Servo problem, please help.

[filipinoguy]

I recently soldered the red servo wire to the red ESC wire to get better speed and strength. (someone advised that I do this to get better strength, so I did). But now the servo acts funny. It'll turn right when supposed to, but as soon as apply the throttle it'll turn left, with the transmitter still pointing right. Someone please help.:rolleyes:

[filipinoguy]

Also what would happen if I soldered the Black servo wire to the black ESC wire?

[LouisB]

Originally posted by filipinoguy
Also what would happen if I soldered the Black servo wire to the black ESC wire?

That would pump 7.2 volts and a couple of thousand milliamps into your servo when you accelerate, smokin'
(bad idea)

have you used a choke? I think KO makes them, when you use 7.2v then you must have choke to stop interference. They're pretty cheap anyway. I haven't done this to any of my servos so I'm no expert on the subject but I think a choke could solve the problem.

Try soldering the red servo wire to the battery (+ ve) too, are you using a reversable speedo?

[filipinoguy]

Whats a choke? Never heard of it. I don't want to solder anything to the battery, that'd be way too much work. Yes I am using a revesible ESC.

[filipinoguy]

Please someone help! Please.:(

[Ron Zee]

Don't know what you were told, but I would just get a servo that has more torque in it to begin with. There are lots of decently priced high torque servos out there without haveing to resort to messing around with wires.

[filipinoguy]

Does it have anything to do with soldering? I'm not shure I did the best job soldering my ESC wires to the Deans connectors. Some strands may not be making good contact. Does this matter?

Also I don't know If this matters but, with the deans, it showed that you were supposed to solder the positive wire of the female connector on the inside. That would be too hard for me to do so I just soldered it on the out side.

So do either of these things matter?

[filipinoguy]

Does anyone think they know what it is? I don't think its the transmitter because I tried another transmitter and it still had the problem. So what's going on here. Please help!:(

[Ron Zee]

Have you taken the wire from your servo that you solderd to the ESC off yet to see if it all works correctly or not?? If you have and it's still doing this odd stuff, I'd say it looks like you fried your receiver or your servo. Any time you start adding things to a radio system that wasn't there to start with is an invitation to trouble.

When you do get it sorted out, and everything is working ok again,, don't go adding things just because someone told you too.

That little red wire that comes out of some ESC's is for FET servos,, a special kind of servo that requires a lot of voltage. If the servo you hooked up to it isn't one of these types, then I'm afraid it looks to me that you fried it.

Disconnect the wire you added, you said you tried another transmitter, so now try another servo. If it continues, try another receiver. If it still goes on, try another ESC. I bet on of these three are now messed up. Go punch the guy who told you to do this in the head.:eek:

[filipinoguy]

Well i tried another servo and it seems like the problem is gone, however there's not enough strength or speed, so what do I do? If I tried soldering the red servo wire to the red ESC wire I might end up with the same problem.:( What do I do now?:confused:

[filipinoguy]

Should I buy a high torque servo? Anyone wanna suggest me a fairly cheap high torqe servo?:confused:

[Ron Zee]

Expert 517 cost me 20 bucks, still works fine in my T3 truck, Hitec makes a few, Hobbico 605 is another about 40 bucks, you'll just have to check out different places online or a hobby shop that carries such items,, not the kind in a mall that has all kinds of stuff in it,, you need a hobby shop that has R/C type things there. The kind of place that does know the difference between a touring car and an off road truck.

By the way,, what are you putting this thing in anyhow??? What makes you think that what you have is slow or not strong enough??

[filipinoguy]

(What's an expert 517) The servo is in my HPI Sprint. It started getting weak after my tamiya plugs burnt out. Then I switched to deans plugs, still weak, then I soldered the red servo wire to the red ESC wire and got plenty of strength and speed but it didn't ''listen.'' Then I just recently switched to a Kyosho servo and now its just slow again. Trust me, its slow. I can still drive it but I'd get killed If I tried to race or something.

[TOMC2002]

If you install a servo FET choke to the red + wire that goes to the speedo from your servo that should solve your problem also, i had the same problem and installing a power capacitor to the speedo stopped my servo doing this and it works great.

[filipinoguy]

Whats a servo FET choke? What do they do, and where can I get one?

[TOMC2002]

it looks abit like a capacitor you can get then either from your local hobby shop or an online shop i cant really help you there because i live in the UK, they help stop interferencehen using FET 7.2v servos. Also installing a power cap is a good idea as it will also help with punch. you can get them from electrical shops if you need more info please ask. Im sure it wont be a problem with your reciever or transmitter.

[filipinoguy]

Originally posted by TOMC2002
If you install a servo FET choke to the red + wire that goes to the speedo from your servo that should solve your problem also, i had the same problem and installing a power capacitor to the speedo stopped my servo doing this and it works great. So you installed a capacitator on your ESC and the problem was fixed? I intalled a capacitator on my ESC but it still has the problem. Looks like I'll have to get the choke thingy.

[TOMC2002]

Yes you will need a choke no matter if you have a power cap or not. im sure someone can help you out with where to get one from.

[filipinoguy]

So does anyone know where I can get this choke thing? Do they carry them at tower?

[filipinoguy]

Lets say I got a new servo, which one do you think I should get? The Futaba S3305 (http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXDWF8&P=7) or S3010 (http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXDTB3&P=7) . Remember this is going into an electric TC. The S3010 is a little faster, while the S3305 has more torqe, but is $10 more expensive.