arduino move a ball - but how to hold, release and push it?

Using Arduino Motors, Mechanics, Power and CNC
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Hi to all,

To @MAS3: I read your comment and will follow it. I'll do as you suggested.

To @Paul_KD7HB: I'll try to check using a true magnet (hard to get, but solve several issues like heat and amperage.)

Many thanks to you all, for the ideas and support, you helped me a lot.

Edi