Hi,
I got a problem, perhaps somebody is able to help me. I made the following configuration:
In this configuration only motor 1 is running. When I disconnect the lower power supply motor 2 is running. Why is this happening? I use 4s batteries, 20A ESC Model 30020 and A-2830/12 motors.
Thank you for any response,
Gerd
Replies
Hi Gerd
you have 3 power sources, The Lipos and the 2 ECS
They do not always share the same ground (-) wire.
your high power wiring is correct.
in your diagram it states the + and ground are interrupted for the top ECS, this is not correct.
Your receiver and Y adapter are correct, ECS 2 (bottom one) is correct, The ESC provides 5V (+) and (-) TO the receiver and references the signal FROM the receiver to the ECS against the (-)
ECS 1 (Top) needs the only the ground (-) and signal from the Y-harness to the ESC, do NOT connect the 5V. (+). if you connect the 2 (+)s together they will fight each other and the system will not operate.
I have several aircraft connected in this way and they all work great.
have fun.
Hi Dwgsparky,
I found the origin of the problem. My ESC were not calibrated but I didn't expect a huge difference among them, but once playing around with the gas stick the second motor suddenly starts to run. I had to move the gas stick half way to full speed until it starts. Now I calibrated all my ESC and all my ESC were running with the exact diagram shown above. So connecting the ground from the second ESC is not necessary and even has the risk to create ground loops because I got 16 ESC working together.
Thank you very much for your help,
Gerd
Gerd,
Glad to hear you got this sorted out. I too recommend that the ground be connected. Sorry I didn't think to recommend that you check calibration- I guess I thought you had done that. Me thinks ground loops are a bit too overrated, but this is coming from an old TV repairman!
Best Wishes,
Joe
"The simple answer is often the correct answer."
Double check the cables. It's easy to make simple mistakes.
Test run one engine at a time.
Hi Dwgsparky,
The two esc grounds are connected by the connection of the grounds of the power supply as you can see at the graphic above.
Have you tried connecting the Ground signal wire to the #1 ESC as well?
Yes I tried it but it had no effect as I expected.
Thank you very much for your reply.
Gerd,
Well this has me stumped as well. As your ESC's have a BEC I thought that lacking a Signal ground was the problem, i.e. no signal path to/from the ESC from the Rx. I will be watching this thread as now I am courious as to the reason.
Also where did you get the spiffy graphices that you used in your diagram- that would be helpful in many questions/responses to this site to see such as clear repeesnentaion of connictions.
How did you produce the diagram-- Powerpoint- something else?
Good luck and sorry I couldn't help.
Joe B.
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