Calibrating ESC

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Kevin Vertucio August 9, 2010 at 5:25am

Thanks, this fixed my problem too. Was frustrated for two weeks. I tried changing this before but not further than 900.
Scott Quartochi August 3, 2010 at 6:08pm

Ok, I think I have it. it might not be the right way but it worked for me. I had to change the following:

#define MIN_THROTTLE 670

and

if (ch_yaw > 1800) {
motorArmed = 1;
minThrottle = 970;
Developer

Sandro Benigno August 3, 2010 at 5:15pm

Hey Scott! If I understand your question... Like Michael said all you need to do is:

1 - power up you TX and move throttle stick all up (max)
2 - connect your ESC on RX and so power it up with a Lipo battery
3 - you will hear something like a "Teletubies" music beeps
4 - set throttle stick down (min) to save the setup
5 - you will hear another beeps tone
6 - you can power it down and it's OK

Regards
Developer

Michael Smith August 3, 2010 at 4:50pm

When you say "cal your ESC", are you referring to teaching the ESC the endpoints as output by APM?

Assuming the TP ESC you're using is one of the Hobbywing designs where you power up at max throttle, then go to minimum to set the endpoint calibration, have you considered getting your hands on a servo tester and going the other way?

The GWS servo tester is cheap and can be used to both generate and measure servo pulse widths. Use the tester to set a sensible range (e.g. 1000 to 2000) and then configure APM to suit...
Scott Quartochi August 3, 2010 at 4:47pm

Do I have to match the output of the APM to what I get from the APM?
Scott Quartochi August 3, 2010 at 4:34pm

Thanks guys, I am having problems configuring the ESC's. I did it directly connected to my RX. then connect it to the APM and all I get is cal mode cant make any changes.

TowerPro w25A Brushless Speed Controller
Developer

Michael Smith August 3, 2010 at 3:24pm

I'm not sure that I'd recommend it, but I've had no trouble with USB and 5V from a bench supply simultaneously.

USB alone doesn't seem to be enough to power a couple of servos when tinkering on the bench...
Jimmy P. August 3, 2010 at 11:43am

If you desolder sj1, you can use 2 different power sources. 1, a 5v power source and the other is usually your LiPo battery.
What you may need is a BEC so that you can use the battery to power two different sources w/ just the LiPo battery.
In the case of 1 source, you would have the sj1 joint closed. If you want to use 2 sources, leave sj1 open.

That being said, I have also powered the APM by removing the V+ pin from my throttle cable in both the in and out locations (the 3rd channel in my case) and then hooking up a 5V source (usb) to power the receiver and the board while leaving the battery to power the motor and ESC. In this case, the motor is still hooked up to the GND and Signal pin of the APM.

http://battery.In/
Scott Quartochi August 3, 2010 at 8:56am

I have seen several times not to connect the usb and esc at the same time. But if jumper sj1 is open, then it should be ok right?

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Calibrating ESC

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