Pfaff hobbylock 788 Owner's Manual - Page 25

I Disengaging the upper knife Remove lint box 8. Open work support 1 2 and looper cover 1 0. If necessary, loosen upper knife arresting screw 37. Push rotary lever 27 of the axial upper knife guide fully to the right, hold it, and turn it forwards until the pin enga ges in the hole of the knife. Now the upper knife is disengaged. Adjusting the seam width The standard seam width setting is marked with N (3.5 mm). Disengage upper knife 11 according to the above description. The desired seam width is set with adjusting knob 26. The scale on the seam-width adjustment knob ranges from 3 to 5 mm. Set the upper knife at its basic position again and close the looper cover. When sewing thick materials, tighten screw 37 of the upper knife arresting system securely (see p. 32). Sew a test seam, Note: The seam width adjustments made at adjustment knob 26 (3 to 5 mm) only refer to the right needle. When the left needle is used the value set is increa sed by 2.2 mm (seam width 5.2 to 7.2 mm). 23