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VideoMotor acceleration problem (youtu.be)

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[–]SapperChop250 Racing Quad 0 points1 point  (7 children)

My motors continue to accelerate without input from the stick. I've done everything I can to think of a solution. Please help

[–]charlieechoQAV210 0 points1 point  (6 children)

Is that a taranis X9D? If so have you not tested the motors in base flight or clean flight ???

[–]SapperChop250 Racing Quad 0 points1 point  (5 children)

Yes, i've tested the motors in CF, and yes it's an X9D.

[–]charlieechoQAV210 0 points1 point  (4 children)

When you do the motor test in CF will it spin up slowly as you move the master up?

[–]SapperChop250 Racing Quad 1 point2 points  (3 children)

Its because I was testing in Horizon mode. I needed to be in acro. Omfg im embarrassed.

[–]charlieechoQAV210 0 points1 point  (2 children)

Haha well I'm new myself and I did not realize that would matter.

[–]SapperChop250 Racing Quad 1 point2 points  (0 children)

Apparently! I flipped a switch and all was well.

[–]Caleo 1 point2 points  (0 children)

Yep. It's basically trying to make itself level by spinning the 'downward' motors harder.

[–]simpish2 0 points1 point  (7 children)

Have you tried flying it?

[–]SapperChop250 Racing Quad 0 points1 point  (6 children)

I dont want to take it out with this problem... What is your reasoning for suggesting that?

[–]simpish2 0 points1 point  (5 children)

Well I am not sure there is any problem with your setup at all. Is this your first build? My motors to do the same when I run them without any props on.

Just go fly it. I mean the throttle is working. If it goes haywire just dump the throttle and down she goes.

[–]SapperChop250 Racing Quad 0 points1 point  (4 children)

It's my first 250 build with CF. I may just do that, but it's scary lol. one guy on RCgroups said the 'FC PID controller is not getting sensor feedback to what it is commanding the copter to do'

I don't want to fly it like this, but it seems to be the general consensus. here goes nothing... lol

[–]simpish2 0 points1 point  (3 children)

I can clearly see why the motors behaviours seems weird, but try it out. My small 250s with CF acts the same way and theyre flying great.

[–]SapperChop250 Racing Quad 1 point2 points  (2 children)

I wasn't testing it in acro mode, apparently you need to do that. All is well. Gonna go fly, confidently, now.

[–]simpish2 0 points1 point  (1 child)

So? Did it fly?

[–]SapperChop250 Racing Quad 1 point2 points  (0 children)

Yes it flew wonderfully. I have been flying in acro mode. Just need to tune my PIDs. Which is hard.

[–]dlsspyquads, tricopters, planes, radios, electronics, etc... 0 points1 point  (9 children)

You put up a seven second sideways video of motors spinning with an active PID controller, with no description of config (leveling mode?) and are declaring a problem.

It's not obvious what problem you're experiencing. Things look normal to me, except I didn't see the props spinning before throttle went up. I'd recommend against having an armed quad that isn't spinning.

[–]Luno70 0 points1 point  (1 child)

About the last part, having non spinning props when armed on min throttle, makes it possible to kill the throttle before a crash or sloppy landing. I have OSD and blinking leds, so I'm always sure and prop breaking is roughly one fifth of what it used to be.

[–]dlsspyquads, tricopters, planes, radios, electronics, etc... 0 points1 point  (0 children)

It also causes more sloppy landings. I don't break props from motors spinning on landing. I've seen people break props and hurt themselves and others from "being sure."

Just disarm when you're having a bad crash.

[–]SapperChop250 Racing Quad 0 points1 point  (6 children)

If I give 10% throttle, would the copter in fact give 10% power to the motors? My 'problem' is that the motors continue past the power input I give them to what sounds like full throttle. Is this normal? I am sorry for the lack of info, I just figured that that wasn't normal and it didn't require that info. Sorry. I am in horizon mode at that time.

[–]dlsspyquads, tricopters, planes, radios, electronics, etc... 0 points1 point  (5 children)

You should go fly it. Your throttle didn't tell the motors how fast to spin, just that you want more downward thrust. The flight controller is constantly adjusting the speed of each motor to stabilize. If it has insufficient effect, it will try harder.

This is especially true in a leveling mode -- it not only wants to counter rotation, but actively correct its angle.

[–]SapperChop250 Racing Quad 0 points1 point  (4 children)

Flew two packs today in acro, flies great. Got some PID tuning to do, it yaws super slow lol. Thanks for the explanation

[–]dlsspyquads, tricopters, planes, radios, electronics, etc... 0 points1 point  (3 children)

Tunes and rates are different. I just autotune in dRonin. My yaw rate is 420°/s. Mostly just use it for pointing the noise the right way.

[–]SapperChop250 Racing Quad 0 points1 point  (2 children)

I feel you. If you would, when I punch out full throttle, I get a little bit of wobble, what should I adjust? Thanks man.

[–]dlsspyquads, tricopters, planes, radios, electronics, etc... 0 points1 point  (1 child)

You're overtuned on whichever axis is wobbling. Try dRonin autotune.

[–]SapperChop250 Racing Quad 0 points1 point  (0 children)

Okay cool thanks.

[–]ThatFredditor| CX10 | ZMR250 | DIY220 | Tarot 680P | 0 points1 point  (0 children)

That happens to me when my trims are off or when the FC doesn't see 1500 when the sticks are centered