Odd behavior on the motor test option in MP

Hi all,

This is my first post so please be gentle :)

I have recently replaced my multiwii board with a APM 2.5 and have had some setup problems

that I have unable to resolve.

Firstly the quad used to fly very well when using the multiwii board so I thought the upgrade would

be quite painless. However, I ran the motor test option just to check rotation etc and got quite a surprise.

The motors have been fitted as per the requirements and then connected to the board in the required order.

I noted the information about the motors and they would run up in a clockwise direction starting with motor 1 ( top right). Well for me this has not happened.

I have the motors installed from the top right clockwise 1,4,2,3. 1 and 2 CCW and 3 and 4 CW

The first motor to move was as expected motor 1 then clockwise to motor 4 then instead of motor 2 it went to 3 then finished with 2.

I have each motor connected in sequence 1 to 1, 2 to 2 etc..

They all rotate in the correct direction.

I have run up the quad, hand held and it is uncontrollable ( as I thought it would be).

I have also erased the eeprom and reloaded the software again just incase of corruption

Any ideas anybody

Thanks in anticipation

Hi Shyam.

Once again thanks for the replies.

Sorry about the confusion, but thanks for the help.

I will try again.

I have connected to the AMP on output pins 1 to 4 four motors directly to their respective ESC's.

On the inputs I have all the radio channels from the RCV 1 to 7.

I have a 3DR power module that supplies power to the APM.

I also have another board for power distribution only, which supplies all the motor ESC's.

I have a GPS module connected to the correct port

I have run the erase command

I have loaded the FW via the MP only

I have run through all the setup procedures many times and as such have become quite familiar with these ( much as I do not wish to!)

So in short a motors only connection with any item on the quad is with the APM output pins only ( excluding power )

With the motors connected in the manuals order it does not behave correctly. With 2 an 3 swapped ( in the wrong order ) it appears to do as you would expect.

So as far as I can see the only way the quad can fly correctly is by connecting the motors 2 and 3 to the incorrect output pins of the APM. Surely this must be wrong?

Replies

Mike Sturgeon July 28, 2013 at 8:17am

Hi Shyam.

Once again thanks for the replies.

Sorry about the confusion, but thanks for the help.

I will try again.

I have connected to the AMP on output pins 1 to 4 four motors directly to their respective ESC's.

On the inputs I have all the radio channels from the RCV 1 to 7.

I have a 3DR power module that supplies power to the APM.

I also have another board for power distribution only, which supplies all the motor ESC's.

I have a GPS module connected to the correct port

I have run the erase command

I have loaded the FW via the MP only

I have run through all the setup procedures many times and as such have become quite familiar with these ( much as I do not wish to!)

So in short a motors only connection with any item on the quad is with the APM output pins only ( excluding power )

With the motors connected in the manuals order it does not behave correctly. With 2 an 3 swapped ( in the wrong order ) it appears to do as you would expect.

So as far as I can see the only way the quad can fly correctly is by connecting the motors 2 and 3 to the incorrect output pins of the APM. Surely this must be wrong?
Shyam Balasubramanian July 27, 2013 at 2:16pm

Hi,

But what is the problem? Did you fly outside?

This reply was deleted.

ArduCopter User Group

Replies