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Spirit FBL system Spirit FBL System Discussion


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Old 08-13-2018, 05:20 PM   #1 (permalink)
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Default GeoLink Compass Calibration

Here is another attempt to explain how to efficiently perform the GeoLink Compass Calibration. This goes very quickly and easily, even for my 6.5kg Goblin 700.

Stand facing to the west and hold the model upright in front of you with the front of the model toward the north. Picture a sphere under the bottom of the GeoLink. Move the model and visualize using the bottom of the GeoLink to paint the top of the sphere, keeping the longitudinal (roll) axis of the model roughly in a northern vertical plane. Paint around the sphere working from the top down to around the middle of the sphere. This should not take more than a minute or so.

At first, painting around the top of the sphere, the model is pointed mostly to the north, but as you move down to the center of the sphere, the model would be moved so it pointed up at the back of the sphere, and down at the front of the sphere, as you keep the roll axis along the vertical plane. Around the center of the sphere the roll axis would point north on one side, then up at the back, then north on the other side, then down at the front, as you move around the center of the sphere.

Now, turn the model over and visualize painting the bottom of the sphere. Paint around the sphere working from the bottom up to around the middle of the sphere. Again, this should take a minute. Now check the GeoLink LED to see if the calibration completed. The compass calibration completes very quickly and easily doing this.

I doubt that the orientation of the model is critical when you do this as long as you paint the entire surface of the sphere with the bottom of the GeoLink.

Please, someone make a video and post it. I have never tried to post a video on-line.
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Last edited by FrankFuss; 08-13-2018 at 05:30 PM..
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Old 08-25-2018, 07:06 PM   #2 (permalink)
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Originally Posted by FrankFuss View Post
Here is another attempt to explain how to efficiently perform the GeoLink Compass Calibration. This goes very quickly and easily, even for my 6.5kg Goblin 700.

Stand facing to the west and hold the model upright in front of you with the front of the model toward the north. Picture a sphere under the bottom of the GeoLink. Move the model and visualize using the bottom of the GeoLink to paint the top of the sphere, keeping the longitudinal (roll) axis of the model roughly in a northern vertical plane. Paint around the sphere working from the top down to around the middle of the sphere. This should not take more than a minute or so.

At first, painting around the top of the sphere, the model is pointed mostly to the north, but as you move down to the center of the sphere, the model would be moved so it pointed up at the back of the sphere, and down at the front of the sphere, as you keep the roll axis along the vertical plane. Around the center of the sphere the roll axis would point north on one side, then up at the back, then north on the other side, then down at the front, as you move around the center of the sphere.

Now, turn the model over and visualize painting the bottom of the sphere. Paint around the sphere working from the bottom up to around the middle of the sphere. Again, this should take a minute. Now check the GeoLink LED to see if the calibration completed. The compass calibration completes very quickly and easily doing this.

I doubt that the orientation of the model is critical when you do this as long as you paint the entire surface of the sphere with the bottom of the GeoLink.

Please, someone make a video and post it. I have never tried to post a video on-line.
Yes a video of this would be great, I am having some problems calibrating and would love to see it instead of reading it.
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Old 08-26-2018, 02:01 PM   #3 (permalink)
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Yes a video of this would be great, I am having some problems calibrating and would love to see it instead of reading it.
I will try to put together a video this next week.
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Old 08-26-2018, 04:32 PM   #4 (permalink)
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Couldn't you just do this to the sensor alone? Then mount the sensor. The sensor has no idea how it is mounted on the vehicle it just needs to be swept through the range.

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Old 08-26-2018, 05:27 PM   #5 (permalink)
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Couldn't you just do this to the sensor alone? Then mount the sensor. The sensor has no idea how it is mounted on the vehicle it just needs to be swept through the range.

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It does not matter how you do it as long as it gets calibrated out in the open away from objects that can affect the earth's magnetic field.
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Old 08-26-2018, 06:28 PM   #6 (permalink)
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Thanks guys, dismounted the Geolink and was able to get the compass calibration completed. Your posts were very helpful. Thanks.

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Old 08-27-2018, 12:34 AM   #7 (permalink)
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I also could not get the compass calibration to work on the model. So removed it from the boom and took the whole model outside and just keept moving the geolink around until a steady rate blue flashing led was present on the geolink. I don't think this is well explained in the instructions (about signal from the led) and this leads to thinking the calibration is complete, when it is not.

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Old 08-27-2018, 03:26 AM   #8 (permalink)
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I also could not get the compass calibration to work on the model. So removed it from the boom and took the whole model outside and just keept moving the geolink around until a steady rate blue flashing led was present on the geolink. I don't think this is well explained in the instructions (about signal from the led) and this leads to thinking the calibration is complete, when it is not.

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Could you explain a little more how you did it and fill in some of the gaps in the explanation - I 'm going to do it shortly and still unsure of the details.
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Old 08-29-2018, 12:26 PM   #9 (permalink)
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I figured it out. For some reason, on the SET HOME channel, I had to move the Jeti's channel negative throw to -120 percent. At -100 percent, the Spirit blinks red constantly and there's no swash movement. The Windows software indicates it's working correctly, but obviously not. At -120, there's an immediate negative swash movement, a positive return about 2 seconds later, and the Spirit FBL gives a blink. The computer confirms the home position has changed.

Funny, all the positive throws work at 100 percent in the Jeti. I haven't checked the negative throw altitude hold, but I bet that may work the same.

Kind of strange, so I hope this helps somebody.

Dan
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Old 08-30-2018, 12:28 PM   #10 (permalink)
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Here is a video of me performing the GeoLink Compass Calibration.

GeoLink Compass Calibration (3 min 51 sec)
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Old 08-30-2018, 04:24 PM   #11 (permalink)
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Thanks Frank - that really helps
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Old 08-30-2018, 07:23 PM   #12 (permalink)
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Thank you very much for this video, I really appreciate your effort
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Old 08-30-2018, 11:41 PM   #13 (permalink)
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When I get my back ordered Geolink this will help a lot. The vision I had in my head from the written word is nothing like this.

thanks for posting.
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Old 08-31-2018, 08:35 AM   #14 (permalink)
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Thank you for the video Frank!
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Old 08-31-2018, 09:29 PM   #15 (permalink)
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Frank, thanks for the video, it really helped me understand what was written in the post. This was the hardest part of setting up the Geolink and you have now helped to make it much easier, even when mounted on a large goblin.

Regards
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Old 09-04-2018, 12:36 PM   #16 (permalink)
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My neighbors already think I'm crazy....this isn't going to help that situation! Thanks for the vid, like the others said, that makes complete sense but it is not what I was imagining.
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Old 09-04-2018, 01:01 PM   #17 (permalink)
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My neighbors already think I'm crazy....this isn't going to help that situation! Thanks for the vid, like the others said, that makes complete sense but it is not what I was imagining.
Do the calibration at the flying field where you are away from any obstacle that might influence the magnetic field, and the neighbors .
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Old 09-04-2018, 04:27 PM   #18 (permalink)
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lol

I try to hide my heli from the neighbours when I put it in or take it out of the car.

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