a 225. I am still running the same BEC though. I did not have problems with this setup before so I want back the one that brung me. Hope this works!. I have also really worked to free up any binding in my steering to see if that helps.
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Linear Mode
