Post History
#3: Post edited
by
re89j
·
2022-10-07T02:38:25Z (about 2 years ago)
- After I wrote up the question, I think the answer just hit me.
- Calculate the area of three circles: (was going to say cylindars, but I don't think that axis matters)
- a) the minimum/empty diameter
- b) the maximum/full diameter
- c) the current media diameter
- Then:
- b-a = the starting area of media
- c-a = current area of media
- current area / starting area = % remaining.
- For an 8 inch diameter spool with a 4 inch core:
- 
- After I wrote up the question, I think the answer just hit me.
- Calculate the area of three circles: (was going to say cylindars, but I don't think that axis matters)
- a) the minimum/empty diameter
- b) the maximum/full diameter
- c) the current media diameter
- Then:
- b-a = the starting area of media
- c-a = current area of media
- current area / starting area = % remaining.
- For an 8 inch diameter spool with a 4 inch core:
- 
- The smaller the core, the more pronounced the curve. If the core is 1000 inches, then it looks almost straight, as I'd expect.
#2: Post edited
by
re89j
·
2022-10-07T02:36:54Z (about 2 years ago)
Added Graph
- After I wrote up the question, I think the answer just hit me.
- Calculate the area of three circles: (was going to say cylindars, but I don't think that axis matters)
- a) the minimum/empty diameter
- b) the maximum/full diameter
- c) the current media diameter
- Then:
- b-a = the starting area of media
- c-a = current area of media
- current area / starting area = % remaining.
- After I wrote up the question, I think the answer just hit me.
- Calculate the area of three circles: (was going to say cylindars, but I don't think that axis matters)
- a) the minimum/empty diameter
- b) the maximum/full diameter
- c) the current media diameter
- Then:
- b-a = the starting area of media
- c-a = current area of media
- current area / starting area = % remaining.
- For an 8 inch diameter spool with a 4 inch core:
- 
#1: Initial revision
by
re89j
·
2022-10-06T23:55:54Z (about 2 years ago)
After I wrote up the question, I think the answer just hit me. Calculate the area of three circles: (was going to say cylindars, but I don't think that axis matters) a) the minimum/empty diameter b) the maximum/full diameter c) the current media diameter Then: b-a = the starting area of media c-a = current area of media current area / starting area = % remaining.