hey guys ive been building a quad with the HFP and some reflashed 40A hobbyking red brick ESCs along with some rc timer 700kv 20A motors.
my first problem once the quad was built and everything was hooked up was that only one motor would fire up, after disconnecting the battery and trying again 2 motors would work, after disconnecting once more only one motor worked again WTF.
the motor that worked each time was the one with the regulator supplying the HFP (the other 3 ESC's had the positive disconnected). i connected each ESC and motor to a RX and battery seperate to the HFP, each motor/ESC combo worked fine.
i then soldered a 150 OHM resistor from the positive of each ESC to ground(except for the ESC powering the HFP)
all motors started at once life was good.
after an hour or so of flying the HFP would occasionally go into AL as soon as it was off the ground (although AL had not been activated)
it would also very rarely switch wildly between non AL and AL causing it to twitch and jitter almost uncontrollably, sometimes it would not engage AL at all staying in manual mode. i tested my TX and RX for pulse position change with an oscilloscope and could not find anything wrong there.
very soon after this problem developed a new problem appeared! i would start and fly the quad and it worked fine. then i would land, throttle down, and throttle up again shortly after. sometimes and without any prior misbehavior the quad would imediatley begin to yaw uncontrollably and i would have to put it down however possible(luckily it yawed straight away so it never gained much height) this problem came and went at random and NOTHING seemed to make a difference. at this stage i was pulling my hair out trying to work out what was wrong, while trying to determine what was the cause of the AL problem i had to quad plugged into the comp and was switching between AL and manual and noticed the box on the setup client wasnt corresponding to the switch position on my TX, i wiggled the servo leads that go between the RX and HFP board and discovered that the AL seemed to be engaging correctly, i wiggled them again the AL refused to follow the switch position( staying in AL or not goin into AL) the servo leads were brand new and appeard to have excellent contact and were not physically loose. i disasembled the servo leads at one end and found the wires to be nicely stripped and crimped to the female connector, i then took the other end of the servo lead appart and found that all 3 wires were COLD SOLDERED AND NOT/TO HALFED CRIMPED. after finding this i took each servo lead apart and found that one end of each lead was stripped and crimped correctly while the other end was poorly soldered and sortof crimped and sometimes not. all 20 of these leads from hobbyking were the same. i resoldered each lead and reconnected them to the quad. after 2 hours of flight therehas not been a single glitch,hick up,wobble or anything i couldnot believe it.
Also nearly forgot to mention random flips during the first few flights, i read that the bullet connectors between the motor's and ESC's are not always as good as you think they are! I couldnt see anything wrong with my solder job on the bullets but after soldering the motors to the ESC's i never experienced another flip
for those without the attention span.
uncontrollable yawing and AL problems were caused by tinytinytiny poor connections between RX and HFP board as a result of ****ty half arse hobbyking leads.
hope this helps someone.
my first problem once the quad was built and everything was hooked up was that only one motor would fire up, after disconnecting the battery and trying again 2 motors would work, after disconnecting once more only one motor worked again WTF.
the motor that worked each time was the one with the regulator supplying the HFP (the other 3 ESC's had the positive disconnected). i connected each ESC and motor to a RX and battery seperate to the HFP, each motor/ESC combo worked fine.
i then soldered a 150 OHM resistor from the positive of each ESC to ground(except for the ESC powering the HFP)
all motors started at once life was good.
after an hour or so of flying the HFP would occasionally go into AL as soon as it was off the ground (although AL had not been activated)
it would also very rarely switch wildly between non AL and AL causing it to twitch and jitter almost uncontrollably, sometimes it would not engage AL at all staying in manual mode. i tested my TX and RX for pulse position change with an oscilloscope and could not find anything wrong there.
very soon after this problem developed a new problem appeared! i would start and fly the quad and it worked fine. then i would land, throttle down, and throttle up again shortly after. sometimes and without any prior misbehavior the quad would imediatley begin to yaw uncontrollably and i would have to put it down however possible(luckily it yawed straight away so it never gained much height) this problem came and went at random and NOTHING seemed to make a difference. at this stage i was pulling my hair out trying to work out what was wrong, while trying to determine what was the cause of the AL problem i had to quad plugged into the comp and was switching between AL and manual and noticed the box on the setup client wasnt corresponding to the switch position on my TX, i wiggled the servo leads that go between the RX and HFP board and discovered that the AL seemed to be engaging correctly, i wiggled them again the AL refused to follow the switch position( staying in AL or not goin into AL) the servo leads were brand new and appeard to have excellent contact and were not physically loose. i disasembled the servo leads at one end and found the wires to be nicely stripped and crimped to the female connector, i then took the other end of the servo lead appart and found that all 3 wires were COLD SOLDERED AND NOT/TO HALFED CRIMPED. after finding this i took each servo lead apart and found that one end of each lead was stripped and crimped correctly while the other end was poorly soldered and sortof crimped and sometimes not. all 20 of these leads from hobbyking were the same. i resoldered each lead and reconnected them to the quad. after 2 hours of flight therehas not been a single glitch,hick up,wobble or anything i couldnot believe it.
Also nearly forgot to mention random flips during the first few flights, i read that the bullet connectors between the motor's and ESC's are not always as good as you think they are! I couldnt see anything wrong with my solder job on the bullets but after soldering the motors to the ESC's i never experienced another flip
for those without the attention span.
uncontrollable yawing and AL problems were caused by tinytinytiny poor connections between RX and HFP board as a result of ****ty half arse hobbyking leads.
hope this helps someone.
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