R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 07-06-2009, 02:20 PM   #1
Tech Adept
 
buggydad's Avatar
 
Join Date: Dec 2008
Posts: 237
Trader Rating: 3 (100%+)
Angry Hitec servo issues need HELP

I'm running hitec servos in my truggy.Steering hitec HS-7955TG works great.Throttle hitec HS-985mg and when ever its powered it makes a loud humm Almost like you have to much EPA but louder after about 15 sec the servo starts to get HOT.I played with different RX ports and still does it.I can get it to stop by applying brake very slowly then once i move it again it begins to humm again????????????????????????????????Any suggestions
buggydad is offline   Reply With Quote
Old 07-06-2009, 02:44 PM   #2
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

Quote:
Originally Posted by buggydad View Post
I'm running hitec servos in my truggy.Steering hitec HS-7955TG works great.Throttle hitec HS-985mg and when ever its powered it makes a loud humm Almost like you have to much EPA but louder after about 15 sec the servo starts to get HOT.I played with different RX ports and still does it.I can get it to stop by applying brake very slowly then once i move it again it begins to humm again????????????????????????????????Any suggestions
those 985mg servos dont last very long


throttle/brake servo takes more of a beating than the steering servo


some will disagree but ............................
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 07-06-2009, 02:45 PM   #3
Tech Addict
 
Join Date: Apr 2008
Posts: 544
Default

If I'm not mistakin, thats a analog servo. If you have a radio with HRS mode, make sure it is OFF. It will fry analog servos. Digitals only in HRS. Trust me, I'm speaking from personal experience.
Miniracer23 is offline   Reply With Quote
Old 07-06-2009, 02:50 PM   #4
Tech Champion
 
JAMMINKRAZY's Avatar
 
Join Date: Jun 2007
Location: Pittsburgh PA
Posts: 6,575
Trader Rating: 17 (100%+)
Default

Sounds like you have a linkage issue. If not, send it back to Hitec. They'll send ya a new one.
__________________
-Koby Kubrin-
Thanks to my Sponsors:
Serpent America | Team Novarossi | Desoto Racing | Race AKA | Ridgeway Bodies
JAMMINKRAZY is offline   Reply With Quote
Old 07-06-2009, 02:52 PM   #5
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

Quote:
Originally Posted by Miniracer23 View Post
If I'm not mistakin, thats a analog servo. If you have a radio with HRS mode, make sure it is OFF. It will fry analog servos. Digitals only in HRS. Trust me, I'm speaking from personal experience.
this is a definite possibility
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 07-06-2009, 07:58 PM   #6
Tech Adept
 
buggydad's Avatar
 
Join Date: Dec 2008
Posts: 237
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by Miniracer23 View Post
If I'm not mistakin, thats a analog servo. If you have a radio with HRS mode, make sure it is OFF. It will fry analog servos. Digitals only in HRS. Trust me, I'm speaking from personal experience.
Yup that was the issue turned of HRS and fixed it thanks.Now will this have any ill effects on the 7955
buggydad is offline   Reply With Quote
Old 07-06-2009, 08:59 PM   #7
Tech Lord
 
Frank L's Avatar
 
Join Date: Dec 2008
Location: NorCal
Posts: 12,500
Trader Rating: 148 (100%+)
Default

You will need to run both digital servos if you want to use that mode. Analog servos are better for throttle/ break as they are not as finicky with the linkage, but both digital allow the radio to run its full potential. I have run all digital for the last season and this season without problems.
__________________
- X-Ray/ RC America Team Driver - MKS -
- XB8 - XB8T - XB8 E - OS Spec III - B2102 - 4PXR -
~ SSC ~ Godfather ~ Ironman ~ ButterySmooth ~
Frank L is offline   Reply With Quote
Old 07-06-2009, 09:05 PM   #8
Tech Master
 
ehames005's Avatar
R/C Tech Elite Subscriber
 
Join Date: Nov 2008
Location: Phoenix, Az
Posts: 1,613
Trader Rating: 74 (100%+)
Default

