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HomeAircraftHelicopterMain Discussion › Shortening servo leads!! Yes? No?
06-25-2014 04:06 PM  3 years agoPost 21
icanfly

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ontario

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and if you expect the wire coiling around a driver, rod, pen, or pencil to stay coiled it won't without heating it with a heat gun or similar hot air device. Let cool for 5 minutes before pulling the dowel out.

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06-25-2014 04:20 PM  3 years agoPost 22
rcflyerheli

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Granbury, TX USA

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When I was wiring a new heli I got at a fun fly, I decided to do the shortening. It worked out, but I found trying to get everything correct using the pin and crimp method very tedious. Everything has worked fine, but I don't know if I would do it again.

I wouldn't do the solder method on my wires.

Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
Amain Team Rep

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06-25-2014 04:49 PM  3 years agoPost 23
rudyy

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E. Amherst, NY

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If you are good in wiring, you can hide all the wires without shortening them.

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06-25-2014 07:48 PM  3 years agoPost 24
Paulieb1979

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brooklyn, new york

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jr servos
I thought jr released a servo that the wire plugs into the servo so you can buy diffrent lead sizes i know i saw it as a promo but have not heard of them since

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06-25-2014 11:20 PM  3 years agoPost 25
rexxigpilot

rrProfessor

Florida

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Look, I have shortened many servo leads. I have very expensive soldering equipment. So for me it is not that difficult. If you don't have or are unwilling to buy good soldering equipment and learn how to use it, don't even try to shorten leads.

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06-26-2014 12:47 AM  3 years agoPost 26
racemwyatt

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Oklahoma City

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I shorten my leads. I use the crimper and ends from Hansen hobbies. ( the forty dollar crimper!)

It's not difficult, with a little practice, you can't tell the difference between factory crimps and your crimps. Just take an old servo or extension and practice.

I've also soldered new leads to the servo to make them longer. The trick to soldering servo wires is a quality soldering station, not some cheap iron. I use the HAKKO FX-888. Best iron for the price, around 100 bucks.

Could you cause a problem from a bad crimp, maybe.
Could you cause a problem cramming wires in nooks and crannies, maybe.
Could you cause a problem coiling wires and allowing them to flop around, maybe.

I guess you have to pick your poison!!

To me, a neat and clean install is easier to troubleshoot and maintain.

I told my parents I wanted to be a pilot when I grew up, they said I can't do both!

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06-26-2014 02:36 AM  3 years agoPost 27
tauscnc

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Joliet IL

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I've shortened my leads for many different helis over many years (airplanes too). I'm a little wire OCD and my general goal is you should not be able to see any wires . Just remember you probably will not be able to sell it later as easily as someone may not want to trust your work.

Clean wiring is just as important especially on a smaller model like a 450. As said before you can do many different styles. I have found most newer servos have some type of silicone goo at the servo end so I generally just leave it alone now. Plus its harder to solder to the tiny spots then crimping for me.

I crimp new ends on, using a standard crimping tool from the hobby shop. I think its like $20. I don't feel you need a $100 crimper or $100 soldering iron to do the job. If you are careful and take a little time your work will be fine. A 25 watt radio shack iron is just fine or the $20 crimper.

I just shortened my leads on 2 of the servos on the 450L dominator...what I did find is align did not put any goo on the servo leads and the 3rd was already pulled out of the box. I crimped 2 of them and soldered one of them.... using a 25 watt radio shack iron -just like any iron keep the tip clean. I added liquid electric tape to the ends and let it dry overnight.

Many flights so far.

Good luck,

taus

PS. racemwyatt nice clean job

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06-26-2014 02:49 AM  3 years agoPost 28
RyanW

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Edmond, Oklahoma

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As recommended earlier, the HansenHobby deluxe kit is the way to go. I have been through the whole crimping thing from a hobbyist, professional in the industry and from a controls company that uses crimpers in the thousand dollar range. The deluxe crimper that Hansen sells is on par with the $400 Molex type hand held units. Seriously.

It is the only system I have used that I trust 100%. I have used them since 2008 and have had zero issues, zero failures and been 100% happy with the results and I am as picky as they get.

Also mentioned before- DO NOT mix and match pins and housings!!! Get the ones made for each other. This is important.

IF you decide to solder- don't do it at the pin. DO NOT do it at the pin. I repeat DO NOT Why? Unless you have some amazing strain relief at your receiver or FBL unit (where your servos plug into) you are begging for failure there. You want the wire as flexible as possible and simply tinning the wire will cause solder to run up the wire a certain amount and make it 'brittle'. The servo wire coming out of these devices typically makes a bend or radius and you are just begging for the wire to fail.

Crimp properly, solder on the board of the servo (internally and you can use the strain relief provided) or bundle the extra cable up. Those are the best options.

