Help with ESC and Brushless motor
 

Would someone be willing to have an email discussion of battery, ESC, motor and servo tester assembly.

Please.

I have already posted this on many forums. No bites. I just have some specific questions that are probably pretty simple and don't want to clog up a forum.

[email protected]

Feel free to ask your question out in the open. The community is always willing to help.

Yes, ask here. Even simple questions and answers can be interesting and useful to a large number of people!

OK. Here goes. I am building an "outlaw" pinewood derby car for a leaders race. I am going to use a ducted fan. Powered with a 7.4 2s lipo. Originally I had a 30A esc and was using a servo tester to supply the signal to the ESC to spin the motor.

It had worked. But now it does not. When I power it up, I get the "do do do" tone (progressively higher pitched). Then 2 short beeps (2s lipo). Then one long beep.

But when I turn the dial on the tester, the motor just jerks a little and does not spin like it used to.

Here's the components:

Holy Stone 2-In-1 Battery Charger and 2Pcs 7.4V 2000mAh Rechargeable Li-Po RC Drone Batteries for HS300,HS400

YKS RC Servo Tester Multi 3CH ECS Consistency Speed Controler Power Channels CCPM Meter with Reverse Connection Protection

uxcell 30mm 6 Blades Ducted Fan EDF Unit Jet Engine with 7000KV Brushless Motor for RC Airplane

RioRand 30A Brushless Motor Speed Controller RC BEC ESC


So. What went wrong? Did I over heat the ESC?

I bought a different motor:

uxcell 64mm 5 Blades Ducted Fan EDF Unit Jet Engine with 4500KV 3S RC Brushless Motor for RC Airplane

That did not help. YES, I know these are cheap parts. But I only need them to last a little bit. I have a couple of cheap 40a ESC's on order to see if that helps.

I am open to all thoughts on the problem.

Thanks.

It sounds like the ESC is dead, so you are on the right path.

Have you checked the voltage going into the servo tester? They are only rated to 6V and will cook easy with too much voltage.

I have not. No voltage tester. I also thought about figuring out how to tell how many amps the motor draws.

Would the tester still light up if I fried that?

Yes, the ones we have seen that were fried did still light up. You can get an inline current meter to check actual current draw, they are incredibly handy for see actual current draw on your system.

The new 40A esc works good. Does not get near as hot as the 30a esc did.

Hoping this one does not fry.

Digression: man, there is tons to learn about this stuff. Very fun. My wife will not be happy if I found another rabbit hole to go down.