Brother BAS-311F-L - Manual (Page 80)

15. OPTION
BAS-311F-0, 311F-L, 326F-0
73
Needle cooler device This is a pneumatic-type needle cooler which prevents the
thread breaking due to heat. It is particularly useful when
sewing thicker materials at high sewing speeds.
OT (One-touch) Presser Use according to particular sewing needs in order to
provide an even clamping force.
Soft presser At the first stage, the work clamp applies only a spring
force so that the material can be positioned. Then at the
second stage, air pressure provides a full clamping force.
Cassette presser This allows the operator to hold two clamps so that the
preparation for the next operation can be carried out while
sewing is in progress.
Overlapping operations are thus possible, which can
greatly boost productivity.
Play prevention work clamp This work clamp prevents any play from occurring in the
clamp.
Thread wiper, side type Wipes the upper thread away to the side when an inner
clamping device is being used.
Air wipper device The thread wiper is driven by a pneumatic cylinder.
2-step thread tension device Allows the upper thread tension to be switched between
two settings at any position desired by using the
programmer.
Thread take-up device After the thread is trimmed, an upper thread trailing length,
which is handy when sewing light materials where normal
trailing thread lengths can often lead to the thread pulling
out. (311F series: Solenoid type, 326F: Pneumatic type)
Automatic ejector When the reflective plate of the cassette is detected by the
sensor, the cassette is held automatically by a pneumatic
cylinder. In addition, the programs can be set so that the
cassette is ejected automatically.
* Refer to the separate Parts Book for details.