I have a problem after updating AC to 3.2.1 from 3.1.5.
When in Loiter, the the speed of the motors rev up and down/pulsate quite rapidly. This was working fine when I was using previous versions of arducopter.
I have downloaded the logs, and have looked into accX, accY and accZ. These seems to be inside the range specified in the wiki at arducopter. (Log_vibrations.bin)
Please have a look at the Log.bin, and note the difference between ThrIn and ThrOut when I'm in Loiter mode.
Anyone having any idea what the problem may be?
oops.. the log file..
Hi Marko, thanks for replying... I don't like to problems in the logs so I am going to switch that Power Module out. Its not 3DR but in an HK one.
But I have never had problem with my 3DR Modules... have run those on all my quads... that being said, I give up at this point with tuning and firmwares and am going to try out the hardware change.
Thanks again for replying...
It seems to me, your power module just not have enough power.
Still having the AltHld problem Changed several Parms Is the real problem vibrations ?
Pleas have a look.................
High vibrations, you have to resolve that, here many great info to do it http://diydrones.com/forum/topics/vibration-isolation-and-dampening...
I remember that on APM there was recommendation to add a Cap on one of the channels to reduce VCC spikes.
Any recommendations or process on the Pixhawk ?
The power supply issues are supposed to be solved. However I notice the APM 2.7 has a 150uf filter cap. If you look in the log at VCC you see a lot of spikes. I have added a 2200uf 16volt cap across the 5.3 volt output in the APM power bec and covered it with heat shrink. I then looked in the log again and noticed a marked decrease of spikes so I believe its worth the effort.
do you know if its also possible / recommended on pixhawk as well ?
Thanks LTMNO for looking at my log. Been working on vibrations just had a test flight
and vibrations are better but AltHld still not good. This is my third build and never had this much problem. This frame looks like a TBS but is not TBS. APM 2.6 (frame type set to V)
810Kv 10x4.5 3 cell 3.2.1 FW PS: crash was just a tip over.
It will be pretty hard to get rid of vibrations with 810kV + 10x4.5 + 3 cell.
I have 850kV motors + 4S and still rpm's are not high enough to keep vibrations in lower harmonics.
How much does your copter weight?