Switchable Magnet | Strength Test

[tiger carpenter]

Thanks for your comments!
I measured the sandpaper gains of the lateral holding force, and it was only 15% improvement, so it's not exponential but worth doing anyway.

I think if we measured the forces while dragging, the friction = lateral holding force gains would be bigger (again not exponentially but few times, especially when comparing the slippery hockey ice platform like sliding on the skates to walking on ice with good grip shoes), but we are after that borderline / initial movement moment after which the magnet or fence moves. Once it moves, we consider it as a failure, because the accuracy of the cut depends on the immobilised setup.

So the sandpaper gave me 15% improvement, which is fair enough but I admit I was hoping it would be more than that.

PS
I will make an update video, when I add the sandpaper to the whole length of the magnetic fence's base (under the aluminum extrusion). Definitely it will help, but let's not be overly optimistic to avoid disappointment.