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Mauser MA 1245 Adjustment Manual

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MA
1245
MA
1246
Adjustment Manual
4153-1-1245-3-2
Taicang 2012-02
© Tribonia Intl.

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Summary of Contents for Mauser MA 1245

  • Page 1 1245 1246 Adjustment Manual 4153-1-1245-3-2 Taicang 2012-02 © Tribonia Intl.
  • Page 2 215400 Taicang, Jiangsu...
  • Page 3 Index Contents ..................Page Adjustment ........................... 5 Notes on adjustment ......................5 Tools, gauges and other accessories for adjusting ............... 5 Abbreviations ......................... 5 Explanation of the symbols ....................5 Adjusting the basic machine ....................6 .05.01 Positioning the feed dog across the direction of sewing ............
  • Page 4 Index Contents ..................Page .06.10 Connecting rod (for MA 1246 only) ..................34 .06.11 Thread-catcher height ......................35 .06.12 Knife ............................ 36 .06.13 Thread catcher reverse position ......................37 .06.14 Bobbin-thread clamp spring ........................38 .06.15 Tension release bar ..........................40 Parameter settings ......................

  • Page 5: Adjustment

    If not otherwise stated, the machine must be disconnected from the electrical power supply. Danger of injury due to unintentional starting of the machine! The illustrations in this section show the MA 1245 single-needle machine. For the MA 1246 two-needle machine, various adjustments must be made twice, i.e.

  • Page 6: Adjusting The Basic Machine

    Adjustment Adjusting the basic machine Positioning the feed dog across the direction of sewing .05.01 Requirement The bottom feed dog must be the same distance from the left and right side of the need- le-plate cutout. Fig. 13 - 01 Loosen screws 1 and 2.

  • Page 7: Positioning The Feed Dog In The Direction Of Sewing

    Adjustment Positioning the feed dog in the direction of sewing .05.02 Requirement With the longest stitch set, the bottom feed dog must have the same clearance the front and the back with respect to the needle-plate cutout when feeding both forwards and backwards.

  • Page 8: Height Of The Bottom Feed-Dog

    Adjustment Height of the bottom feed-dog .05.03 Requirement With the stitch length set at "0", the bottom feed dog must protrude over the needle plate as high as the teeth when at TDC. Fig. 13 - 03 Set stitch length "0". Bring the bottom feed dog to its TDC by turning the handwheel.

  • Page 9: Pre-Adjusting The Needle Height

    Adjustment Pre-adjusting the needle height .05.04 Requirement With the needle bar at BDC, the distance between the needle bar and the needle plate must be 15 mm. Fig. 13 - 04 Move needle bar 1 (screw 2) in accordance with the requirement without moving it laterally.

  • Page 10: Centering The Needle In The Needle Hole

    Adjustment Centering the needle in the needle hole .05.05 Requirement With the stitch length set at "0", the needle must enter the needle hole exactly in the middle. Fig. 13 - 05 Unscrew vibrating presser 1 and presser foot 2. Set stitch length "0"...

  • Page 11: Lifting Motion Of The Bottom Feed-Dog 1

    Adjustment Lifting motion of the bottom feed-dog .05.06 (This adjustment does not apply for machines without a bottom feed lifting phase (without P) Requirement With the needle bar at its BDC, the bottom feed dog must be at its TDC. With the longest stitch set, the bottom feed dog must reach the top surface of the needle plate at the same time as the needle point when the handwheel is turned.

  • Page 12: Driving Motion Of The Bottom And Top Feeds

    Adjustment Driving motion of the bottom and top feeds .05.07 Requirement With the longest stitch length set and the needle bar at its BDC, the top and bottom feeds should not move when the reverse-feed lever is activated.. Fig. 13 - 7 Set the longest stitch.

