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Front and APM orientation

Posted by Kamil Rezac on October 16, 2010 at 1:38pm
Hi,
I'm just finishing my quad (wired up power lines and destroyed my receiver during tests today :( ) and have been looking how the IMU board should be oriented. I'm planning X configuration (to have free space for ultrasonic and camera on the front) and found some inconsistency. The comment in source code says "Frame orientation 45 deg to CCW, nose between two arms (front and right)". And according to the picture on the page http://code.google.com/p/arducopter/wiki/Quad_Frame_Assembly the nose is between front and left motor and IMU is heading to the left (CCW-rotating) motor. Why not to the front (CW-rotating) one? 

Wouldn't be better to keep motors-IMU relationship she same as in + configuration - IMU heading to the  front (CW-rotating) motor - to be able to switch between X and + just in software? Or am I missing something? 

Thanks and have a nice weekend.

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Replies

  • Leonardo Lisboa October 17, 2010 at 3:47am
    Great, thanks for the information, som mine is being mounted correctly.
  • Leonardo Lisboa October 16, 2010 at 3:28pm
    Hi, I'm now in doubt about mounting my APM...
    I'll fly it in + mode, so should I point my APM front to the front motor or should I put it 45 degrees CW to the front motor (between front and right motors)?
    Is the same APM positioning used for both + and X modes or is it different?

    Thank you,
    Leonardo
  • Sebastian Gralla October 16, 2010 at 1:48pm
    the picture in Frame assembly is wrong it's from the old code

    direction is, like you said, to the front motor (CW-rotating)
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