Superluminal 3750 Posted August 2, 2020 Today has been a terrible day. Im working on a F103GT project which has been cursed from the day I won the auction for it. Literally everything I do to it or parts i order for it turns to crud. And I hate soldering. Mostly because Im so terrible at it. Today has been mostly spent soldering, resoldering, cutting, soldering again and its all basically been a waste of time. The quickrun esc and brushless motor combo i had has 12awg wires on it and i needed to extend them. I imagine using an arc welder would be more suitable, theyre like working with rebar. The 3 pin connectors i bought seem to be made of a plastic that has a lower melting point than the solder so lots of them were wasted. After about four hours i had assembled something approaching a way of connecting the esc to the motor. But no. The connectors on the motor point outwards so the wires when connected clash with wheel and are too high for the body to sit on the chassis. So i need to reverse them so they face the other way towards the front of the motor. So i tried melting them off with my soldering iron. Nothing. The solder doesnt melt. No idea how the connectors are held on but it wont melt and after a few minutes of applying the iron to it it just seemed to soften the pcb board they are fixed to. So no doubt ive probably knackered the motor too now. Is it possible to do this? Share this post Link to post Share on other sites
Wongataa 42 Posted August 3, 2020 I've done what you wanted to one of these motors. I couldn't use a soldering iron to get the connectors out either. I ended up drilling them out. Then I could solder new connectors onto the motor in the orientation I wanted. The motor works just fine. 1 Share this post Link to post Share on other sites
Superluminal 3750 Posted August 3, 2020 I was thinking of that as a last resort!!! Thank you - will try that tonight. Glad to here it was ok. What connectors did you fit back in or did you solder on the wires directly? No idea what they are held in with but it isnt regular solder. Share this post Link to post Share on other sites
Howards 456 Posted August 3, 2020 You could also consider soldiering directly on to the existing connectors with the wires in a reverse orientation if workable. Just tin them with a dollop of solder first. If you need to be able to unplug the motor put the bullets inline between the motor and speedo. Share this post Link to post Share on other sites
Wongataa 42 Posted August 3, 2020 I soldered bullet connectors onto the motor - basically just like what it came with, just pointing the other way. Share this post Link to post Share on other sites
Superluminal 3750 Posted August 3, 2020 10 minutes ago, Howards said: You could also consider soldiering directly on to the existing connectors with the wires in a reverse orientation if workable. Just tin them with a dollop of solder first. If you need to be able to unplug the motor put the bullets inline between the motor and speedo. Unfortunately the existing connectors clash with the body shell in their current location. Theres not a great deal of clearance over the motor pod part of the chassis. Share this post Link to post Share on other sites
Superluminal 3750 Posted August 3, 2020 8 minutes ago, Wongataa said: I soldered bullet connectors onto the motor - basically just like what it came with, just pointing the other way. Did the type of bullets you get have a pin on the back of them to locate in the hole? The bullets i have only have a dimple for the wire to sit in. Share this post Link to post Share on other sites
Wongataa 42 Posted August 3, 2020 I can't remember to be honest. Share this post Link to post Share on other sites
Superluminal 3750 Posted August 3, 2020 Spose I could just fill the dimple with a blob of solder and melt it into the hole Share this post Link to post Share on other sites
Yonzariq 114 Posted August 3, 2020 I had the same with my Xerun motor, then someone gave me the tip to first add more solder to the existing connectors and heat it up. That did the job for me and I was able to remove the connectors. Share this post Link to post Share on other sites
Lee76 638 Posted August 3, 2020 1 hour ago, Wongataa said: I've done what you wanted to one of these motors. I couldn't use a soldering iron to get the connectors out either. I ended up drilling them out. Then I could solder new connectors onto the motor in the orientation I wanted. The motor works just fine. I was going to suggest drilling these out too. If it were my motor design I’d have swaged or crimped the pins in place so they get some mechanical strength, so even if you were to remove all the solder you might find they don’t come out. I looked at a couple of other motors trying to find details of this and rather than solder they have resin potting on the back side, which might support the sewage theory.. Share this post Link to post Share on other sites
toyolien 4680 Posted August 3, 2020 I managed to do mine on my Frog build. I used a 120w soldering iron. I also added some flux to the joint to help with the heat transfer. Came off fine. 1 Share this post Link to post Share on other sites
Superluminal 3750 Posted August 3, 2020 120w!!!!!!!!!!!! Share this post Link to post Share on other sites
Superluminal 3750 Posted August 3, 2020 Mine soldering iron is 25w. So are they held on with a high temp solder? What you have done is exactly what i need. Share this post Link to post Share on other sites
sosidge 624 Posted August 3, 2020 1 hour ago, Superluminal said: Mine soldering iron is 25w. So are they held on with a high temp solder? What you have done is exactly what i need. It will be an industrial lead free solder. Your 25w iron won't be able to come close to the power required to do that job. So all you will end up doing is soaking heat through the whole board rather than melting the solder. It doesn't help that the bullet connetors are very good heatsinks themselves! Share this post Link to post Share on other sites
Superluminal 3750 Posted August 3, 2020 3 minutes ago, sosidge said: It will be an industrial lead free solder. Your 25w iron won't be able to come close to the power required to do that job. So all you will end up doing is soaking heat through the whole board rather than melting the solder. It doesn't help that the bullet connetors are very good heatsinks themselves! Drilling them out looks like the only option then if my maplins special is too puny. Quick look on ebay seems that soldering irons over 100w are serious wedge. Cant really justify that. Also, you have the best username ive ever seen by far! Share this post Link to post Share on other sites