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Users => Vehicles - MultiRotors => Topic started by: ansonvarghese on March 29, 2018, 01:19:00 pm

Title: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on March 29, 2018, 01:19:00 pm
I have an f450 with 1000 kv motors with 30 amp esc,3s 2200mah battery.After all the transmitter setup.
when i increase the throttle after a little increase a huge increase of thrust is found and some motors are getting more speed and all...and i cant fly it because either flows to t :'( :'( :'( :'(he roof on a sudden or flips to a suddden and crash...

Attached Settings File..
https://www.youtube.com/watch?v=58iVC0DFV7s (https://www.youtube.com/watch?v=58iVC0DFV7s)


LINK  to video : youtu.be/58iVC0DFV7s
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: tinou on March 29, 2018, 04:35:24 pm
Quad 450 inside :o :o :o crazy man. Propellers are very dangerous!
Go outside and when you take off pulse your throttle with more powerfull and after decrease it.
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on March 29, 2018, 04:41:43 pm
Quad 450 inside :o :o :o crazy man. Propellers are very dangerous!
Go outside and when you take off pulse your throttle with more powerfull and after decrease it.
sure...have any idea whats wrong?

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Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: tinou on March 29, 2018, 05:24:06 pm
Test outside with what i have said. Take video if it's possible
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: octavvian on March 29, 2018, 06:45:37 pm
Quad 450 inside :o :o :o crazy man. Propellers are very dangerous!
Go outside and when you take off pulse your throttle with more powerfull and after decrease it.
sure...have any idea whats wrong?

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ESC are calibrated? as explained in wiki...
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: f5soh on March 29, 2018, 07:54:35 pm
Be sure the "Zero the integral when Throttle is low" is checked in Stabilization > Basic (at bottom page)

(https://forum.librepilot.org/index.php?action=dlattach;topic=4204.0;attach=7347)

No need to post using 36pt font size (first post cleaned).
Thanks. 
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on March 29, 2018, 09:04:54 pm
That actually look pretty close to flying, but it looks very mushy and your yaw should be locked on, and not spinning.

It should not spin at all.  That is a big hint that something is wrong.

#1 you should not move the transmitter trims, ever, not at all after you run the transmitter wizard.  Set trims to neutral and make sure they match what you see on the Input page.
#2 the quad must be motionless just after plugging the battery in.  This is so the gyros can calibrate correctly.
#3 you should be using Stabilzed1 which is Atti,Atti,AxisLock,Manual
#4 ESC protocol should be at least PWMSync or [email protected] (or OneShot* or MultiShot)

What settings have you changed after finishing the aircraft setup wizard?
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: f5soh on March 29, 2018, 09:29:10 pm
A quick check using settings attached in first post ?

Quote
#2 the quad must be motionless just after plugging the battery in.  This is so the gyros can calibrate correctly.
This motionless rule doesn't matter assuming the "Wait the board is steady" is currently checked in Attitude tab.

Quote
#3 you should be using Stabilzed1 which is Atti,Atti,AxisLock,Manua
There is only one flightmode, already set to Attitude,Attitude,AxisLock,Manual.

Quote
#4 ESC protocol should be at least PWMSync or [email protected] (or OneShot* or MultiShot)
ansonvarghese uses PWM as input, and PWM-490Hz for outputs. Seems a CC3D.
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on March 29, 2018, 10:40:00 pm
Indeed.  I watched the video but did not look at the settings file and just tried to pass on some hopefully helpful ideas to him and anyone else having a similar issue.

Since it is a CC3D, it seems clear that he has adjusted the yaw trim.  That is the most obvious thing that causes such a clear yaw motion.

As I recall, wait for board steady looks at acceleration, so it can be fooled by constant velocity and the fooling made easier to do by adjusting variance as we sometimes tell people to do.  A user might put in a high variance to get it to arm and this is the result.  It's easier for him to recall that he did this than for me to look up default variance.
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on March 30, 2018, 05:46:01 am
What should i do to fix.the current situation

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Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on March 30, 2018, 06:20:24 am
I would start with this (flight battery plugged in, transmitter on, and quad USB plugged into computer, run GCS):
Set trims to neutral and make sure they match what you see on the Input page.

Where they do not match (I can see that yaw does not match) you can manually set the channel center in GCS or transmitter trim.

Practice flight should be a little higher, knee high, and outside over nice grass in case you must suddenly chop throttle.

