February 26, 2015 at 8:14 am #383
I have a new Hex platform I just built and this is the first time I’ve used the PixHawk.
I’m using the DJI E600 ESCs and Motors.
When I arm and slightly increase throttle, not all the motors are starting at the same time.
When I increase the throttle, the ones that started last are running slower than the rest.
If I leave them running on low throttle, the slow ones eventually slow down and stop.
I’ve tried to calibrate the DJI E600 ESCs to the Pixhawk, but they won’t calibrate.
This apparently is correct as the DJI E600 OPTO ESC do not require calibration and so they won’t allow a calibration to run. Love to hear you thoughts on this as well!!
I have flight tested everything today and its flying great once its in the air.
When Im going to take off I can see the platform tilt towards the slower motors until it lifts.
I’ve taken a video on my work bench with the props removed trying to show what I’m talking about.
You can view it here: https://www.youtube.com/watch?v=rkcmp7wbZTE
Any help / Advice on this issue?
Has anyone else run the DJI E600 system on a PixHawk?February 26, 2015 at 8:20 am #384
Solution Found. I think!
It seems that I need to alter the following parameters in Mission Planner to increase the minimum speed required to keep the DJI E600 motors spinning once I arm the Pixhawk:
MOT_SPIN_ARMED to 250
THR_MIN to 300
I’ve tested this without the Props inside the house and it seems to work well. The props will cause some lag so I may have to increase the MOT_SPIN_ARMED to 300 but I won’t know until I’ve had a chance to do further testing.
Stay Tuned.February 26, 2015 at 10:59 pm #386
I’ve done one test flight and haven’t had time to do another yet.
The settings were a little too high and it trying to lift a little at idle.
When I landed it almost tipped over.
I’ve adjusted the MOT_SPIN_ARMED down to 180, which is the minimum I can use to keep the props spinning.
Hopefully I’ll be able to test fly again tomorrow.July 10, 2015 at 10:57 pm #470
Thanks for this write up! I still can’t startup my props with just a radio, but while using tablet to arm and radio to fly if I dipped the throttle to low they would shut off and not always did all of them come back on when I reapplied the throttle. Mission planner needs a total overhaul, this is one of the primary setting in the DJI A2 and Naza v2 autopilots because it changes so much unit to unit. Thanks again!!! btw I am using this one a quad with 3S cell batteries 4000-5000 mha and Gartt ML2212 920 KV motors and Gartt 20A ESC speed controllors with a spectrum DX8 on both a quad and hexacopter f450 and f550 flame wheel frames with plastic legs for landing gear. Also own, DJI Inspire 1 dual radio, Phantom 3 pro, several phantom 2 vision plus units, FC40 and a couple of others. Love the 3DR open endedness but lacks so much in terms of stability and preconfigured profiles for popular builds.
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