Underpowered quad problem (clone pixhawk issue?) [renamed post due to TOS]

Whats up yall. So there will be profanity in this post. If you have small children have them look away now.

I am on my last wit here. If this cannot get fixed, I will post a video of me blowing up this f*****g quad in some shape or form. All work Flawlessly and the issue came out of absolute nowhere.

So............. New Motors, New ESC's, ALL new wiring. Only the bare essentials connected. Reinstalled Pixhawk firmware. Re-Flashed pixhawk. Re-Flashed Devo Transmitter. Tested quad with pre-arm off. Re calibration of pixhawk. Tried again. Removed power module. Powering pixhawk with 5v leads from ESC's.

The quad cannot leave the ground......It seems as if the quad is EXTREMELY under powered. When at full throttle, the thing runs for a few more seconds, then a full blackout. I mean FULL blackout. ESC's, Flight Controller. even with the battery connected. To power back on, The battery needs to be unplugged and plugged back in again.

PLEASE PLEASE PLEASE PLEASE PLEASE help.....................................for god's f*****g sake.

P.S. I intended on using more profanity.....

Replies

Emin Bu May 7, 2015 at 11:47pm

Can we get ANY data of your quad??picture?video?Anythng...
- Crispin > Emin Bu May 8, 2015 at 9:40am
  
  OK, try other tests. You've got a dodgy connection somewhere. Or at least rule it out
  - Shaheen Adelinia > Crispin May 8, 2015 at 10:37am
    
    I'll post the results in a few hours
    - Shaheen Adelinia > Shaheen Adelinia May 8, 2015 at 3:46pm
      
      So just doing some continuity tests, if i touch the ground terminal to the signal wire on the ESC, there is a small bit of continuity. Is this normal?
      - Crispin > Shaheen Adelinia May 8, 2015 at 3:52pm
        
        It's not strange. You're reading through the circuit now.
        
        Just check grounds to grounds. Should be far less than one ohm or so.
        
        Wiggle the wires
        
        Shaheen Adelinia > Crispin May 8, 2015 at 3:57pm
        
        all grounds make good contact
        
        Tested the ground rails on pixhawk and receiver as well
        
        Shaheen Adelinia > Shaheen Adelinia May 8, 2015 at 4:01pm
        
        If i touch the hot wire from battery terminal to the ground, there is a bit of continuity too....does that say anything?
        
        Shaheen Adelinia > Shaheen Adelinia May 8, 2015 at 4:02pm
        
        The ohm rating increases steadily, could it be the capacitor in the ESC?
        
        Crispin > Shaheen Adelinia May 9, 2015 at 2:39am
        
        Ok, so you left the one test lead on the negative plug at the battery end and tested each of the negatives at the ESCs. They all checked out. Did you rattle and fiddle with the wires as part of the test?
        
        Yes, the steadily increasing resistance would be a cap charging up somewhere in the circuit.
        
        Right, let's try look at the next thing. Power.
        
        Did you measure across the power module?
        
        Connect your tester to the Pixhawk RC out +/- The easiest and safest way is to sacrifice a servo extension lead.You should see roughly 5.3V. When you put full throttle does it remain at 5.3 or does it die?
- Crispin > Emin Bu May 8, 2015 at 9:22am
  
  OK, suggests it us load related. Try all props off then add one at a time until it trips. Check that esc first.
  
  Put props on upside down

of 7

This reply was deleted.

Discussions

Underpowered quad problem (clone pixhawk issue?) [renamed post due to TOS]

Replies

Activity