Pfaff Hobby 1122 Service Manual
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Pfaff Hobby 1122 Service Manual

Pfaff Hobby 1122 Service Manual

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Summary of Contents for Pfaff Hobby 1122

  • Page 1 hobby 1122 - 1142 Service Manual...

  • Page 2: Table Of Contents

    Contents Foreword Notes on the sewing machine with regard to ambient conditions,treatment, cleaning and safety Removing the housing covers Face plate Base cover Front cover Rear cover Adjustment of the sideways movement of the needle in zigzag Adjustment of the play in worm gear Adjustment of the needle in center position Adjustment of the hook to needle clearance Adjustment of the timing of the hook in relation to the needle...

  • Page 3: Foreword

    Foreword The purpose of this service manual is to assist you in quick and correct repairing of the machines. Adjustments should only be made if the settings deviate from the requirements described herein. When checking or adjusting a machine, always proceed in the order of the worksteps prescribed. For easier reference every workstep is marked with a dot.

  • Page 4: Notes On The Sewing Machine With Regard To Ambient Conditions,Treatment, Cleaning And Safety

    6. To avoid the risk of electric shock, do not open the machine. There are no parts inside the machine which the user can repair. This is the exclusive responsibility of our qualified service staff. 7. Be sure to use only original PFAFF parts. 104 72 62-26...

  • Page 5: Removing The Housing Covers

    Removing the housing covers Face plate Face cover: 1. Remove cap (A). 2. Unscrew screw (B) of the face cover. 3. Remove face cover (C) . Base cover 1. Remove the six set screws (A) 2. Remove the base cover (B). To attach Shift the drop feed lever (C) in the direction of the arrow.

  • Page 6: Front Cover

    Front cover 1. Remove the face plate and base cover Pull out the pattern selector dial (A) and stitch length dial (B). Remove the setscrews (C), (D) and (E) (two off). Remove the front cover (F), unlocking all the hooks (H). To attach Follow the above procedure in reverse.

  • Page 7: Rear Cover

    Rear cover Remove the face plate, base cover and front cover. Remove the set screws (A), (B), (C) and (D). Lower the presser foot lifter (E) and pull away the rear cover from the machine, clearing the parts (1), (2) and (3), in this order. To attach Follow the above procedure in reverse.

  • Page 8: Adjustment Of The Sideways Movement Of The Needle In Zigzag

    Adjustment of the sideways movement of the needle in zigzag Requirement: For zigzag sewing the sideways movement of the needle must take place with the needle at a position higher than the maximum fabric thickness. Check The needle must begin its sideways movement when its point is approx. 2-3 mm above the needle plate. It must finish its sideways movement before it enters the fabric again Adjustment •...

  • Page 9: Adjustment Of The Play In Worm Gear

    Adjustment of the play in worm gear Requirement It is impossible to obtain an equally large play in one rotation of the gear wheel (C) , but it should be as small as possible at the tightest spot during the revolution. Check Rotate the gear wheel (C) back and forth and check the play.

  • Page 10: Adjustment Of The Needle In Center Position

    Adjustment of the needle in center position Requirement: When the machine is set for straight stitch position the needle must enter exactly in the center of the needle hole. At the for the widest zigzag stitch setting must be at the same distance from the left (G) and right side (H) of the needle slot Adjustment: •...

  • Page 11: Adjustment Of The Hook To Needle Clearance

    Adjustment of the hook to needle clearance Requirement: The standard clearance between the needle and hook point should be -0.10 to +0.05 mm. Check • Insert a new # 90 needle in the machine • Select the maximum width zigzag stitch ( •...

  • Page 12: Adjustment Of The Timing Of The Hook In Relation To The Needle

    Adjustment of the timing of the hook in relation to the needle Requirement: Set the machine on straight stitching. The needle (H) should travel 2,5 +-0,15 mm from its lowest position (D) before the tip of the hook (A) exactly meets the right side of the needle. Check •...
  • Page 13 Adjustment • Remove the stitch plate (B) and bobbin holder (C). • Select the straight stitch, so the needle comes to it's centre position. • Remove the base cover. • Loosen the 2 hexagon set screws (E) on the lower shaft gear (F). •...

