Re: [mowbot] Questions?

Dave Everett (deverett nospam at
Tue, 04 May 1999 08:50:42 +1000

At 09:33 03-05-99 -0700, david steinke wrote:
>The more I read about the compass, the bigger the problems I find. As an
>experiment, I took a standard compass and moved it withing 1 foot of my
>chasis with everything off. The compass went haywire depending on its
>location to the chasis. I turned everything on and the compass was still
>acting up. I don't see how an electronic compass would correct for this.
>I could shield my motors and wires and try again I guess.
The Vector modules have a calibration method, called 'Hard-Iron'. This
stores a magnetic map in the module of the current surrounding field
distortions so the unit can compensate. Unfortunately this is no good for
moving fields like motors.

Dave Everett

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