Need Help Calibrating ShotMarker

[Newhouse]

You may want to check if the sensors are square to each other also.

 

[Lynn313]

For calibration instructions check out “Johnny’s Reloading Bench” YouTube video on Shotmarker starting at ~ 23 minutes & 15 seconds.
F-Class John’s videos are helpful & appreciated, but if you are just starting with your personal shotmarker at your own range this video is easier to understand & help you get started. Good luck!

 

[rlporter507]

I have noticed that when its windy, shots upwind its gives me a point and downwind cheats me a point if its close to the line and further away from the center. Since there microphones, i figured this is the wind moving the sound. When i built my frame I made sure my mics were perfectly square and over all I'm only 2mm from being the same top to bottom to side by side. When i set it up I worked off the center lines and then checked corner to corner. I do place targets on the center line both ways. I have never had to do the calibration part, it was dead on first shots. Im wondering if the Op could have a puck that is not square, or a bit off on the actual measurements, or a bit off square? Or maybe some kind of echo? Just an idea of what to double check

 

[ChrisNZ]

...We run 14 ShotMarkers at the club and each of them has an offset dialed in. The reason is that continued X's and 10's actually hit the paper target low. That preserves the visual aiming point by putting the impacts lower than the X.

The other way to avoid destroying a definitive point of aim for F-ers is to have a ~1/3moa white aiming disc mounted say 2moa above the optical centre and starting with your elevation 2moa lower than normal. We have sling shooters in the Club who demand a true optical centre calibration so this approach doesn't affect them.

 

[SWRichmond]

Isn't it true that a larger target frame will give more accurate results, as having the sensors further apart gives greater differentiation of the sound waves' arrival time at the individual sensors? Consider it in the extremes.