Solved Power Pack B / ESC Issue - Melted Wire

[FL-Hawkeye]

I'm working on my first Flight Test build, a simple cub. The build is going well except I had a problem with the ESC while testing motor rotation.

I'm using the same servo tester Josh used in his build video. I'm pretty certain I hooked it up exactly like he did [turns out not true, see posts below]. Below is a picture of how I had it hooked up (the battery/ESC cable is not connected in the photo, but was connected when the wire melted).

When I connected the battery to the ESC, the one of the ESC wires that goes to the receiver (in this case the servo tester) melted.

What could have caused this? If somehow I connected the ESC receiver wires to the server tester backward (putting the signal wire on negative) could that have been the problem?

The ESC still beeps when I connect power to it.

The servo tester works fine, I tested with a servo before and after the incident.

Thoughts on what caused the smoked wire? Since the ESC still beeps with power connected, maybe it will still work after I replace the smoked wire?

Thanks in advance for your replies.

Mark

 

[Matagami Designs]

I'm working on my first Flight Test build, a simple cub. The build is going well except I had a problem with the ESC while testing motor rotation.

I'm using the same servo tester Josh used in his build video. I'm pretty certain I hooked it up exactly like he did. Below is a picture of how I had it hooked up (the battery/ESC cable is not connected in the photo, but was connected when the wire melted).

When I connected the battery to the ESC, the one of the ESC wires that goes to the receiver (in this case the servo tester) melted.

What could have caused this? If somehow I connected the ESC receiver wires to the server tester backward (putting the signal wire on negative) could that have been the problem?

The ESC still beeps when I connect power to it.

The servo tester works fine, I tested with a servo before and after the incident.

Thoughts on what caused the smoked wire? Since the ESC still beeps with power connected, maybe it will still work after I replace the smoked wire?

Thanks in advance for your replies.

Mark

View attachment 182817

Short circuit on the ground wire. I have never put the balance charging leads to a servo tester like this appears. You should only need to connect the battery to the esc power through xt60. The esc will then provide power to the servo tester which can be used to check your motor. I'm not sure what harm you may have caused to the electronics though.

 

[FL-Hawkeye]

Short circuit on the ground wire. I have never put the balance charging leads to a servo tester like this appears. You should only need to connect the battery to the esc power through xt60. The esc will then provide power to the servo tester which can be used to check your motor. I'm not sure what harm you may have caused to the electronics though.

Thats it!

I used the balance leads to put one battery cell on the servo tester for power. That works for servo testing. I did not realize that the ESC would power the servo tester when connected. I re-watched Josh's video and confirmed that he did not connect any separate power to the servo tester when testing the motor.

Thanks,

Mark

 

[The Hangar]

Thats it!

I used the balance leads to put one battery cell on the servo tester for power. That works for servo testing. I did not realize that the ESC would power the servo tester when connected. I re-watched Josh's video and confirmed that he did not connect any separate power to the servo tester.

Thanks,

Mark

That got me the first time as well. Thankfully I didn’t ruin anything though, as I heard of people showing their esc’s by plugging a battery into the esc and servo tester.

 

[FL-Hawkeye]

There is some good news. Replaced the wire I melted and everything works as it should.