Roll works, pitch doesn't

In the pre flight instructions.

It says.

Roll the ArduCopter to the right. The right motor command should increase. The left motor command should decrease.

Pitch the ArduCopter down (the front motor should be lower in position than the rear motor). The front motor command should increase. The rear motor command should decrease.

When I have the APM planner up, and showing Action/AC2 Sensor/Motors.

If I roll the frame I can see the motors change speed accordingly to correct the roll.

But, when I pitch the frame, the front and rear motors (3&4) don't move one bit.

Also, when the frame is level, motor 2 runs higher than the others.

When I monitor the sensors, using Action/AC2 Sensor/sensors they all appear to be working correctly. I can clearly see the pitch changing.

Any clues on what to look at?

Thanks

Chuck June 2, 2011 at 2:11pm

Well tuning the motor controllers didn't do anything for me.

I did it manually. At least I know its done right.

I reloaded the code and went through the setup process again.

Its working fine now.

Stabilize roll and pitch Pid P values were 0.54 before and after the code reload.

Thanks for all your helps.
Developer

Jason Short June 1, 2011 at 6:33pm

Look at your PID values. I'll bet they are corrupted. probably the Pitch P value us 0.
Christopher Cooper June 1, 2011 at 4:28pm

Try running setup through the mission planner again. I had this problem yesterday after loading the code, no pitch response and the quad just wanted to yaw all the time. Running setup again fixed it.
luispez June 1, 2011 at 2:11pm

You should calibrate CES. I had today this problem. I have calibrate CES and it works ok.

This reply was deleted.

Discussions