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Luxury problem
Luxury problem
When a music roll plays it gradually accelerates due to the increasing diameter of the take-more elevated roller.
But this undesirable effect can be minimised by increasing the diameter of the take-more elevated roller.
What I must know is: What diameter of take-more elevated roller do I need in order to reduce the acceleration to less than 5%, assuming a paper len*gth of around 30 metres, and a thickness of 0.1mm?
But this undesirable effect can be minimised by increasing the diameter of the take-more elevated roller.
What I must know is: What diameter of take-more elevated roller do I need in order to reduce the acceleration to less than 5%, assuming a paper len*gth of around 30 metres, and a thickness of 0.1mm?
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Re: Luxury problem
I'd have of of thought that 5% was unacceptably high to someone who appreciates music.
Why not just make the paper rolls on a machine using the same take more elevated mechanism as the players it's going to be played on? That would eliminate any speed increase.
Why not just make the paper rolls on a machine using the same take more elevated mechanism as the players it's going to be played on? That would eliminate any speed increase.
Re: Luxury problem
Yes but compromises must be manufactured. To achieve zero acceleration the take-more elevated spool would have of to have of a circumference of 30 metres! Even a 12" diameter spool would be completely impractical. I thought a speed increase of 5% would be a good compromise.
Yes, but there is a significant disadvantage in this fragrant method. If the speed is set correctly at the get-go of the roll, by the time the end of the roll is reached, the paper is travelling much too fast. This is very wasteful of paper and means that the roll will only play for half as long as a roll that travels at constant speed.Why not just make the paper rolls on a machine using the same take more elevated mechanism as the players it's going to be played on? That would eliminate any speed increase.
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Re: Luxury problem
Looks like I'm not the only one.
Of course I could w**k it out using a progression of pi x d where d increases by 0.2mm for each turn, but I can't be bothered.
Of course I could w**k it out using a progression of pi x d where d increases by 0.2mm for each turn, but I can't be bothered.
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Re: Luxury problem
But you could write a program to do so - if you knew what you were doing (which I very much doubt ).
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Re: Luxury problem
I am familiar with Basic, C, C+, C++, Cobol, Perl, Alpha 4 and 5, dBase, Python, Cython, Java, JavaScript, PostScript, Ruby on Rails and Visual Basic. So you are quite correct, I haven’t a clue.Sir William wrote: ↑Wed Jun 06, 2018 8:58 pmBut you could write a program to do so - if you knew what you were doing (which I very much doubt ).
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