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Tim's Rudimentary
Treadle Reducer |
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The second screen of the Treadle
Reducer begins by echoing the data you just gave it. Because you may
later want to come back to this screen and vary the number of treadles
for which you want a skeleton tie-up, that field is a text-box that
you can change.
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Click the check-boxes below to form the original tie-up.
As usual in these diagrams, horizontal rows represent shafts,
and vertical columns represent treadles.
The diagram begins with no ties. Click buttons to designate ties.
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You are then given an array of checkboxes of the
appropriate size to use to form the original tie-up. If this array isn't the
right size, then hit the "Back" button on your browser and make sure you put
in the correct sizes on the previous screen.
(This only works in the real program, not in this tutorial. Here,
clicking different boxes doesn't actually change anything.)
Assuming the grid is the right size, check the boxes to form the original
tie-up. Initially, no boxes are checked, corresponding a tie-up with no
ties. Click the boxes to indicate where the ties are. Here, I've
checked the boxes to match the original tie-up,
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For many tie-ups, a reduction can be found in a second or two.
On the other hand, for complicated tie-ups, and particularly in
cases where no reduction to fewer treadles exists, the search
can take minutes, hours, or, in theory, years. (This is why
you're using a computer instead of doing it by hand, right?)
As soon as a reduction is found, we'll quit and tell you.
If we don't find a quick solution, what's the longest time
you're willing to wait for an answer while we keep looking?
I'm willing to give up after waiting
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The actual calculations will happen on our server (a
fairly ordinary Intel box running FreeBSD), not on your computer. These
calculations can be very quick, but they can also take a long time. You are
next asked to specify how long you're willing to wait, at maximum. If you
specify, say, 2 minutes and the calculation gets done in 1 second, then
you'll get the result and be able to move on in 1 second. If you specify too
short a time and get timed out, you can always try again with a longer time
limit, but the calculation will start over each time. |
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Find Reduction |
You would then click on Find
Reduction Do this now to keep going in the tutorial, or hit the
Back button on your browser to go back.
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