You can set the number of forward and reverse stitches for automatic reinforcement at the start and end of a stitch.

Whether you are reviving an old DDL-8700 that has been sitting in a warehouse or replacing a burnt-out unit on a production line, the SC-120 provides the silent, efficient, and precise power that modern sewing demands. When maintained properly—keeping it cool, clean, and surge-protected—this control box will likely outlast the machine it is attached to.

Good working condition. All functions tested: needle positioning works, speed is smooth across the full range, and the cooling fan runs quietly. Some cosmetic scuffs on the housing (see photos), but nothing affecting performance.

: You can set the maximum sewing speed in increments of 400 s.p.m. using fingertip controls on the panel. A conventional limit knob is also available for manual adjustments.