Brother International BAS-311F-L Instruction Manual - English - Page 80
OT One-touch Presser, Cassette presser
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Needle cooler device 15. OPTION 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. BAS-311F-0, 311F-L, 326F-0 73