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Old Oct 16, 2014, 05:02 PM
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United States, CO, Boulder
Joined Jun 2014
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Help!
Esc wires cut too short

Doing a first build. Not even going to say how it happened but the esc wires - (to the motors) got clipped too short. I mean they are down to the heat shrink on them. Not enough to really get a good splice.

I dug around some on this and from what I gathered, it's not advisable to solder new wires on to the esc? Outside of just getting a new esc, I'm wondering if it's feasible to fix this problem.

Thanks for any advice.
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Old Oct 16, 2014, 05:39 PM
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Canada, ON, London
Joined Mar 2013
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Cut the heat shrink off and have a look at where the wire is soldered to the esc before getting new ones. You have nothing to lose.
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Old Oct 16, 2014, 05:59 PM
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Ira NZ's Avatar
Upper Hutt, New Zealand
Joined Apr 2006
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Quote:
Originally Posted by stuartambient View Post
Doing a first build. Not even going to say how it happened but the esc wires - (to the motors) got clipped too short. I mean they are down to the heat shrink on them. Not enough to really get a good splice.

I dug around some on this and from what I gathered, it's not advisable to solder new wires on to the esc? Outside of just getting a new esc, I'm wondering if it's feasible to fix this problem.

Thanks for any advice.
Only issue with soldering new wires on to the ESC would be if you do a bad job of it. Bad joint, short something out, etc. Well, I suppose you could overheat it too. But if you don't do any of those, you'll be fine.
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Old Oct 16, 2014, 06:36 PM
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I don't know. My soldering skills leave something to be desired. Not sure how well the pictures show but the joints are between those chips. I'm assuming that are not soldered to the pins themselves. It's a tight squeeze. Hmmm
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Old Oct 16, 2014, 07:06 PM
Team WarpSquad
United States, PA, Doylestown
Joined Jan 2014
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The wires are soldered to a pad between the MOSFETs which do connect to all 4 pins of each MOSFET. This would be a pretty easy soldering job but will require a medium size iron.
Here is a good video on soldering ESCs. They are not exactly like yours but still worth watching.
Warpquad ESC Prep (5 min 33 sec)
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Old Oct 16, 2014, 07:22 PM
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Originally Posted by waltr View Post
The wires are soldered to a pad between the MOSFETs which do connect to all 4 pins of each MOSFET. This would be a pretty easy soldering job but will require a medium size iron.
Here is a good video on soldering ESCs. They are not exactly like yours but still worth watching.
Good video. Yeah, my iron isn't great. I was able to get the wires off fairly quickly, however a good portion of solder remains. It does look like some of the solder touches some of the pins on the sides of the mofset's. It's a pretty tight space as well Not sure if I should try and either use a solder sucker, or the wick to clean it up, or neither. I'd be tempted to try and reuse the solder that is already on there but that is probably not a great method.

It's a $10 esc, but I'd still like to try and save it. Even if it was a spare for the future.
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Old Oct 16, 2014, 08:06 PM
Team WarpSquad
United States, PA, Doylestown
Joined Jan 2014
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Try the solder wick. Be sure to pull a fresh part the the wick out of the roll and suck off the old soldered. Two reasons to do this:
1- it is probably No-lead solder which is harder to work with and do a good solder joint.
2- you want fresh solder and flux. So after the olde solder is cleaned off place a glob of fresh solder then solder the wires on.
Go for it as that is how you learn.
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Old Oct 16, 2014, 08:20 PM
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Sounds right. I'll be picking up some wick in the morning. Thanks for all the help. Will update when complete.
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Old Oct 21, 2014, 05:24 AM
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Question - When I put new heat shrink back on the esc, is it safe to use a heat gun?
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Old Oct 21, 2014, 08:13 AM
Team WarpSquad
United States, PA, Doylestown
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Originally Posted by stuartambient View Post
Question - When I put new heat shrink back on the esc, is it safe to use a heat gun?
Yes. I actually use a small torch to shrink to tubing.
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Old Oct 21, 2014, 08:02 PM
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Upper Hutt, New Zealand
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Originally Posted by stuartambient View Post
Question - When I put new heat shrink back on the esc, is it safe to use a heat gun?
Yeah, it's fine as long as you don't go crazy with the heatgun.
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Old Oct 22, 2014, 06:23 PM
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Guess my soldering job was a failure. Wicked the solder off pretty well from the pads, but the soldering part was difficult, mostly to my lack of experience and somewhat to a tight space. I did manage the connect the wires but it won't fire up so I'm thinking most likely I overheated the board or component on the board.

There was no smoke or anything from the esc. Just seems dead. Guess it is fairly easy to kill it with the iron.
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Old Oct 22, 2014, 06:44 PM
Team WarpSquad
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Well you did try and that counts.
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Old Oct 22, 2014, 07:13 PM
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Well you did try and that counts.
Yes, and now I have a dead board to practice on.
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