Soldering suppressors to the motor

Advert

New Replies

Report Bug

Help/FAQs

Soldering suppressors to the motor

This topic is empty.

Viewing 17 posts - 1 through 17 (of 17 total)

Author

Posts
16 July 2009 at 19:00 #22043
Paul Godfrey
Participant
@paulgodfrey14946
Hi folks

Having a bit of a problem with soldering RFI Suppressors to my motor.

No problem with the terminals, but struggling with the motor casing which acts as a big heat sink, and is difficult therefore to get sufficient heat for the solder to ‘take’. My soldering iron is 30w.

Any advice would be much appreciated.

Paul

Edited By Paul Godfrey on 16/07/2009 19:00:23
Advert

16 July 2009 at 19:00 #1889
Paul Godfrey
Participant
@paulgodfrey14946
16 July 2009 at 21:32 #22044
Tony Hadley
Participant
@tonyhadley
Paul,

A common problem, as it is difficult to heat the motor casing.

I use a simple cable tie, or alternative binding, as a mechanical fixing method. Some use a jubilee clip.

Hope this helps,

Tony.

Edited By Tony Hadley on 16/07/2009 21:32:47
17 July 2009 at 08:20 #22048
Barry Foote
Participant
@barryfoote68385
Try roughing up the casing with a file where you want to solder to. This concentrates the heat somewhat and helps the solder stick.
17 July 2009 at 17:46 #22061
Paul Godfrey
Participant
@paulgodfrey14946
Thanks for your comments guys, much appreciated.

I’ll give the casing a roughen-up and try this first, but if I still have problems, the Jubilee clip/cable tie idea sounds a very good solution.

Paul
17 July 2009 at 18:37 #22062
Colin Bishop
Moderator
@colinbishop34627
Another possibility, depending on the motor is to use a small solder tag where the mounting screw screws into the front of the motor.

Colin
17 July 2009 at 19:24 #22067
ashley needham
Participant
@ashleyneedham69188
I use a large powerful soldering iron, and gently buff up the patch to be soldered with fine wire wool in order to clean it (but dont rub the plating off) I also use some soldering fluid/flux and a non-cored solder. So saying, some motors just dont seem to want to be soldered to! If you are using a standard L shaped motor mount, and screws the easiest way would be to use the screws as terminals and attatch the wires to them. Ashley
17 July 2009 at 19:24 #22068
ashley needham
Participant
@ashleyneedham69188
whoops.. repeating Colins suggestion !!
17 July 2009 at 22:05 #22072
Colin Bishop
Moderator
@colinbishop34627
Glad you noticed Ashley!

Great minds think alike.

Colin
17 July 2009 at 22:37 #22075
Paul Godfrey
Participant
@paulgodfrey14946
Thanks all.

Ashley – what wattage is the iron you use?

Paul
17 July 2009 at 22:55 #22076
Phil Abbott
Participant
@philabbott79958
The other way which also works for soldering onto tags on batteries (as you don’t want to keep to much heat going into a battery) is the method I use. Take a piece of steel about 1/4 inch square and at least 6in long (although any steel stick would do)

Heat to bright cherry red with a blow torch (hold metal with pliers !!!) you now have a very hot soldering tip (hotter than any iron can get to) and use this to solder to the motor casing. You will find you only have to touch it, as it is very hot, the casing doesn’t really have time to work as a heat sink.
18 July 2009 at 01:05 #22079
Peter Fitness
Participant
@peterfitness34857
I use a 60 watt iron – quickly, having first buffed the area as described by Ashley.

Peter.
18 July 2009 at 07:44 #22083
Paul T
Participant
@pault84577
I find that a gas torch works very well for soldering on to larger motor cans.

It puts lots of heat in a small area very fast and is ideal for spot soldering on motor cans.

Paul
18 July 2009 at 18:22 #22090
Paul Godfrey
Participant
@paulgodfrey14946
Thanks guys.

I’ve managed to get the job done, using a combination of the methods suggested.

I didn’t have a steel bar to heat up, so used a 6 inch nail, which allowed the solder to partially take to the casing. I then used my blow torch (unfortunately I dont have one with a fine flame like TFC – not yet, anyway!), a quick blast was all it took to finish the job off.

Thanks again to everyone who’s kindly given advice.

Paul
18 July 2009 at 21:27 #22096
ashley needham
Participant
@ashleyneedham69188
No idea watt (!) wattage my iron is, its got a great bit 1″ wide tip though! Ashley
19 July 2009 at 06:41 #22099
Paul T
Participant
@pault84577
Hi Paul

Have a look on fleabay……you can pick up a new fine torch for £2.00.

Paul
19 July 2009 at 21:15 #22119
Paul Godfrey
Participant
@paulgodfrey14946
Thanks Paul

Had no idea they could be picked up for that sort of price.

Paul
Author

Posts