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Author Topic: soldering to motor casing  (Read 1875 times)

lozvik

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soldering to motor casing
« on: August 01, 2009, 04:15:51 PM »

does anyone know how to solder capacitors to the motor casing? ive tried with my 25w iron but cant get the solder to stay put, ive tried rubbing the casing with emery cloth etc, i would imagine i cant get it hot enough with the soldering iron i have, what do u think guys.
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Colin Bishop

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Re: soldering to motor casing
« Reply #1 on: August 01, 2009, 04:29:17 PM »

This has recently been discussed on the Model Boats website, see here: http://www.modelboats.co.uk/forums/postings.asp?th=29927

Colin
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lozvik

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Re: soldering to motor casing
« Reply #2 on: August 01, 2009, 05:03:00 PM »

thankyou :-))
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Shipmate60

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Re: soldering to motor casing
« Reply #3 on: August 01, 2009, 05:12:26 PM »

Advertising Colin?   ;)

Bob
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DickyD

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Re: soldering to motor casing
« Reply #4 on: August 01, 2009, 05:20:09 PM »

You need a soldering iron nearer 50watts to make your life easier.

Maplins do a nice cheap solder station with variable temperature.

I got one a short while ago, excellent.

http://www.maplin.co.uk/Search.aspx?criteria=solder%20station&source=15
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Colin Bishop

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Re: soldering to motor casing
« Reply #5 on: August 01, 2009, 05:22:28 PM »

Quote
Advertising Colin? 

Not really Bob, there have been a couple of instances recently when Model Boats Forum enquirers have been referred to Mayhem for an answer. Not much point in repeating everything all over again.

Colin  ok2
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sheerline

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Re: soldering to motor casing
« Reply #6 on: August 01, 2009, 09:39:50 PM »

Just throwing my experience into the pot here as  I solder these things on, on a daily basis.

Wire the capacitors to the terminal post first.
Twist the remaining capatitor legs togeter and bring them over the side so they lay on the side of the motor casing.

Take a small needle file and file the plating off the case in the area you wish to solder to. Removal of the plating is important and it will be obvious when you are through to the steel casing.Apply a little flux paste to the metalwork.

Tin the legs of the capacitors and the exposed area of the motor casing and solder them onto the tinned casing.
Cut off the surplus capacitor wires to tidy up.

As has been pointed out, you will need a decent hot soldering iron, mine is a 48Watt and even with that, it needs to be running at full heat as the motor casing will sap the heat from the iron quickly so solder it immediately and do it quickly as you don't want to start heating up the plastic motor backplate (if yours has one).








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Colin Bishop

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Re: soldering to motor casing
« Reply #7 on: August 01, 2009, 09:41:44 PM »

Why not just introduce a solder tag to one of the motor mounting screws and attach the wire to that?
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sheerline

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Re: soldering to motor casing
« Reply #8 on: August 01, 2009, 09:50:37 PM »

Thats another option of course and certainly simpler for some applications. Personally I don't have the option so have to solder to the casing on my jobs but it's simple enough. It takes much longer to write about than actually do but then I'm used to it, like everything, it's easy when you know how and have experience.
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