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 Replies: 19 / Views: 2,635 |
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Pillar of the Community
United States
3640 Posts |
It is called "Die Axis Rotation"
For most collectible coins the degree of rotation (between obverse and reverse) should be a minimum of 90 degrees. 180 degrees is the big one.
Not that some people may be interested in a lesser rotation, say 45 or so. Being that most coins are round that makes an easy template for 360
degrees. Find the northern center point of the obverse (coins differ some naturally as to that location exactly) Make a true north to south line and then figure your degree of rotaion compared to the reverse.
You can use a template or a compass also to find it. Some align the coin the best they can in a coin flip and then you can just flip the coin over and see the difference and measure it. I'm sure others will chime in with their own ideas etc.
Hope that helps some.
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Pillar of the Community
United States
4846 Posts |
you may want to keep this one in you're records, it's pretty common to find (depending on what you mean)
a MAD(misaligned die) where one side is centered and the other is not(common error, easy to spot, easy to attribute)
an Off-center strike is where both sides are "cut off" the coin
(less common error, really easy to spot, really easy to attribute)
and a rotated die is when the obverse or reverse is not in the proper alignment (coin alignment or medal alignment) than normal
(harder to spot[only hard because of the pictures needed], harder to spot, harder to attribute)
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Valued Member
 United States
465 Posts |
See,this is the can of worms,,sorry scooby,I ment rotated,,what is the best way to mark,measure,or determine,the degree of a rotated die strike,,thanks for everyones tolerance,,it gets a little misaligned in MY head sometimes
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Valued Member
United States
465 Posts |
Die axis rotation,,thank you,,,I will keep that on file,,and like you said,it varies with coin denominations,thanks again
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Pillar of the Community
United States
4000 Posts |
LOL - I just wanted to make sure you didn't have an off-center rotated die and cue the fruit! Just put it in a 2x2 as straight up and down as you can, then flip it end over from a N-S direction, then take pictures.  |
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Pillar of the Community
United States
7629 Posts |
I always found Scooby's suggestion to be the best for me - use a flip or 2x2.
Because I use a "stick" to search coins, if I put them all on the "stick" in the same alignment, when I flip the whole thing over, anything out of alignment will show up - it will be the one not facing the same way as all the rest.
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Valued Member
United States
465 Posts |
I was going to ask if there was such a creature,really,,I deleted the question,,
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Valued Member
United States
302 Posts |
I apologize rh13 I didnt mean to be rude.
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Valued Member
United States
465 Posts |
Well,,there was a 3 page thread on your cent that covered alot of what I was asking,,but it is good,,now I dont have to come and put white-out on all your 2x2s,,,,imagine that,,thanks,,rh13
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Valued Member
United States
302 Posts |
Then I would just put them in different 2x2s . |
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Valued Member
United States
424 Posts |
 You could get out your old grade-school protractor and measure the angle that way. Or, give it a good guesstimate, most rotated dies are rounded up. You rarely hear a 14 degree rotation. |
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Pillar of the Community
United States
2739 Posts |
The accepted term is "rotated die error". Either the hammer die or the anvil die can rotate.
As far as misalignments go, you have horizontal misalignments (the usual kind) and vertical misalignments (tilted die errors). Major horizontal misalignments are generally restricted to the hammer die. But once in awhile, you do have major misalignments of the anvil die. These coins are always broadstruck, because you need the collar to break apart or to travel sideways, carrying the anvil die with it. Vertical misalignments are sometimes coupled with horizontal misalignments, especially when the former are severe. Vertical misalignments can be as severe as 45 degrees of tilt, although they're typically much shallower.
Error coin writer and researcher.
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Valued Member
United States
307 Posts |
We were discussing rotating die errors in coins. If you notice something different without looking really for the fault consider it a premium coin. If the VAM'S create a furor a rotating die error that much more. |
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Pillar of the Community
United States
7629 Posts |
umm...HUH? Was that English?
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Valued Member
United States
465 Posts |
WOW,,I gotta print that off,,thats the can of worms again,,thanks,that will be a month worth of reading and research,,,,
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Posted 02/26/2011 12:20 am
