VWBEAMER has ordered a Penny Miser. I hope he reports on it, but according to their website, Penny Misers take three weeks for delivery. I'm looking forward to ordering one myself unless VWBEAMER reports bad news. Another poster recently reported problems in getting his adjusted correctly. The Penny Miser site claims accuracy of 98%, which sounds high until you realize that 98% accuracy means an entire roll of lost coppers, or a roll of zinc contaminating your coppers. (Or both?)
If you want high speed, it sounds as though the high-end Ryedale is your machine. The low-end unit uses a Chinese comparitor that some of us find difficult to live with. (There's one entire thread on the Chinese comparitor.) I don't know how Ryedale's version stacks up against the others--I haven't used either of Ryedale's products.
I have used the Chinese comparitors. In one I have a zinc planchet, and I'm able to get some pretty clean batches of zinc. Problem is, a lot of zinc gets rejected, too, along with all the copper. (Well, almost all of it.) All those rejected coins drop into a second comparitor containing a copper penny, but it does a really crummy job of sorting. I've tried several different sample coins.
Separating by weight seems to make sense. At fifty bucks for a kit, it would be easy to add a second or third unit when one needed to scale up their operation. Here's a cute homemade version:
http://www.youtube.com/watch?v=CCk_wuxaEvs And a more intriguing variation:
http://www.youtube.com/watch?v=OC8ABm2T ... re=relatedSomebody has a very short youtube clip showing a sorter using an electromagnet.
http://www.youtube.com/watch?v=33KWuS3U ... re=related There are several copper/magnet clips on youtube, which may be an idea worth playing with. Heck, I thought only iron products were magnetic.
http://www.youtube.com/watch?v=pcVG6c_OvYU&NR=1 http://www.youtube.com/watch?v=KXNELXRa ... ature=fvwpIf you do invest in a Penny Miser, please let us know how it works.