Don't give sudden stick motions.  Strive to use the smallest and smoothest stick motions possible to hover continuously for 10 seconds.  If you can hover and keep it knee high and within a meter or 2 for a whole battery, you have won.  :)

When there is no wind:  During this time you will probably find that you must hold some roll and pitch command to keep it from drifting.  The best way to adjust this drift is in Attitude->RotateVirtual:
 - if it is drifting forward you subtract some more from pitch
 - if it is drifting left you subtract some more from roll

Start by adding/subtracting a couple degrees at a time and fine tune maybe down to add/sub 0.1 degree till it drifts as little as possible (no wind).
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on March 30, 2018, 08:33:21 am
I would start with this (flight battery plugged in, transmitter on, and quad USB plugged into computer, run GCS):
Set trims to neutral and make sure they match what you see on the Input page.

Where they do not match (I can see that yaw does not match) you can manually set the channel center in GCS or transmitter trim.

Practice flight should be a little higher, knee high, and outside over nice grass in case you must suddenly chop throttle.

Don't give sudden stick motions.  Strive to use the smallest and smoothest stick motions possible to hover continuously for 10 seconds.  If you can hover and keep it knee high and within a meter or 2 for a whole battery, you have won.  :)

When there is no wind:  During this time you will probably find that you must hold some roll and pitch command to keep it from drifting.  The best way to adjust this drift is in Attitude->RotateVirtual:
 - if it is drifting forward you subtract some more from pitch
 - if it is drifting left you subtract some more from roll

Start by adding/subtracting a couple degrees at a time and fine tune maybe down to add/sub 0.1 degree till it drifts as little as possible (no wind).

Can i get a video tutorial on how to do it or Screenshot perhaps would help me alot..Thanks alot  brother
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on March 30, 2018, 11:25:15 am
https://www.youtube.com/watch?v=1HVzzIdUBDI (https://www.youtube.com/watch?v=1HVzzIdUBDI)

Current Situation..Video please watch and help

Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: f5soh on March 30, 2018, 07:10:34 pm
Quote
What should i do to fix.the current situation

See post above (https://forum.librepilot.org/index.php?topic=4204.msg28540#msg28540) ^^

You should check first the "Zero the integral when Throttle is low" (not checked in current config file you posted), this solve issues with integral term accumulation.
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on March 30, 2018, 07:12:17 pm
That one arm looks broken.  It broke on impact, but if it can flex in the air, then it will not stabilize correctly.

I think this is a standard F450.  Clone F450 are very cheap on eBay.  I always buy 2 so that I have repair parts.  Here is an example for about USD $12
https://www.ebay.com/itm/Multi-rotor-DJI-F450-4-Axis-Quad-Copter-Frame-Airframe-Integrated-PCB-Wiring-New/272739794195
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on March 30, 2018, 07:15:38 pm
One other thing that it could be is vibration.  Have you balanced your props well?

@f5soh:  Video shows that it gets off the ground without flipping, but wobbles / oscillates and is mushy.
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on March 31, 2018, 01:39:07 pm
Now i Have new issue the ESC is not calibrating..no sound from 2 esc...and motor doesnt spin Now after firmware reinstall
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on March 31, 2018, 05:29:25 pm
This begins to sound like something I suspected.  Do you have ESCs 1-4 actually plugged into connectors 1-4 or maybe into connectors 3-6?  That would explain the wobble in a round about way.  Plug them into 1-4 rather than changing config to allow 3-6.
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 01, 2018, 06:08:19 am
This begins to sound like something I suspected.  Do you have ESCs 1-4 actually plugged into connectors 1-4 or maybe into connectors 3-6?  That would explain the wobble in a round about way.  Plug them into 1-4 rather than changing config to allow 3-6.

I re calibrated the ESc's and now its fine and i have attached the propler and one isssue is that its not taking off...just the motor spinning really hard and no lift is produced and i have attached the props in all possible combinations and not even lifting off from the ground.and i really need this to fly asap.Please do help
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on April 01, 2018, 06:51:36 am
Bad ESC Calibration that does not run the ESCs at full power?

Props not tight?  Wrong prop on each motor so that it blows upward?  Dead battery?
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 01, 2018, 07:00:10 am
Bad ESC Calibration that does not run the ESCs at full power?

