# Throttle unstable & Accel 0&1 clipping causing a crash

**URL:** <https://discuss.px4.io/t/throttle-unstable-accel-0-1-clipping-causing-a-crash/33381>\
**Category:** Uncategorized\
**Created:** [July 23, 2023, 10:16am UTC](https://discuss.px4.io/t/throttle-unstable-accel-0-1-clipping-causing-a-crash/33381 "2023-07-23T10:16:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Falcon](https://discuss.px4.io/letter_avatar_proxy/v4/letter/f/49beb7/32.png) [@Falcon](https://discuss.px4.io/u/Falcon)\
**Post date:** [July 23, 2023, 10:16am UTC](https://discuss.px4.io/t/throttle-unstable-accel-0-1-clipping-causing-a-crash/33381/1 "2023-07-23T10:16:35Z")

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Hi all,

I need a log file reader expert plz🙏🏻  
I had a flight with mini quadcopter drone using MRO pixracer FC and PX4 1.13.3 release I flew in stabilized flight mode first and all was ok then I tried position flight mode the drone hovered ok then I increase throttle little and drone went fast up like it’s stuck in a high throttle or something so I applied kill switch mid air and then I deactivated it to fly again and it did the same way and then made a kill switch mode again and drone crashed. My question what caused that acceleration instability & failure and unstable throttle acceleration in position mode? I saw warnings about ACCEL 0 clipping! Please find log below

[https://logs.px4.io/plot\_app?log=baaa6e1f-5303-43ea-ab50-b48a46a834d1](https://logs.px4.io/plot_app?log=baaa6e1f-5303-43ea-ab50-b48a46a834d1)

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**Author:** ![Mohannad](https://discuss.px4.io/letter_avatar_proxy/v4/letter/m/e79b87/32.png) [@Mohannad](https://discuss.px4.io/u/Mohannad)\
**Post date:** [September 30, 2023, 8:52pm UTC](https://discuss.px4.io/t/throttle-unstable-accel-0-1-clipping-causing-a-crash/33381/2 "2023-09-30T20:52:04Z")

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Hi,

it is because of the high vibration of your drone  
follow this [link](https://docs.px4.io/main/en/log/flight_review.html#vibration) to reduce the vibration  
make sure the motors and props are parallel to the ground. Take a look at this [link](https://discuss.px4.io/t/ekf-filter-fault-warning-and-problems-during-flights/25322)  
calibrate the sensors of the flight controller in the test field

here you can see the accel clipping as stated in the log file.

 ![2023-09-30 21_43_38-Downloads](https://discuss.px4.io/uploads/default/original/2X/8/8b17b532212a70f8571faa0c3650bae1374f8d39.png)

The reason is mostly phisitcal so try to fix that.  
If you did everything mintioned and you still have vibration you can reduce **IMU\_DGAYRO\_CUTOFF** to 20 or even 15Hz and \*\* IMU\_GYRO\_CUTOFF\*\* to 30Hz if thats help.

Best,