Crazyfile motor not working

[lordofllamas]

Hello! I was assembling the crazyflie. Even though all four motors were activated, it never took off. I realized the propellers were upside down, and I switched three right side up. One was especially stubborn, and I couldn't get it off. I ended up taking the wires off the motor instead. I pulled the soldered wires off and I fixed a new motor on, but I had difficulty soldering. When I ran the test, that motor (motor four) wasn't working. I soldered a bit more to make sure there were no loose connections and it still didn't work.

Thanks.

[lordofllamas]

PS. Any replies can go here or at my email (preferably).
demoylan@gmail.com (copy, don't follow the link)

[chad]

It sounds like there might be a solder bridge somewhere... Can you post a close-up picture of the solder connections for further diagnosis?

[lordofllamas]

Hi Chad!

Here's the image.

[img]
https://mail.google.com/mail/u/0/?ui=2& ... w1269-h539
[/img]

The problem is at motor four, the circuit has a lot of burns and the transistor to the right is burned a bit.

Thanks.

[lordofllamas]

I just want to say, out of 45 people viewing this, THERE'S NO REPLIES!

I would rather hear my crazyflie is hopeless and get a new one than constantly wait on this form.

Thanks for the answers.

[arnaud]

Hi lordofllamas,

The link to the photo is dead, maybe you can upload it to the forum?

[lordofllamas]

It's working fine for me...

EDIT: I saved it and put it up here.

EDIT: The bottom one is motor 4, all the others work.

[tobias]

I'm guessing there is a short around M4 soldering. I would start by cleaning it up with a cotton swab and some alcohol (isopropyl, IPA, is often preferred). Then in this thread there are some posts about testing for shorts and such. Tell us how it goes.

[lordofllamas]

Hello!
Thanks for a HELPFUL answer. Although, I think you tried to attach a link and it isn't working. I tried looking up the thing in the url and it didn't work. Can you re post it?

[tobias]

Oops, I've updated the link in the post above.