# Help With Custom Mixers

**URL:** <https://discuss.px4.io/t/help-with-custom-mixers/25433>\
**Category:** PX4 Autopilot\
**Created:** [December 13, 2021, 4:42pm UTC](https://discuss.px4.io/t/help-with-custom-mixers/25433 "2021-12-13T16:42:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![BobbyTrendy](https://discuss.px4.io/letter_avatar_proxy/v4/letter/b/85f322/32.png) [@BobbyTrendy](https://discuss.px4.io/u/BobbyTrendy)\
**Post date:** [December 13, 2021, 4:42pm UTC](https://discuss.px4.io/t/help-with-custom-mixers/25433/1 "2021-12-13T16:42:11Z")

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**REPOST**

Hello all, looking for help swapping out a mixer file. I’m currently using a copy/paste of the exact file the airframe calls up in order to avoid other issues inside the mixer until I can get it to load. I’ve copied the text file into Notepad ++, set EOL Conversion to Unix, saved as XXXX.main.mix, placed file onto microSD. When I use the NSH command mixer load /dev/pwm\_output0 /fs/microsd/etc/mixers/XXXX.main.mix it returns an NSH prompt (no errors) but all RC outputs go to zero. Since the file contents are 100% the same as the original I’m assuming it is a file naming or formatting error. Any help is much appreciated.

@romain-chiap

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**Author:** ![Romain\_Chiappinelli](https://discuss.px4.io/user_avatar/discuss.px4.io/romain_chiappinelli/32/6089_2.png) [@Romain\_Chiappinelli](https://discuss.px4.io/u/Romain_Chiappinelli)\
**Post date:** [December 16, 2021, 8:24am UTC](https://discuss.px4.io/t/help-with-custom-mixers/25433/2 "2021-12-16T08:24:30Z")

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Hi,

Which version of PX4 are you using?  
Here are the [docs](https://docs.px4.io/master/en/concept/mixing.html#loading-a-custom-mixer).  
In the NSH console, can you see your file?  
(`cd fs/microsd/etc/mixers/` then type `ls`)

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**Author:** ![BobbyTrendy](https://discuss.px4.io/letter_avatar_proxy/v4/letter/b/85f322/32.png) [@BobbyTrendy](https://discuss.px4.io/u/BobbyTrendy)\
**Post date:** [December 17, 2021, 1:58am UTC](https://discuss.px4.io/t/help-with-custom-mixers/25433/3 "2021-12-17T01:58:41Z")

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Hi R, thx for helping out.

Currently running 1.8.1.

Entering nsh\> cd fs/microsd/etc/mixers/

response is

cd: chdir failed: No such file or directory

response is same for cd fs/microsd/etc/

If on the other hand I enter cd fs/microsd/ i get command prompt then enter ls the response is:

/fs/microsd:  
dataman  
log/  
APM/  
bootlog.txt  
logdata.txt  
System Volume Information/  
etc/

Thx again!

G  
@romain-chiap

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**Author:** ![Osama\_Mamdouh](https://discuss.px4.io/letter_avatar_proxy/v4/letter/o/65b543/32.png) [@Osama\_Mamdouh](https://discuss.px4.io/u/Osama_Mamdouh)\
**Post date:** [September 11, 2023, 1:04am UTC](https://discuss.px4.io/t/help-with-custom-mixers/25433/4 "2023-09-11T01:04:23Z")

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I have a multi-rotor drone and I’ve set up the model and run it on PX4. Now, I need to make some modifications to make the motors tilt at an angle on the arms, and I know this will affect some files. Can you tell me how to do that? Thank you.