2017-09-02, 10:38 AM
(2017-09-02, 10:08 AM)Littlechay Wrote: I have just completed a trip, Tahiti to Fiji, using my plotter based on Openplotter. I built a fairly traditional plotter in an IP67 box with touch screen etc. and mounted it with sticky backed velcro strips on the steel coach roof, under the hard dodger. The IMU is currently mounted in the IP67 box which means that I have to be careful of the orientation of the plotter if I move it from inside to out. I'll be modifying it now to put the IMU in its own housing that I can more or less permanently mount somewhere remote from the plotter so that it is immune to the orientation/location of the actual plotter.
That's the background. In actual use the IMU worked, and calibrated, just fine wherever I put it. As it is in the top of the box it is never closer to the steel than about 100mm.
I had other issues with the IMU failing to run for more than about 8 hours continuously but I need to write a proper post on that separately.
Thanks, always nice to hear of others experiences.
I'm surprised with the accuracy after playing with a MPU9250 down below on a steel boat, harder to find an accurate landmark to compare it to with a boat anchored.
Been running for days now non stop with no issues.