7 Jul
2005
7 Jul
'05
6:25 p.m.
From: ard at p850ug1.demon.co.uk
Hi
I'm not sure how it works. The 10% number is not even
close. It is more like 0.5% or so. It does take up slack
over time. I think it has to do with the stretch of the
belt. There is more tention on one spool than the other,
making one side move a little faster than the other.
The one spool getting the more stretched belt would tend
to move a little faster than the side without stretch on
it since it would see more effective belt movement.
Dwight
The really ingenous part is that the belt attempts to rotate the take up
spool about 10% faster then the other spool. That's what tightens up the
tape if it ever gets slack.
How does that work? All points on the belt move with the same speed, the
belt drives the outside of the 2 spools, so the surface speed of the
spools must be the same. That's the tape speed. I don't see how it can
move the tape faster on the takeup side.
-tony
7 Jul
7 Jul
8:30 p.m.
On Thu, 7 Jul 2005, Dwight K. Elvey wrote:
I'm not sure how it works. The 10% number is not
even
close. It is more like 0.5% or so. It does take up slack
over time. I think it has to do with the stretch of the
belt. There is more tention on one spool than the other,
making one side move a little faster than the other.
The one spool getting the more stretched belt would tend
to move a little faster than the side without stretch on
it since it would see more effective belt movement.
I would think that the faster spindle has a smaller diameter than the
slower one.
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8:42 p.m.
On Thu, 7 Jul 2005, Dwight K. Elvey wrote:
Yes, but remember the belt drives the outide of the tape on the 2 spools.
Yes, the smaller spindle will turn quicker (more revs per second), but
to tension the tape you need to move the tape faster (more inches per
second) on the takeup side. And I still don't see why this happens.
-tony
I'm not sure how it works. The 10% number is
not even
close. It is more like 0.5% or so. It does take up slack
over time. I think it has to do with the stretch of the
belt. There is more tention on one spool than the other,
making one side move a little faster than the other.
The one spool getting the more stretched belt would tend
to move a little faster than the side without stretch on
it since it would see more effective belt movement.
I would think that the faster spindle has a smaller diameter than the
slower one.
6931
days inactive
6932
days old
2 comments
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