|
|
|
|
|
. |
| Figuring
out how much warp to put on each spool for sectional warping requires a
relatively complicated thought process but is, intrinsically, quite simple.
Having to go through the thought process all over each time we warp is
a not only nuisance but there is always the residual question in our minds
whether we did it right this time. So, to do it once and for all,
here is an algorithm for the calculation. What is needed is to put onto
each spool the yards of cloth desired plus loom waste times the number
of sections that will be used. An allowance must be made for the
waste involved in cutting and tying each section. The important thing
to remember is that the number of 'cloth lengths' on each spool is determined
by the number of sections; the number of spools is determined by the number
of ends per section; and the cutting waste is determined by the number
of times the warp will be cut an retied, that is the number of sections.
So,
let
An
example:
Note that as a check, the total number of yards (s x y) is the same. A further check is to calculate e x k x w which is the total length of warp required excluding cutting waste. In the example, this is 30 x 25 x 20 = 15,000 yards. This is to be compared to s x y, which for the examples is 30 x 510 = 60 x 255 = 15,300 yards. The 300 yard difference is the cutting waste allowance. We
deliberately make the cutting waste allowance quite generous, since there
is little more frustrating than winding on 19 sections and discovering
that you are two yards short on the 20th one. After all, 300 out
of 15,000 is only 2%.
|
|
|
|
|
|
|
|
|
|