(57) In a warp let-ff control method performed by a let-off device of a loom, the loom
used for weaving a fabric (2a) having two or more weave sections with different densities,
the loom including the let-off device that controls an amount of warp let-off by performing
let-off control in which a let-off motor (5c) is driven in accordance with a detected
tension and a target tension, and a temple device (40) including a temple (41) that
is displaceable between an operating position and a standby position, the temple device
automatically switching a position of the temple between the two positions in accordance
with a weft density of one of the weave sections to be woven, the method includes
controlling driving of a let-off motor with a control mode during a control period
including a period during which the temple is displaced, the control mode adjusting
an amount of warp let-off in a direction such that a change in a warp tension due
to the displacement of the temple is cancelled out, the control mode being different
from a control mode for performing let-off control in a normal operation of the loom
after the control period.
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