ARF 525 QUAD from quadkopters.com build

Started by VTOLkarthik, December 17, 2014, 09:34:40 PM

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SK1701

Yes, rudder is supposed to make diagonally opposite motors (which spin in the same direction) spin faster. Left rudder should make the CCW motors (M2 and M4) spin faster.

VTOLkarthik

Oh then there was no issue... I got confused then!
Will it be okay if I interchange rudder and aileron?
since elevator n rudder r on left in my tx its easier to control...

VTOLkarthik


sooraj.palakkad

Quote from: VTOLkarthik on December 25, 2014, 08:50:11 PM
Will it be okay if I interchange rudder and aileron?
since elevator n rudder r on left in my tx its easier to control...

So your Tx is mode1 ?
Well, there is no problem in interchanging the aileron and rudder channels if it is comfortable for you.
Bu which is your radio ?
RC Hobbyist and an Aerial Cinematographer..

akhilzid

Quote from: sooraj.palakkad on December 27, 2014, 11:43:45 PM
So your Tx is mode1 ?
he is now using as mode 3 and he need to change that to mode 1.
Quote from: sooraj.palakkad on December 27, 2014, 11:43:45 PM
Well, there is no problem in interchanging the aileron and rudder channels if it is comfortable for you.
and mode 1 is commonly using than mode 3 (same hardware but rudder and aileron interchanged)

sooraj.palakkad

Quote from: VTOLkarthik on December 25, 2014, 08:50:11 PM
Will it be okay if I interchange rudder and aileron?
since elevator n rudder r on left in my tx its easier to control...

Reading the above post I thought he is currently using a mode1 .
RC Hobbyist and an Aerial Cinematographer..

VTOLkarthik

I hav elevator n rudder in left...which is model1... Right?

VTOLkarthik


akhilzid

Quote from: VTOLkarthik on December 28, 2014, 01:33:34 PM
I hav elevator n rudder in left...which is model1... Right?
Yes,

VTOLkarthik

Ok... Ill interchange the elevator n rudder and test it today

sooraj.palakkad

Quote from: VTOLkarthik on December 28, 2014, 01:47:47 PM
Ok... Ill interchange the elevator n rudder and test it today

you meant aileron and rudder, ain't you ???
What you are trying to do is changing your transmitter to work as mode3 . But most programmable transmitters have built in mode settings, to chose different modes - if your Tx has such a function, you can avoid interchanging receiver connections :)
RC Hobbyist and an Aerial Cinematographer..

VTOLkarthik

Oh sorry I mean rudder n ailerons..!  :bow:
I dont hav tat settings... :banghead:
btw I tried to maiden it, but broke 2 props  :-\
Hw to tune the PI settings?  :banghead:
I need to to chk wit d manual or need to google it.. :headscratch:

gunnu


VTOLkarthik

I had near to these values... Will chk once again later...

sooraj.palakkad

@VTOLKarthik, default PI values are enough for starting, after stabilizing your quad with transmitter expo, sub trims and trims, you can get to PI tuning , for the response you need :)
RC Hobbyist and an Aerial Cinematographer..

VTOLkarthik

PI values fr gain n limit were around 200, 250...
so st it to recommended settings as in d manual..wil tat be ok?

SK1701

250 is way too high. What are the new values you set it to? This link will also help you tune the quad: http://oddcopter.com/2013/01/06/easy-diy-quadcopter-build-part-4-tuning/ The initial values given in this link should be OK. BTW, what are your self-level gains?

VTOLkarthik

Self level is off...
Gain n limit was near to this value...

SK1701

I think you should first try flying with self level on and then once you are used to it move on to flying in acro mode. Self level helped me a lot when I first started flying my quad and now I am confident flying with self level turned off. Set the PI gains to:
Roll/Pitch P-gain: 30 (This is pretty low, you could even start around 40-50)
Roll/Pitch P-limit: 100
Roll/Pitch I-gain: 0
Roll/Pitch I-limit: 20

Yaw P-gain: 50
Yaw P-limit: 20
Yaw I-gain: 0
Yaw I-limit: 10

Self level P Gain should be around 40-100 (max). Newer firmware versions have improved self level feature so an update may help your flight performance. just to check, you have loaded the correct motor configuration right?

VTOLkarthik

Ok wil try wit self level on...
yes I hav loaded d correct motor configuration...

VTOLkarthik

Guys flew it today...!!!
Its was little unstable was tuning n flying... Suddenly d prop broke off in d mid flight n crashed... 2 props broke n motor mount broke off too... Couldn't take a video though..

sooraj.palakkad

Prop broke in mid air , out of nothing ??? , that is unimaginable !! , where the props very weak due to previous crashes ?
RC Hobbyist and an Aerial Cinematographer..

VTOLkarthik

It crashed once on side ways on grass... Aftr tat I flew twice n then on third time d prop broke mid air n wen it toppled over, d opposite prop broke...

VTOLkarthik

Broke motor mount

gunnu

suggestion for motor mount... drill holes in aluminium booms and mount motors on that quite strong...