Fc problem

[kindred folio]

Ive been building a new 3,5” freestyle quad and ive had a little problem
No matter how i try i can get my soldering wire to stick to the pad
There are 2 pads which have this problem and i have no clue how to fix it
The main problem is that the soldering wire doesnt stick to the pad and also somewhy doesnt melt but when i try a different pad it works

Thoese 2 pads are the bad ones

The soldering wires on thoese pads dont melt but instead turn dry

[daring kite]

what temp, what solder and are you using flux?

[kindred folio]

Usin lux

Flux*

tried different temps

And different types of solder

But mainly using a 0.8 mm one

[daring kite]

which types?

[kindred folio]

I dont know

I know the thickness

The solder has worked before

On the same fc and some whoops

So ive used this for a while

[daring kite]

and what temperature?

[kindred folio]

Tried from 200-450

[daring kite]

i would use 330 for something like this.
get some good 63/37 flux core solder from like tbs or mgchemicals and make sure the tip of your iron is clean and shiny

[kindred folio]

Imma try then

Thx

[ashen yoke]

throughly clean the board with some iso alcohol, get some good flux down on the board, then solder.

had same issue on my mini speedybee board

Saw that in the pic, why I chimed in

[kindred folio]

I realized after i wrote the message

Ive not cleaned it before

But i used flux

[ashen yoke]

Yes, needed

[kindred folio]

Maybe too much

But not in the beginning

[ashen yoke]

Got to clean all that flux off

Iso Alcohol, 95% or better, small dental brush, small fan.

Get to scrubbing, make it all shiney. With the Iso over 95% won't leave residue, you can soak the board down. It will remove any coating on the board that may be there for waterproofing.

Sometimes this coating ends up on the contacts during manufacturing; then it won't adhear properly when trying to solder

[kindred folio]

Imma solder im the morning

Im too tired for ts

But thanks for the tip

[ashen yoke]

Ground still has a little wire there, when your ready to flux and solder can clean this up

[kindred folio]

Thats not the problem

That works perfectly fine

[ashen yoke]

This area, wow

[kindred folio]

Yep

Thats it

The batt and 9v

I dont need batt

Just accidentally got solder on it

[ashen yoke]

get enough flux across the entire area down there

then lightly tap each pad with fresh solder

[kindred folio]

The problem is with the 9v and ground

Should i take off the solder?

[ashen yoke]

no

hit me up on DM

So we can do some 1 on 1

not blowing up this forum

[daring kite]

this is literally what this thread is for?

[ashen yoke]

true

Let me get some pics together

I'm a visual guy, LOL

[ashen yoke]

Here i laid down 2 good starts, and then messed up the other side on purpose, no flux there on the right 3.

Clean it really well

Let dry

Apply a lot of flux where its messed up

Just tap on top of each pad just long enough for it to reflow, will bead back up once you lift the iron straight up.

Clean again, and ready for wires!!