GVL 224 MagRez calibration issue

[Flying_Colander]

I think I may have sparked my MagRez sensor. I was hoping someone with a better sense of electronics might help.

 

I have the MagRez plugged into Leo Bodnar's BUx board as a slider. (I'm trying to make a DIY throttle.) I was holding the circular magnet near the sensor and rotating it in my fingers just to see if I could get a signal. The primitive Windows joystick calibrator detected a twitchy signal. As I was fiddling with the magnet, it touched the other sections of the sensor board. The USB connection dropped and Windows couldn't see it the device. When I re-plugged everything back in, the MagRez detected zero signal.

 

My question is have I shorted out the entire sensor board? Is there some other test I can run before dropping the sensor board into the hazardous waste bin? Should I be using another program to calibrate my throttle work?

 

 

 

 

[Sokol1]

Try calibrate contactless sensor in hands is not viable, even you breath disturb the calibration, to not say  hand tremors. ?

Magnet need by assembled in bearing supported axis for minimize play at minimum. 

[Flying_Colander]

Sokol,

 I know handmade doesn't mean calibrated by hand. ? That is impossible. I just wanted to see if what I was doing possible. Bodnar products do work with MagRez.

 

Now that I have had a good night's sleep and let the project rest, I am happy to report that I did not ruin the MagRez sensor though I don't know what my mistake was.

 

So the question remaining is: what is the best tool to help me calibrate a "Hall" type sensor?

 

Cheers,

Flying Colander

[Sokol1]

What I said about "manual calibration" is based on my own experience.... not good idea. ?

 

I think have read that MagRez is set for a given "effective electric angle", e.g. 60 degrees and will adjust automatically to magnetic field.

 

But DView, DXtweak2(64) are good options for fine calibration, set deadzone, saturation, just don't use the obsolete joy.cpl in Windows Games Controllers, that is the same thing since Win95.

 

Both available there: https://derekspearedesigns.com/technical-guide.html

 

For visual test of axis response, see axis resolution, use VKB JoyTester.

Edited February 1, 2021 by Sokol1

[dburne]

Does GVL not offer support?

[Flying_Colander]

Thanks, Sokol. I'll experiment with those programs you suggested.

 

Dburne, in my experience GVL does provide good support. I figured I'd ask the question publicly so others might benefit from the answers and my misadventures. Fellow DIYers could avoid what not to do. 

 

Cheers all.

[Sokol1]

Find this about "MagREZ" calibration, basically need set the center position of magnet field.

 

 

 

MagRez calibration.zip

[Flying_Colander]

Thanks so much, Sokol. This is very useful. I was trying to calibrate the throttle function at the end of the rotation not the MID POINT! I was starting at 0 or 100 instead of 50. Big help, mate.