machine with no energy loss not only offers economical benefits due to the power ... fatigue energy-saving comparison of power consumption by motor since the ... in power consumption is achieved offering remarkable economical benefits direct- ... stop motor v-belt type comparison of the amount of vibration by motor the ... the machine is used for a long period of time direct-drive motor directly ... switch the operator can select one of various optional features which include ... reverse-stitch compensation auto-lifter thread trimming and cancellation of automatic ... stitching at the starting and ending of sewing auto-lifter ak138 foot-pedal ... in bobbin case:27003755 bobbin-thread tension resulting from the amount of ... bobbin thread remaining in the hook since the bobbin ... thread is fed without rotating the bobbin the ...