  • Page 15: Adjustment Of The Needle Bar Height

    Adjustment of the needle bar height Requirement Set the machine on maximum zigzag width . When the needle from its lowest right hand position exactly meets the tip of the hook the distance between the upper edge of the needle eye (H) and the ring of the hook (H) should be 3,0 to 3,3 mm.

  • Page 16: Adjustment Of The Feed Dog Height

    Adjustment of the feed dog height Check When the feed dog is in it’s highest position. The Feed dog teath top (E) should be 0.75 to 0,9 mm from the surface of the needle plate (D). Adjustment • Select the machines longest stitch lenghts setting •...

  • Page 17: Adjustment Of The Presser Bar Height And Alignment

    Adjustment of the presser bar height and alignment Check When the presser foot (A) is raised, the distance between the zigzag foot (A) and stitch plate (B) should be 6.0 Adjustment • Remove the face cover. • Raise the zigzag foot. •...

  • Page 18: Adjustmet Of The Bobbin Thread Tension

    Adjustmet of the bobbin thread tension Check • Insert a full bobbin into the bobbin basket. • The thread tension spring of the bobbin basket shall give a resistance of 15 +- 2g when pulling the thread slowly. Adjustment Turn screw (A) until the correct thread tension is obtained. NOTE! Remove any loose pieces of thread or fluff from under the spring.

  • Page 19: Adjustment Of Needle Thread Tension

    Adjustment of needle thread tension Requirements: A correct interlacing of the needle and bobbin thread tension must be obtained, when the thread tension dial is set at "4", at straight stitching and zig-zag when sewing in cotton fabric with a polyester thread #50 (E). Check •...

  • Page 20: Adjusting Of The Zero Feed On The Buttonholes Bartack

    Adjusting of the zero feed on the buttonholes bartack Requirements When a button hole's bartack is selected there should be no feeding. Adjustment • Sew a buttonhole to check if the fabric is fed while sewing the bartacks. • Remove the cap (E). If the fabric is fed foward (A), turn the adjusting screw in the direction (C).

  • Page 21: Adjustment Of Buttonhole Feed Balance - The Colums

    Adjustment of buttonhole feed balance - The colums Requirements When sewing a buttonhole, the stitches on each side of the buttonhole should be the same density. Check • Select the bartrack on the Buttonhole indication • Attach the buttonhole foot (R). •...

  • Page 22: Adjustment Of The Buttonhole Length

    Adjustment of the buttonhole length Requirements A buttonhole sewn with the buttonhole foot (R) must be 3mm longer than the actual button. Check • With a button in the measurement slot, attach the special buttonhole foot (One-Step-Buttonhole) to the machine. •...

  • Page 23: Adjustment Of Equal Stitch Length For The Forward/Reverse-Controlled Utility Stitches - Stretch Stitch Balance (Model1142 And 1132)

    Adjustment of equal stitch length for the forward/reverse-controlled utility stitches - Stretch stitch balance (MODEL1142 and 1132) Requirements The forward feeding (A) and backward feeding (B) should be equal when sewing stretch stitch pattern. Check When a stretch stitch is sewn the forward feeding (A) and backward feeding (B) should be equal when sewing stretch stitch pattern.

  • Page 24: Replacing And Adjusting Threader (Model1142)

    Replacing and Adjusting Threader (MODEL1142) Replacing the needle threader • Remove the face plate • Pull the threader guard (A) away from the threader shaft. • Align the groove (H) on the threader guide with the pin (B) on the threader shaft and push the threader guide up to snap it in place.

  • Page 25: Replacing Motor And Adjusting Motor Belt Tension

    Replacing Motor and Adjusting Motor Belt Tension Removing the motor • Remove the face plate, base cover, front cover and rear cover. • Remove the setscrews (A) and machine socket (D). Remove the setscrews (B) and machine socket lid (E). •...
  • Page 26 Technische Änderungen vorbehalten Subject to alterations in design Sous toute réserve de modifications techniques Salvo modificaciones técniche Con riserva di modifiche tecniche Nr. 104 72 62-26 - englisch © 2005 Feb -Copyright VSM-Group AB All rights reserved.

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Hobby 1142

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