Knitting technology, Third Edition

21.12
The double-cylinder slider butt set-out
If a broad rib set-out is used whose repeat is not an exact factor of the total cylin-
der tricks, the extra non-standard rib panels must be carefully arranged to balance
at the heel centre (back of the leg) so that they are less noticeable. It may also be
necessary for the foot bottom to be slightly less or slightly more than half the cylin-
der tricks, in order to balance the rib panels on either side of the foot.
As previously mentioned (Section 7.5.1), sliders have a needle 
knitting butt
towards their head and a needle 
transfer butt
towards their tail. Generally, the knit-
ting butts are long in the instep half (these are raised out of action during recipro-
cation) and short in the heel half, in both cylinders.
When arranging the transfer butts it is necessary to understand that the 
transfer
bolt cams
are gradually introduced in stages so that the longest butts will be used
for the first transfer actions, whilst the shortest butts will be unaffected until the cam
is fully in action for the last required transfer.
The 1 
¥
1 rib top arrangement is obtained by transferring up alternate needles
using alternate long butts in the bottom cylinder. When a broad rib leg is required,
a second up-transfer may be necessary using short butts on the bottom sliders. In a
minimum movement only the necessary needles will be transferred up, whereas with
a links-links movement all needles are transferred up. The broad rib wales are
achieved by transferring down using long top cylinder butts. Medium butts are used

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The manufacture of hosiery on small-diameter circular machines
265
to transfer down for the heel. Later, short butts are used to transfer down the instep
needles still in the top, in order to finish by knitting the toe in plain.