Props not tight?  Wrong prop on each motor so that it blows upward?  Dead battery?
Props and battery are.fine and.esc.seems.fine

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Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on April 01, 2018, 07:25:19 am
Bad ESC calibration can do this.  Considering that you did ESC calibration recently, I would suggest recalibrating and make sure you use full throttle during calibration.  It is best to do it according to wiki instructions, using FC, not transmitter, so you know you used full throttle range, and got all ESCs calibrated the same.
https://librepilot.atlassian.net/wiki/spaces/LPDOC/pages/12058743/ESC+Calibration


Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 01, 2018, 03:37:03 pm
Bad ESC calibration can do this.  Considering that you did ESC calibration recently, I would suggest recalibrating and make sure you use full throttle during calibration.  It is best to do it according to wiki instructions, using FC, not transmitter, so you know you used full throttle range, and got all ESCs calibrated the same.
https://librepilot.atlassian.net/wiki/spaces/LPDOC/pages/12058743/ESC+Calibration

I have done the ESC calibration and beeps are perfectly fine and the same probb presist..the quad is not lifting offf..I have props with name :1045 R & 1045 (nothing)
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on April 01, 2018, 05:27:14 pm
If you put props in the wrong place, it blows upward, not downward.  Is it blowing upward?
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 01, 2018, 06:12:32 pm
If you put props in the wrong place, it blows upward, not downward.  Is it blowing upward?
No all are blowing downwards

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Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on April 01, 2018, 06:54:12 pm
It used to lift off.

That means it is either:
- tx stick not producing large enough signal
- fc configured to not produce enough output signal from the input signal
- esc calibration
- battery
- props on wrong somehow (e.g.upside down)

One last question.  Did it used to take almost full throttle to take off?  That will cause instability
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 01, 2018, 07:25:10 pm
It used to lift off.

That means it is either:
- tx stick not producing large enough signal
- fc configured to not produce enough output signal from the input signal
- esc calibration
- battery
- props on wrong somehow (e.g.upside down)

One last question.  Did it used to take almost full throttle to take off?  That will cause instability
It used to lift after i reinstalled the firmware and arm.fixed it's not lifting up..and i am not sure what's wrong..everything seems.fine..and it.used to lift off thats my concern

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Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 08, 2018, 04:10:45 am
Is this thread dead...none is responding.
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 08, 2018, 04:37:31 am
Well i have my quad which is not lifting off from ground and all the props are correct and what all things i need to do to fix it up.
Setting file attached.
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: f5soh on April 08, 2018, 10:34:22 am
Is this thread dead...none is responding.
Well, no need to start a new thread.
I see you go back to Gcs 15.09.

There is nothing wrong in configuration you posted.
We do not have a crystal ball to magically resolve your issue remotely :)
 
Post pictures from your build maybe.
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 08, 2018, 10:43:03 am
Is this thread dead...none is responding.
Well, no need to start a new thread.
I see you go back to Gcs 15.09.

There is nothing wrong in configuration you posted.
We do not have a crystal ball to magically resolve your issue remotely :)
 
Post pictures from your build maybe.
Hehe...I was being hetic with the issue...thanks for the suport broo..

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Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: utoedter on April 08, 2018, 08:48:23 pm
To check if there is enough lift, you can test it on the output screen. But it’s a dangerous procedure. Bind the quad with thin rope on all four arms to the ground, so that it can lift off a few centimeters.  Check the ropes for same length. Connect all motor sliders at output screen as you did at the ESC calibration.  Increase the power carefully  by using the slider. Look it it’s lift off. For that procedure use a long usb cable. Secure the cable that it can’t slide out of the CC3D board with a cable strip on frame. If it lifts off then a few cm, the ESC are fine and there is enough lift and the propellor setup is correct. Normally that shall happen at 50%. 

As I said it’s dangerous to take all precautions not to get wounded!!


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Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 09, 2018, 02:54:13 am
I think the prob is with Battery i have an orange LIPO 3S 2200 mah  ...and on chargeing 2 cells are charging one is not how can i fix it?

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Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: TheOtherCliff on April 09, 2018, 04:52:12 am
What is the voltage of the bad cell?  How low has that cell ever been?

...  Dead battery?
Props and battery are.fine and.esc.seems.fine

Learn how to properly handle lipo battery.  If you discharge it too much, it will never charge properly again.  Get a LiPo alarm and set it to 3.6 volts per cell and always use alarm during flight, and always obey it immediately.  Always store battery at 3.8v per cell.  Never leave it fully charged for more than a day.  Never store in a hot place like car in summer time.
https://www.ebay.com/itm/3-7-30-v-1-8-s-fe-li-ion-lipo-battery-low-voltage-Buzzer-alarm-2-in-1/162809787582
Title: Re: The quadcopter doesnt gradually increase the thrust..HELPPPPPPP
Post by: ansonvarghese on April 15, 2018, 03:45:11 am
I got a new battery and new frame will be testing soon..and i will update. if there any problem. Thanks Brothers

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