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HomeAircraftHelicopterHelicopter Main Discussion › I keep on destroying throttle servos
04-24-2009 02:40 AM  9 years agoPost 1
Twrecks600

rrKey Veteran

Round Rock, Texas

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Does anybody know if the throttle jockey pro regulates the voltage to the throttle servo? I have gone through 3 throttle servos on my 600N in the past 5 months and I can't figure out why!! I am using lower end servos so maybe that's the issue?? I am tired of not being able to rely on my machine to perform like I expect it to!!

Thanks!!

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04-24-2009 02:43 AM  9 years agoPost 2
cmsilvoy

rrKey Veteran

Durham, NC

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TJ pro only regulates power to its own components.
It does not regulate the power bus.
SO, if you are running the bus at 6v or worse at 7.2 and you have a low end 4.8v servo, you are going to fry it quick.

You need a step down to the servo...

Chris

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04-24-2009 02:51 AM  9 years agoPost 3
30636086

rrKey Veteran

Tacoma, WA

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what servos are you using?

I dont suffer from mental iIlness, I actually enjoy mine!

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04-24-2009 03:07 AM  9 years agoPost 4
baddynergy

rrElite Veteran

sierra madre, ca- usa

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what servos are you using?
My guess, 821s..

Darn it he's offline, so we may never know what servo..

**Unattended children will be givin a shot of espresso and a puppy**

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04-24-2009 03:12 AM  9 years agoPost 5
helicopterMark

rrKey Veteran

Rumson, NJ

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yeah those LOVE vibration

Mark Schneider
Team Heli Wholesaler; Rotor Rage; YS; Perfect Regulators
www.helimark.com

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04-24-2009 03:32 AM  9 years agoPost 6
TaleGunner

rrElite Veteran

Deer Park WA

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What are you guys talking about an 821 is a perfectly good servo and works very well, until it doesn't

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-24-2009 03:46 AM  9 years agoPost 7
jschenck

rrProfessor

La Vista, NE.

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If you are running the TJ Pro in 'digital servo' mode and are using servos that are not capable of the high frame rate output you'll kill 'em. Make sure the TJ Pro is in 'analog servo' mode for any servo that is not a high frame rate servo.

Same goes for the tail servos. "DS" mode only for servos designed for high frame rate. This does NOT mean digital servo vs. analog servo. e.g. the JR 810G is an analog servo that is designed for high frame rate. You need to look up the specs on your servo. If you don't know run the TJ in analog servo mode.

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04-24-2009 04:13 AM  9 years agoPost 8
Twrecks600

rrKey Veteran

Round Rock, Texas

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I ran a JR NES-537

How do you change the TJ Pro to digital servo mode? There are no switches on the unit.

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04-24-2009 04:22 AM  9 years agoPost 9
Twrecks600

rrKey Veteran

Round Rock, Texas

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After doing much research, the TJ Pro DOES have high frame rate support in the unit. The old TJ did not. I guess that answers my question!!

Next question is what servo will serve me well? I don't want to spend $80.00 on a throttle servo so what do I need?

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04-24-2009 04:28 AM  9 years agoPost 10
Swoop

rrElite Veteran

Newark, DE USA

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Digital servo mode is selected during calibration. To get DS mode, you raise the stick after calibration and exit the cal mode while at high stick (as opposed to low stick)

The website has a manual, however I can't get on the site now for some reason.
Next question is what servo will serve me well? I don't want to spend $80.00 on a throttle servo so what do I need?
Contrary to popular believe, I have had good luck over the past 2 years with my $30 JR821 operating in normal frame rate with my TJ pro

Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35

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04-24-2009 05:05 AM  9 years agoPost 11
devious17

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Malaysia

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I hope the servos arent binding. Is digital or analogue a concern with the TJ Pro?

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04-24-2009 05:07 AM  9 years agoPost 12
cdrking

rrElite Veteran

Seattle

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Next question is what servo will serve me well? I don't want to spend $80.00 on a throttle servo so what do I need?
Or save up a few throttles worth of money and buy a good one. I've used Futaba 9252's on the throttle and they work fine.

To hover is divine, the alternative is rather PLANE.

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04-24-2009 06:26 AM  9 years agoPost 13
Paul Woodcock

rrElite Veteran

Dubai - United Arab Emirates

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Hi

Someone did mention binding. To add to the comment.....

It sounds like an obvious thing, but most people only check the full throttle side for binding and the low throttle side for a steady idle.

The throttle cut can be a problem. Make sure that the throttle cut goes to closed throttle with no binding. After shut down, the radio could be on for a min or two as you fetch the heli and carry it back before turning it off. By then a servo, esp a digital servo, could be fried.

I also use 'good' servos for throttle. If the servo fails in a bad possition..... it could lead to a crash.

Regards
Paul

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04-24-2009 11:44 AM  9 years agoPost 14
airdodger

rrElite Veteran

Johnston USA

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You already spent around $80, you could have bought a good servo.

Chris

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04-24-2009 12:17 PM  9 years agoPost 15
T-Rex-Flyer

rrElite Veteran

Panama City, Fl

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Hind-site is always 20-20

If the wings are traveling faster than the fuselage, it's probably a helicopter.

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04-24-2009 01:48 PM  9 years agoPost 16
cudaboy_71

rrElite Veteran

sacramento, ca, u.s.

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use a mid or micro digital servo. not like throttle requires a ton of torque. a gov just needs the speed. i'm using a S9650 and just cut a frame adapter. could probably use a HS5065 with good results, too.

if it ain't broke, break it.

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04-24-2009 02:06 PM  9 years agoPost 17
jschenck

rrProfessor

La Vista, NE.

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I use Hitec HS525 on the TJ Pro'd heli's, they work great for me. I have even used HS425's. I have not needed a high end digital coreless servo for the throttle, just need a reliable servo. I'd bet a standard analog $20 servo will last a long time on the throttle if it's setup properly.

Something else to consider. Have you dialed in your clutch? excessive high speed vibrations could be transmitted through the throttle link killing your servos.

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04-24-2009 02:26 PM  9 years agoPost 18
USNAviationjay

rrElite Veteran

Houston Tx USA

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I use Hyperion DS20 GMDs (tail servo version) on my throttles.
High speed high torque double ball bearing metal gear digitals full size servos.. and they are only 40 bucks a pop.

I liked them so much I tried the entire set of cyclic servos the FMD on my second Vibe.. and they are outperforming my JR 8311s which are over double the price each.

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04-24-2009 05:51 PM  9 years agoPost 19
TaleGunner

rrElite Veteran

Deer Park WA

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I ran a JR NES-537
did you send them back to horizon service? they will check them out tell you why they failed or replace them if they are as new as you reported. ether way you win.

CRASH! GLUE! REPEAT!
Spectra-G, Ion X-2

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04-24-2009 05:53 PM  9 years agoPost 20
VooDooX

rrElite Veteran

San Francisco Bay Area CA, US (San Mateo)

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i say you get a good servo if you had a good servo in the first place you wouldnt have had to get 3 and spend more then the 1 good servo woulda cost..

Velocity 50 "99.9999999999999% of an atom is empty space." also 01001000 01001001

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HomeAircraftHelicopterHelicopter Main Discussion › I keep on destroying throttle servos
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