Brother International BAS-341F Instruction Manual - English - Page 66

16.OPTION ■ Thread breakage detector ■ Needle cooler ■ OT Presser ■ Soft presser ■ Cassette presser ■ Play prevention work clamp ■ Thread wiper the side ■ Air wiper device ■ 2-step thread tension device Available as rotary type or fiber type, stops sewing when a thread breakage is detected and warns the operator. 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. Use according to particular sewing needs in order to provide an even clamping force. 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. 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. This work clamp prevents any play from occurring in the clamp. Wipes the upper thread away to the side when an inner clamping device is being used. The thread wiper is driven by a pneumatic cylinder. Allows the upper thread tension to be switched between two settings at any position desired by using the programmer. BAS-341F, 342F 59