Motor 3,4 spinning less than motor 1,2

is all motors spin in same speed , in the servo output in mission planner motor 3 and 4 are spinning less compared to motor 1,2 no matter what channel it is and I’m using f450 frame

Hello, is the vehicle on the ground ?

no it’s a drone (f450 frame), pixhawk FC
i mentioned earlier

This is meaningless. Use Mission Planners Motor Test function to test motors.

oh okay
I’m kinda new to this
so what would be the possible problem here
i tried changing the FC too ,
can you explain why motor 3,4 are not getting same as 1,2 irrespective of the channels if i assign motor 3 for channel 1 it’s behaving the same

There is no problem. Are you testing on the bench with the Transmitter?

i tried flying but it’s flipping right side

Did you run the Motor Test in Mission Planner to determine if the motor order and direction are correct?

In any case start over from here Methodic Configurator

ok I’ll try and let you know
one more question
is it nothing to consider that servo output
I mean motor 3 and 4 output is low when full throttle is given it goes to max and within seconds it decreases and stays wher it’s shown in the image

Also this is a pretty basic drone with pixhawk 2.4.8 FC

Answer my questions 1st.

yes everything is perfect

is the TX would be a problem
I’m using fsi6s tx and fsiA10b rx

Only the motor test counts. Arming the drone and running the motors on the bench is fun, but it doesn’t tell you much because the control loop is confused. It is adjusting the speed of the motors to get the drone to a specific attitude, either because it’s not sitting 100% flat on the bench or you’re moving it, or you’ve given a stick input. (P-term). Because the drone isn’t getting the reaction it expected it keeps upping the correction (I-term). At this point it’s almost impossible to figure out what it’s going to do. As long as the motor test works as expected, then don’t worry about arming on the bench. I know it’s fun to hear the motors zoom as you move it around, we’ve all done it, but it’s not telling you anything that the motor test won’t properly quantify.

so what should I do now

done motor test and everything is perfect

Use the Ardupilot methodic configurator software like we told you to do. And complete steps 4 to 18 before doing the first flight.

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ok I’ll try and let you know what happened