Big mistake today

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  • Raydee
    Fast Electric Addict!
    • May 2007
    • 1603

    #1

    Big mistake today

    I received a Castle/Neu 1717 to put in my PT45 hull and I noticed the wires were very long. After going to Castle's website I read that is is ok to shorten the motor wires. I ended up cutting about 1.5" off the wires and to my suprise no solder will stick to the wires. It seems that the motor I got is the heli version and the wires are completely different than the car motors. Now I have to figure out how I can safely get the coating off the wires so that I can get them tinned. I have read about a dozen threads on the subject and it seems the only way that I can really get the coating off the wires is to scrape it off every strand. I was hoping there was some sort of solvent I can try or even acid that will eat the coating away and not harm the motor.
    Team Liquid Dash
  • BHChieftain
    Fast Electric Addict
    • Nov 2009
    • 1969

    #2
    Is there a way for you to open the can and install new wires? If not, maybe you could contact Neu to see if they'll do that for you.

    -Chief

    Comment

    • Raydee
      Fast Electric Addict!
      • May 2007
      • 1603

      #3
      Well I am sure Neu has a process of stripping the coating off the wires when they tin them. I sent them a email to see if they would share the process with me. If they can't I asked them if they would tin the wires for me.
      Team Liquid Dash

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      • m4a1usr
        Fast Electric Addict
        • Nov 2009
        • 2038

        #4
        Theres probably only one decent method of removing the coating off the wires and thats using an aspirin tablet. Yep. I said acetacylic acid. It will remove any and all shellac or varnish coating but you need to be carefull when using this method. The method involves heating up the tablet until it melts and then dip the wires into the melted goo. The problem is the melted tablet emits a very toxic gas so ventilation is extremely important. But it will remove any coating and then you will be able to solder away. Let me dig out the article I have saved and print it out so you understand all thats involved.

        John
        Change is the one Constant

        Comment

        • Basstronics
          Fast Electric Addict!
          • Jun 2008
          • 2345

          #5
          Did you try liquid soldering flux? not the paste junk...
          42" Osprey, 32" Pursuit, 26" Bling Rocket (rescue), Blizzard Rigger, JAE 21FE rigger, Hobby King rigger (RIP)

          Comment

          • Raydee
            Fast Electric Addict!
            • May 2007
            • 1603

            #6
            I can flux it all day long, nothing will stick as long as that coating is on the wire.

            John I tried that tonight but I wasn't sure exactly how to do it. It did stink real bad though. Let me know if you find that article.
            Team Liquid Dash

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            • MarkF
              dinogylipos.com
              • Mar 2008
              • 979

              #7
              You need to make a solder pot and get it over 400 Degrees. You can use an iron pot and put 60 40 solder in it and not the kind with rosen core. Heat it up with a propane torch and get it very hot. The coating wont melt untill you get it to the right temp. Then you dip the wire in and wait for the coating to melt off. Neu also has a special machine that can do it as well. I would send it to Neu if your not comfortable with the solder pot.

              Mark

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              • Raydee
                Fast Electric Addict!
                • May 2007
                • 1603

                #8
                Yeah I am sure Neu would have it done in no time. I am just not sure if they will work on the Castle motor since it is not their motor. They have always been great to me in the past so it is worth a shot.
                Team Liquid Dash

                Comment

                • m4a1usr
                  Fast Electric Addict
                  • Nov 2009
                  • 2038

                  #9
                  A solder pot may work but may not. When I was attempting to remove the coating from the wires on my SV27 motor a solder pot would not work. I fish so I have a serious lead pot. Bigger and hotter then most anyone has in their shop. I can get that bad boy up to 750 f. Wouldnt do nothing to the coating on the SV27 motor wires. Only when I tried the aspirin method could I get the coating off.

                  I cant find the article I have saved on my home computer. Must be on my work puter. The basic method is to place a tablet on a suitable surface that can be heated. Put your 80 watt soldering iron on top of the tablet and let it start melting it. Place the wire in the melted goo and let it heat up and react to the liquid. You will need to coat the wire up at least 1/4". A bit more is better. You must have very good ventilation. The gas coming off the melted tablet is very toxic. A fan blowing it away is the best method. I can post tomorrow with a reprint of what I have saved but the basics are right here now. Wish I would have sent it home.

                  John
                  Change is the one Constant

                  Comment

                  • RaceMechaniX
                    Fast Electric Addict!
                    • Sep 2007
                    • 2821

                    #10
                    I've got a professional wire brush stripper at work we use for stripping 22 AWG wire. I can give it a shot, but my guess is that it will not do a 100% complete job, but maybe better than anything else.



                    Tyler
                    Tyler Garrard
                    NAMBA 639/IMPBA 20525
                    T-Hydro @ 142.94mph former WR

                    Comment

                    • Raydee
                      Fast Electric Addict!
                      • May 2007
                      • 1603

                      #11
                      Thanks for the offer but Steve Neu emailed me last night and said he would help me out.
                      Team Liquid Dash

                      Comment

                      • LuckyDuc
                        Team Ducati Racing
                        • Dec 2008
                        • 989

                        #12
                        I just had the same thing happen with a UL-1 motor. Cut the wires just past the original bullet connector and solder won't stick. I should have just heated up the original connector and pulled it off.

                        Comment

                        • dasboata
                          Fast Electric Addict!
                          • Dec 2010
                          • 3152

                          #13
                          Originally posted by m4a1usr
                          Theres probably only one decent method of removing the coating off the wires and thats using an aspirin tablet. Yep. I said acetacylic acid. It will remove any and all shellac or varnish coating but you need to be carefull when using this method. The method involves heating up the tablet until it melts and then dip the wires into the melted goo. The problem is the melted tablet emits a very toxic gas so ventilation is extremely important. But it will remove any coating and then you will be able to solder away. Let me dig out the article I have saved and print it out so you understand all thats involved.

                          John
                          Live and learn never heard of this before what are they coated with and why thanks chris

                          Comment

                          • sailr
                            Fast Electric Addict!
                            • Nov 2007
                            • 6927

                            #14
                            Wow! Good to know! Guess I won't mess with any motor wires!
                            Mini Cat Racing USA
                            www.minicatracingusa.com

                            Comment

                            • keithbradley
                              Fast Electric Addict!
                              • Jul 2010
                              • 3663

                              #15
                              I think shortening those wires will also change the kv of the motor. Castle says the air version wires are NOT ok to shorten. They are part of the winding.
                              www.keithbradleyboats.com

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