Larry Grimm
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  • Deland, FL
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Why are motors not getting full power from arducopter

Started this discussion. Last reply by Philip Johansson Dec 5, 2014. 54 Replies

Arducopter is limiting the total power output of my hexacopter to 37 amps when it has the potential for 66amps when at full throttle.I bench tested many different motor and prop combinations to see…Continue

Tags: limited throttle, throttle trim, thrust test, more power, low power

6 Flight Modes Futaba 7C and Arducopter

Started this discussion. Last reply by Rick Jan 4, 2013. 1 Reply

How to program 6 flight modes into the Futaba 7C using Switch E for channel 5 and Switch A with a program mix with an offsetPIP video with Mission Planner on the Flight Modes Page and the Futaba T7C…Continue

Tags: turnigy 550 hexacopter, h550, hexacopter<, , futaba, 7c", futaba7c

APM 2.5 Arducopter is awesome Go for it! Its not as hard as it looks.

Started this discussion. Last reply by Anwar Aziz Apr 17. 14 Replies

I set up my first  Arducopter APM 2.5 last week and had it flying in 6 flight modes by the next day.i put it on a 550 hex that i built a week ago with a kk2 controller on it. My only experience with…Continue

Tags: turnigy 550 hexacopter, h550, hexacopter<, , futaba, 7c", futaba7c

 

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Anwar Aziz replied to Larry Grimm's discussion APM 2.5 Arducopter is awesome Go for it! Its not as hard as it looks.
"Can u please put a screen shot of the PID settings? I m doing the same thing over here... Hexa with APM.... really need it... Thanks in advance."
Apr 17
Philip Johansson replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"okaj, that was a good explanation. Nice to see the code as well. But from there. Should not the APM calibrate the motors accordingly to its maximum output? "
Dec 5, 2014
emile replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"Because on bench tests the majority of escs was at full throttle with 97% of the maximum PWM. So the throttle curve tries to linearize this curve and give full PWM at 93% of throttle. Throttle curve does this to find the maximum PWM: int16_t…"
Dec 5, 2014
Philip Johansson replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"Okej, thanx for the tip. But why is the default value 93 if the range is only up to 80? Would there be any difference between 93 to 80 or does 93 get interpreted some other way? "
Dec 5, 2014
emile replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"Throttle curve was made to try linearize ESC output, that usually has it's last 7-10% output same value. Instead of changing MOT_TCRV_MAXPCT to 80 (default is 93) try disabling throttle curve by setting MOT_TCRV_ENABLE to 0. Emile"
Dec 5, 2014
Philip Johansson replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"Thank you for this post. The MOT_TCRV_MAXPCT I've never hear about before. Mine was set to 93 when it clearly says in the parameter list the highest is as you say 80. Changed it now and will se if it makes any difference. =) My previouse…"
Dec 3, 2014
Stephan replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"I ran into the same issue with APM 3.2. After reading through all available forums I think I found the resolution to this problem. First, check the PWM input value for Channel 3 and compare it to the output values for Ch1-4 in the status monitor. In…"
Dec 2, 2014
Philip Johansson replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"I thought of the exact same fix but be aware that it could result in an unstable platform and eventually a crash. Maybe it would be smarter to calibrate at around 1900 or something so the FC still has some power margins of correction if you are at…"
Oct 1, 2014
Gabriel DeVault replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"After attempting to fly and only barely achieving liftoff on what should have been a very healthy platform, I dove into the data and saw the pixhawk commanding about 1800pwm on the servo output channels at 100% throttle command . The…"
Sep 30, 2014
Philip Johansson replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"Trying my old multiwii the platform works really nice!.. I will go up to 4S batteri to be able to run APM, think it will do the trick."
Sep 16, 2014
K slusser replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"I too am having this problem. Our drone is a quad with 12 batteries. It was very sluggish but it was designed to lift a load. Platform was stable, timed well. Running 3.15 firmware after an update I am not sure if it was windows or mps I am suddenly…"
Sep 10, 2014
Philip Johansson replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"Hi, have any of you guys solved the problem? I have tried everything in my power to fix this but going back in firmware. Was out today flying and had even less power than before I tried to fix this problem. Copter would not even lift when battery…"
Sep 10, 2014
Bortek replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"It could also be that multicolor is too heavy for the propellers/motors combination.  You might need bigger props or higher pitch or both.  I have a quad with 850kv motors and 11x5 props, 50cm motor to motor and it weighs 1300g all upp…"
Mar 10, 2014
Nicolas replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"hi, i build a quad with 470kv and 17 inches prop, running on 4s, alltogether 4 kg. i have a throttle issue, on the log i put throttle up but my motors stay at the same rate and i still loose altitude. could it be an esc issue, and i have a great…"
Feb 27, 2014
Nicolas replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"hi,  did you fine a solution, i ve got the same problem, i need 10% more power, when i graph my throttle input and throttle output, apm is applying a coefficient. i tried calibrating esc one by one without apm. i tried putting a higher value…"
Feb 27, 2014
Bortek replied to Larry Grimm's discussion Why are motors not getting full power from arducopter
"I wonder how come none from the developer team or senior members of the forum did not notice this or other posts related to this problem. Thankfully there are other posts helping on this. Anyhow, I think the answer can be found in this…"
Feb 5, 2014

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