I don't mean to hijack the tread but what is the HRS mode? and does the M11 have that?
__________________
Thank you to my 2017 supporters:
Sworkz--Amainhobbies.com---ProTek Rc---Huston's Engine Service
ehames005 is offline   Reply With Quote
Old 07-06-2009, 11:15 PM   #9
Tech Prophet
 
houston's Avatar
R/C Tech Elite Subscriber
 
Join Date: Sep 2004
Location: portland OR
Posts: 15,088
Trader Rating: 91 (100%+)
Default

Quote:
Originally Posted by ehames005 View Post
I don't mean to hijack the tread but what is the HRS mode? and does the M11 have that?
futaba and it stands for high response system


i would be surprised if your servo made it through the hrs mode . how long did you run it like that ?
__________________
TEAM FUSION X ENGINES / TEAM BYRON ORIGINALS / TEAM PROLINE RACING TIRES / TEAM SICK GRAPHICS /TEAM KYOSHO / things I support: COMP HEAT DEALER /TEAM LUNSFORD/ FUSIONX™ USA / TEAM KYOSHO / "H.E.S."™ / BYRON FUELS / RC-OMGUSA/KICWEBDESIGNZ/AKA TIRES/PROLINE RACING TIRES /RAYA RACING/BUKU POWER CLUTCH/M2CRACING/special thanks to STAV and JIM HOTTIGREENMOUNTAINGRILLS.COM
houston is offline   Reply With Quote
Old 07-06-2009, 11:33 PM   #10
Tech Master
 
Join Date: Aug 2006
Location: Oceanside CA
Posts: 1,075
Default

Most good servos are able to handle HRS mode for a while,at least long enough to figure out something is wrong.Dont take what was sad earlier too seriously the 985 is not really a bad servo its just that we all have been spoiled by the new seryos that came out in the last few years.The 985 will never be a 7955 but its also 1/2 the price & would be considered one of the best servos 5yrs ago. Over kill is just the norm now is all. When you say hot if you mean wow thats unusual the servo should be fine,but if you mean it burned my finger when I touched it send it in before it dies in the middle of an expensive race day.
butch man is offline   Reply With Quote
Old 07-07-2009, 12:42 AM   #11
Tech Elite
 
dishsoap's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jan 2009
Location: Tucson, AZ
Posts: 2,457
Trader Rating: 7 (100%+)
Default

Correct me if I am wrong but digital servos have a slight chatering/ticking noise especially when they are cold.
__________________
HobbyTown USA Tucson!!! HobbyTown USA SRS!!!!
dishsoap is offline   Reply With Quote
Old 07-07-2009, 12:43 AM   #12
Tech Addict
 
Join Date: Nov 2008
Location: tallahassee, FL
Posts: 695
Trader Rating: 29 (100%+)
Default

yes they do!
__________________
kyosho mp9:novarossi 21-4C, nova 2084, 7955TG, dx3R
slayyer is offline   Reply With Quote
Old 07-07-2009, 12:53 AM   #13
Tech Master
 
Join Date: Aug 2006
Location: Oceanside CA
Posts: 1,075
Default

But they should not get hot just sitting idle.
butch man is offline   Reply With Quote
Old 07-07-2009, 04:01 AM   #14
Tech Adept
 
buggydad's Avatar
 
Join Date: Dec 2008
Posts: 237
Trader Rating: 3 (100%+)
Default

I only hade the 9855 plugged in for about 30 sec i was just installing it in my truggy.I reilized something was wrong right away.It didnt get so hot that it burned my fingure but it was hot enough to be surprisedLike i said i switched off HRS and now its fine I was just going to run it but if you guys think theres a chance it may be done maybe i wont
buggydad is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Losi XXX-S TSR6 Electric On-Road 14329 01-26-2015 07:59 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 08:32 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net