Dürkopp Adler 767 Operating Instructions Manual

Also see for 767 -: Instructions Instructions Instructions Installation instructions

5.7 Sewing-foot strokeThe height of the sewing-foot stroke is set with adjusting wheel 1.Machines without FA (without Thread Trimmer)On these machines the speed of rotation is not checked.Please comply with the note and table below.Machines with FA (with Thread Trimmer)The sewing-foot stroke and stitch rate are interdependent. A potentiometer is linkedmechanically with the adjusting wheel 1. By means of this potentiometer the control unitdetects which foot-stroke has been set and restricts the speed accordingly.Machines with HP 13 - 7 (Speedomat)The maximum stroke can be activated while sewing is in progress with the knee switch 2.Like machines with FA, these machines also have a potentiometer.Adjusting the sewing-foot stroke– Set adjusting wheel 1. Min. , A , B , C , D , E , F , max.min. = minimum strokemax. = maximum strokeNOTEIn order to ensure maximum durability and safety in operation, the maximum stitch ratesgiven in the table below should not be exceeded.Stitch-length range Adjusting Subclass Max. stitch ratemm wheel item stitches/min(mm foot stroke)0 - 6 min. - B -VF-373 / VF-573 3 000(up to 2 mm) -AE-73 / AE-5-73 2 800-FAS-473 3 200-FAS-573 3 200-all others 3 200 (3 500) 1)C - D -VF-373 / VF-573 2 500(2 - 5 mm) -AE 73 / VF-5-73 2 300-all others 2 700 (3 000) 1)E - max all 2 000(5 - 7 mm)6 - 9 min - max all 2 000(1 - 7 mm)1) On machines with the speedomat HP 13 - 7 the stitch rate may be increased byabout 300 stitches/min to the figures in brackets.The HP 13 - 7 is described in detail on page 36.17GB