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Old 08-14-2009, 10:54 PM   #1
Dan
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Default Tips for soldering motor?

Trying to solder up a Tekin motor. Managed to get 2 of the 3 wires on. However, the last tab is being really stubborn. Solder just doesn't seem to want to stick on it.

I've tried sanding the tab, using a bit of flux, but the solder joint keeps breaking off or doesn't stick at all. Tips anyone?
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Old 08-14-2009, 11:10 PM   #2
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I know this may seem like a silly suggestion, but did you let the tip rest between attempts so that it builds as much heat as possible?
Whenever I get a troublesome joint I always clean the tip very well and start with a fresh jolt of solder too.
Your best bet will likely be to start fresh all over. Clean as much as you can off the tab and sand it clean, clean the tip, let it build up heat for a few moments, and Ill assume you have the wires tinned well, but a fresh shot will surely not hurt them either.
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Old 08-14-2009, 11:23 PM   #3
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I avoided trying to leave the tip on there long as I did with soldering my ESC. But I guess the motor can take it versus circuit boards, so I'll give it a shot with leaving heat on there longer. Thanks!
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Old 08-14-2009, 11:51 PM   #4
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My guess is that you are using some crappy lead free solder. Nothing beats soldering with a nice 60/40 rosin core solder.
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Old 08-15-2009, 12:14 AM   #5
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Quote:
Originally Posted by Cpt.America View Post
My guess is that you are using some crappy lead free solder. Nothing beats soldering with a nice 60/40 rosin core solder.
Using leaded. I'm glad I have a pounds worth left. Should last for the rest of my RC career.

At my old job, we always had issues with lead-free solder.
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Old 08-15-2009, 12:20 AM   #6
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The motor can take a bit more heat than the ESC, but thats not really what I meant. I was talking about letting the iron sit untouched for a minute before moving on to the next wire. Unless you have a super iron it will lose some heat each time you solder a joint, allowing it to rest between joints can help sometimes.
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Old 08-15-2009, 01:03 AM   #7
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Clean the contact with some electric motor cleaner. Then use a flux pen on the contact. That will help the soldering if there is contamination.


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