I have a X525 quadcopter and i want some PI setting for my quad. Actually when I'm trying to fly the quad its automatically going left or right every time. Its not stable, i have done calibration still its not stable. Then i search the net and came to know that their are some PI setting factor. So can someone tell me which setting will be good for a stable quads ?

PI settings differ from craft to craft and there are many other factors that affect PI. The default values should be good enough for your frame and usually you would need to increase it.

Anyways have you programmed the Tx for Self level and acro mode? I mean in which mode was your quad flying?

Self level mode means the quad will maintain attitude after a change in roll or pitch. It wont hold the position until you are using GPS(kk 2 doesnt support GPS), n it will drift around.

first you should do the esc calibration had a similar problem when i started out with my quad.it became quite controllable once the esc was calibrated.

+1 rustydusty, Everyone forgets that crucial step.

thanks guys for your reply. i have done d ESC calibration but my PI setting was in default mode n all values was like 250 and so on. Finally i have done the PI setting and now its stable .

My Quadcopter

i have the same very kit.i suggest you put some smiley balls below the four legs to take the impact,else your motor mounts can crack.i had to replace mine with mild steel ones i made in workshop.whenever u make a hard landing, the entire momentum will be transferred to these mounts.btw how much flight time you are getting?

@rustydusty: m getting near about 15-20mins with my 3300Mah Lipo . n like u said d smilee ball instead of tht if i use x525 skid(Attachment ) will it help? what do u think.

Nice flight time, whats the AUW?

1200gm i think, hav'nt measure yet. but not more than that.

well it should be good but only problem is that the CG will be shifted upward meaning that the quad will more likely tend to topple in case of hard landings.with supports below the motors,the impact is directly transferred to the supports,but with the landing skids,the impact is transferred to the central hub where the skids are mounted.i think the advanced flyers should go for the skids.this is my opinion and i am no expert.

can any veteran shed some light on this...i ahve a 3300mah lipo and when i check the voltage from the voltage checker, the second cell always shows less and its indication is always blinking.does this mean that a cell has gone bad?is there a way to recover it?flight time has also reduced drastically.

@sudiptarc.
Hey bro , i hav also same prblm of drifting of quad.  Can u tell me ur final pi setting for stable quad

what about charging the cell, does it get charged at the same time as same cells.
Simonk escs used in quads dont have low voltage cut off.
which means the only way you get to know about low batt is when you lose the lift and land it. this puts the cells way beyond the 3.7V threshold. better use a low voltage checker right when the quad is in action or you might be buying lipos in the future.

, this video will help u figure out all ur autolevel,pi editor , and drifting problems provided ur using a kk2 board..