-Ryan
Mikado USA, Kontronik, Opti-Power, MKS Servos

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06-26-2014 10:11 AM  3 years agoPost 29
Mike0251

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Hills of the Blue Ridge VA

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Let me hit on the pins once more too. Use brand name pins as everyone else has stated! The after market pins DO NOT have the same insertion or contact force and do not make for a good connection.

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06-26-2014 03:55 PM  3 years agoPost 30
Jayl008

rrNovice

Kingsburg, CA USA

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I just ordered my Hansens Hobbies kit. Thank you guys for all your info. This definitely the right way to go.

...get that @&#$ upside down...

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06-26-2014 10:31 PM  3 years agoPost 31
Andy from Sandy

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Bedfordshire, UK

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Ryan got there first.
Cutting out the middle and splicing, then covering with heat shrink would be my last resort.
It shouldn't even be a considered thought. As per Ryan's post.

I don't shorten leads but I did purchase the Hansen hobbies kit for making extension leads. The 22AWG wire I bought doesn't stay together so well and easily separates but it does make for nice soft pliable leads.

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06-30-2014 04:50 AM  3 years agoPost 32
Flys4Fun

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new mexico

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wow, soldering wires and crimping has never seemed like such a monumental task until this thread, lol everyone in rc helis are soldering on main batts, becs ect ect which power the entire heli and i dont see helis falling out the sky in record numbers, crimping and soldering is not that hard, watch a youtube vid and learn lol.

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06-30-2014 02:24 PM  3 years agoPost 33
icanfly

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ontario

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don't do it at the pin. DO NOT do it at the pin. I repeat DO NOT Why? Unless you have some amazing strain relief
I do it to ALL my pins because I trust a solid bond over crimping alone. You tug on these pins when you remove the plug. The trick is to only allow the smallest amount of solder to creep onto the wire when soldering at the pins. The solder is not allowed to creep up to where the jacket begins, the part of the jacket that is needed for the last crimp of the pin before it exits the plug case. I also find TWISTING the exposed wire tightly before adding solder keeps them consolidated and makes it easier to keep them in a tight form. We're talking twisting the single multi strand wire of each color jacket. My soldering iron is an pencil tip iron and the solder wire is .030 about, very tiny. A bit of practice is in order to do the pins so you'll be able to slip them in the plug without a prob. I use a super small screw driver to push the pins in the plug if they are stubborn.

On a 250, 300, 400, 450, excess wire can really be a disgusting mess. I'm ocd to the point that on my 300 a wire from the tail servo is only a wee bit over an inch long because it is right beside the gyro where it plugs in. I have a chance to half length the wires on my shuttle because the gyro is directly beneath the servos.

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06-30-2014 06:00 PM  3 years agoPost 34
Glenn Goodlett

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California

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I've shortened servo wires by soldering at the servo, splicing the wire, and crimping a new plug. I've never had any of them fail. Lately I have opted for crimping since its easy and elegant. Do whatever you want or nothing at all.

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06-30-2014 06:35 PM  3 years agoPost 35
rexxigpilot

rrProfessor

Florida

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Sadly, the building skills of the typical RC modeler have been seriously diminished since the advent of the ARF. Those of us who used to build from scratch back in the day have no trouble soldering and crimping. That said, I have seen some horrific soldering jobs by many on my fellow RC club members. I would not feel safe at the field knowing they did their own soldering or crimping. For them it is best to simply wind and tie-up the excess wire.

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06-30-2014 07:16 PM  3 years agoPost 36
MartyH

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USA

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I would either shorten the lead external of the servo by sectioning the lead, or shorten the lead and install new pins. That of course would be the most professional looking. I know my way around electronics and soldering but I'm not going to open the servos and potentially cause a mess.

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06-30-2014 07:43 PM  3 years agoPost 37
Jerry K

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Houston Area

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Only one question WHY? What would shortening them serve? Will it make them more reliable? If not you are wasting your time!!!

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06-30-2014 09:26 PM  3 years agoPost 38
RyanW

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Edmond, Oklahoma

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So your installation can look like this...

-Ryan
Mikado USA, Kontronik, Opti-Power, MKS Servos

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06-30-2014 10:38 PM  3 years agoPost 39
Cowjock

rrVeteran

Pa.

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wow, soldering wires and crimping has never seemed like such a monumental task until this thread
Ain't that the truth.

Damn that ground is hard! When's the right time to get out of this money sucking hobby?

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07-01-2014 04:20 PM  3 years agoPost 40
kavic5150

rrNovice

Maryland, USA

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Feel free to cringe but I also use a 25 dollar radio shack soldering iron and crimp my JST connectors carefully with a standard pair of pliers. Works most of the time the first try.

Just bookmarked those Hanson hobbies crimpers and that Hakko soldering station. I could use an upgrade at some point. Thanks guys.

"Life is short, get the good can opener." -Adam Carolla

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HomeAircraftHelicopterMain Discussion › Shortening servo leads!! Yes? No?
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