Hi Andrea,
Looking at the video of the Metaza that seems to be operating at (as near as I can tell) the same speed as my laser (1 second per line). Then how, I wonder, does it manage to fire all the dots per line that quickly ?.
Some alternatives to look at;
Have you tried drastically reducing the feedrate of the Mach plugin and seeing if you can get the pulses far enough apart to operate your magnet (I suspect that the Metaza magnet wire only travels a max of 0.025mm) ?
Can you redesign your magnet (reduce the mass) to make it faster ?
Tweakie.