Changing connectors help

[Grumpy]

Yeah, you can just solder the ESC wire into the new bullet. The ESC wires aren't coated other than the external silicon insulation.

[CromedCm]

I don't like adapter cables, every solder joint and connector is a source of voltage drop and a potential failure point, i try to minimise the number I have.

All things being equal 6mm bullets would be the (slightly) prefered option as they are likely to have higher current rating and lower voltage drop than the 5mm ones, but having said that 5mm should be perfectly fine too, so just go with what you have available.

PS... if removing the bullets from the motor DO NOT cut them off. The motor winding wire has a tough lacquer coating, so if you cut off the pre-tinned wire ends it's the devil's own job to strip the coating off the wire. Just de-solder the existing connectors and re-solder the tinned ends in the new connectors.

So i have got another e700 and got another Nick Maxwell motor but this time i need to change the connectors on it. Last time i only changed the esc connectors to 6mm bullets, its been running perfect about 10 flights with the new motor on it.

I have all ready done the esc with the 6mm bullets and am now going to do the motor, but just want to be 100% sure i will do it correct. I have taken off the heat shrink from around the bullets and am wondering what would be the best way to de-solder the connectors. Should i use a point head on my soldering iron and push it right into the middle of the bullet or a flat head and put it on the side off the bullet?

[Tim Procter]

Conor.

The Nick Maxwell motor you bought from me has EC5 male bullets fitted to it (as have all my motors) so on the ESC use the matching female bullets from the EC5's.

When finished your soldering cover with heatshrink for total protection, job done.

[xygax]

soldering is all about getting it hot enough to make the solder flow properly if its not the alloying of the metals wont take place properly inside the joint and this can lead to a high resistance joint that will fail one day...

S

[Grumpy]

I have all ready done the esc with the 6mm bullets and am now going to do the motor, but just want to be 100% sure i will do it correct. I have taken off the heat shrink from around the bullets and am wondering what would be the best way to de-solder the connectors. Should i use a point head on my soldering iron and push it right into the middle of the bullet or a flat head and put it on the side off the bullet?

I'd use a the largest flat head that you have. Hold it on the side but make sure to have some solder on the iron and allow it to flow onto the connector so as to carry the heat into the connector far more effectively than just a dry metal to metal contact.

Or do as Tim suggested and just put EC's on the ESC.

[kenny d]

Soldering is all about flux , you'll already know that you have to get it hot enough for the solder to run , plenty of flux and it'll run so much better , the way I do my bullets is with a small butane lighter/ torch which only cost about £5 , I have a lump of wood with holes bored in it to take the bullets halfway in , heat the cup side & fill with solder , get it pretty hot then just put your pre tined wire with flux on it into it and the heat that's already in it will melt the solder on the wire and fuse , hold it till it cools , job done , I also have a 100w soldering iron that works well , I hold it on the side of the bullet with the pre tined wire in the cup & the heat transfers again dip your solder into the flux first & this will make it run well , for tinning your wire bip it into your flux then touch the soldering iron with solder already loaded on & it will tin instantly, Kd