![Crying or Very sad :cry:](./images/smilies/icon_cry.gif)
My question is pretty simple and I suppose the answer will be more simple, but one of things I see often in DIY cutterhead threads is the mantra that moving mass should be kept to a minimum. And yet, every design I see is made with 2 angled speaker drivers moving a lot of parts. What is the reason why electromagnets are never used in order to reduce moving mass to virtually nothing?
I am imagining a similar design to the usual one but with tiny neodymium magnets being moved by electromagnets. Moving mass would be little more than the cutting stylus, at least tiny compared to moving speaker drivers, cones on top, and so on.
I was more intrigued after trying to find an answer here and learning that old mono cutterheads used to work with electromagnets (I think, as I am not exactly sure how they worked). I have spent a couple of days trying to avoid asking this question but I can't find figure it out.
So apologies, I suspect it's like asking why we don't use square wheels.