If you were going to design the ideal coin sorter, here's what it would do.
1. It would be hooked up to a computer with a database of coins. 2. It would magnify each coin and spin it into a set position based on the front or back of the coin. i.e. Lincoln's head at the top. 3. It would send an electrical pulse thru the coin to determine the composition. 4. It would weigh the coin. 5. It would scan each side of the coin and determine the actual coin type and grade it. 6. It would determine if the coin was an error coin due to double strike or other items. 7. It would then send it down various sections for bagging or further processing, based on how you wanted to do things. There would be at least 10 sections you could send the coin down. 8. It would handle multiple coin sizes. 9. It would determine the value of any keeper coins based on the database. 10. It would provide count numbers for each coin category you had set up. 11. It wouldn't get jammed with bent or foreign coins. 12. It would do all of this in a split second. 13. It would have a large hopper for holding the coins to be sorted. 14. It would cost less than a Ryedale Apprentice.
It will happen some day. Most of the technology is already available. The demand is also there.
Right now the closest thing we have is the Ryedale sorters, which isn't bad.
It wouldn't need to spin the coin (such a device would be difficult and expensive) Sorting would be done by pattern recognition as compared to a database.
If your percentages are low.. just sort more. If your percentages are high.. just sort more.
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