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<p>[QUOTE=&quot;Ordinary Fool, post: 2673825, member: 85318&quot;]You can reference Z,0(a) in several different ways. Anvil or reverse die&#039;s lower-most point could be Z,0. If so, the center of the coin would be Z,1/2(a) coin&#039;s thickness, with the moving hammer die&#039;s &quot;zero point&quot; being Z,1(a).</p><p><br /></p><p>Or the integers can be negative and positive except for zero, of course.</p><p><br /></p><p>Or they can all be negative integers, even zero. It just depends on where you reference your zero datum point and set it.</p><p><br /></p><p>For example, if the center of the planchet is Z,0(a), the thickest point of the coin&#039;s reverse (be it the rim or it&#039;s most raised relief) would be Z,-1/2(a).</p><p><br /></p><p>Conversely, the obverse&#039;s same would be Z,1/2(a).</p><p><br /></p><p>a= the overall thickness in whatever units of measure are referenced to the dimensions taken from the blueprint.[/QUOTE]</p><p><br /></p>

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