?? About S3154 servo

[GaFlyer]

Hello I just recently purchased a S3154 Futaba for t-rex450! I adjusted the 401 to digital and put new servo on. I can only get S3154 to turn in one direction! Do I need to reverse in radio or what may be problem?Also I have been told not to run 6V with this servo. Sorry for ? but how do I no if I am running 6v or not? No LHS or flying field aorund me so I'm on my own here! Thanks for any help!

[DavidH]

Don't know who told you not to run this servo on 6 volts. Here is the specs for the 3154

S3154 Digital High Torque Micro Servo
FUTM0654
Volts Torque Speed
4.8V 20.8 oz-in. 0.10 sec/60°
6.0V 23.6 oz-in. 0.09 sec/60°

Dimensions Weight
0.9 x 0.4 x 0.8 in. 0.3 oz.


You will notice that Futaba gives specs for 6 volts. If they did not want the servo operated with 6 volts. The 6 volt specs would have N/A in them.

As for the servo just one direction. Are you sure the servo wheel or horn is centered on the servo? Either put the gyro in normal mode and this will center the servo. Or if your in AVCS mode, wiggle the rudder stick back and forth a few times quickly and then let it go.
This will allow the servo to go to neutral.

Reversing the direction of travel for the servo really does not affect how far the servo travels in each direction.


David

[GaFlyer]

Hey David thx for quick response. I posted about servo in RR and got a couple of responses back about running 6v !?They claimed it would eventullay burn the servo up. I did notice also in paperwork about them giving specs on 6V! One thing I did forget is I had motor unplugged so Im hoping the ESC wouldn't let me initialize the the tail servo! Il try when I get off of work!

[Pinecone]

They burn up on 6V and DS mode. No matter what Futaba says, MANY people have burned them up at 6V.

It takes from 4 - 50 flights to do so, depending on how you fly. But they DO burn up.

At 5V not a problem.

Which ESC are you running? Th eolder ALign 35 was 5V BEC, the new one (with teh V2) is 6V. You can either buy a voltage reducer (used on the Trex 600 for the Futaba 9253/4/6) or stick a diode in the red lead to the servo.

Oh, and those who contacted Futaba about the servos bruning out were told they had never heard of the problem. Funny, when you see the 10th person posting they called and they have still never heard of it happening.

Check in the Trex 450 section and search on S3154, lots of reports of burning them out. And burned one out. Switched to a JR DS3400G and LOVE it.

[j bomb]

On the Align ESC's, check the model number on the label, the 35G has the 5V BEC and the 35X has 6V. The 35G has a gold heatsink and the 35X has a blue one. Also make sure that your gyro gain channel is set to a HH value when you power up or else the 401 won't initialize properly. You'll know it's right when the LED is on solid. You must then switch it to rate mode while still powered up (causing the LED to go out) when setting your servo travel.

[tailStrike]

I've heard of the problem, too from the same sources. With such a minuscule performance gain at 6V, I don't see a need to risk it. I'm happy w/ mine @ 5V

[GaFlyer]

Hey guys I did get Servo to intitialize, as usuall it was Noob error! As far as this servo running at 6v, I have CC35 ESC!I have the USB link so how do I tell if it 6V or not. I bought this heli used already setup so I'm having to work backwards to see how everthing works!