  • Page 13: Hook-To-Needle Clearance, Needle Rise, Needle Height And Needle Guard

    Adjustment Hook-to-needle clearance, needle rise, needle height and needle guard .05.08 (On Model 1246 make these adjustments on both sewing hooks.) Requirement When the stitch length is set at " 3" and with the needle rise position set (see table): the hook point must be at "needle centre"...
  • Page 14 Adjustment Fig. 13 - 8 Move hook bearing 4 in accordance with requirement 1. Tighten screws 1. Position the hook point at the needle centre, taking care to ensure that the needle is not de ected by needle guard 5. While ensuring that bevel gear 6 is not too close, and that the hook does not have too much play, tighten screws 2.

  • Page 15: Top-Feed Stroke

    Adjustment Top-feed stroke .05.09 Requirement At the largest top-feed stroke setting and stitch length " 0", presser foot 1 and vibrating presser foot 2 must lift 7.0 mm from the needle plate when the handwheel is turned. Fig. 13 - 9 Set the largest top-feed stroke and the stitch length at "...

  • Page 16: Lifting Motion Of The Top Feed

    Adjustment Lifting motion of the top feed .05.10 Requirement When presser foot 1 is resting on the needle plate, the vibrating presser foot 4 and the point of the needle must both reach the needle plate at the same time when the top feed stroke is set at maximum.

  • Page 17: Bobbin-Case Opener

    Adjustment Bobbin-case opener .05.11 (On Model 1246 make these adjustments on both bobbin openers.) Requirement The needle thread must not be clamped between the bobbin-case opener 1 and the bob- bin-case base 3 nor may it be clamped between projection 4 and the retaining trip of the needle plate (see arrows).

  • Page 18: Safety Clutch

    Adjustment Safety clutch .05.12 The safety clutch is set by the manufacturer and screws 5 are sealed. If the thread jams, the safety clutch snaps out to prevent damage to the hook. A description of how to snap the clutch back in follows. Fig.

  • Page 19: Needle Thread Tension Release

    Adjustment Needle thread tension release .05.13 Requirement With the presser foot raised, both of the tension discs must be at least 0.5 mm apart. The clearance of 0.5 mm is a minimum and can increase to more than 1 mm when using thick threads.

  • Page 20: Thread Check Spring

    Adjustment Thread check spring .05.14 (on the MA 1245 and 1246 without thread trimmer -900/56) Requirement The movement of thread check spring 2 must be nished when the needle point enters the material (approx. 7 mm spring path). Due to technical reasons, the length of the thread-check spring path can vary a little in either direction.

  • Page 21: Thread Check Spring

    Adjustment Thread check spring .05.15 (on MA 1246 with thread trimmer -900/56) Requirement The motion of thread controller springs 1 and 6 should cease as soon as the needle point penetrates the material (= about 7 mm spring de ection). Due to technical reasons, the length of the thread-check spring path can vary a little in either direction.

  • Page 22: Bobbin Winder

    Adjustment Bobbin winder .05.16 Requirement With the bobbin winder switched on, the bobbin winder spindle must engage reliably. With the bobbin winder switched off, friction wheel 5 must not touch drive wheel 1. The bobbin winder must switch off automatically when the thread level is approxima- tely 1 mm from the edge of the bobbin.

  • Page 23: Presser-Foot Pressure

    Adjustment Presser-foot pressure .05.17 Requirement The material must be fed reliably even at top sewing-speed. There mustn’t be pressure marks on the material. Fig. 13 - 17 Turn screw 1 in accordance with the requirement.

  • Page 24: Adjusting The Thread Trimmer -900/56

    Adjustment Adjusting the thread trimmer -900/56 Pre-adjusting the control cam .06.01 Requirement The eccentric bearing-surface of control cam 5 must be laterally in the middle of pawl 8. With the take-up lever at its TDC, the beginning of the largest eccentricity of the bearing surface (in the direction of rotation) must be underneath the point of pawl 8.

  • Page 25: Tripping Lever

    Adjustment Tripping lever .06.02 Requirement In needle rise position, the attened pin of control lever 6 (see arrow) must fall slightly into the track of control cam 7 when activating lever 8 is activated. Fig. 13 - 19 Screw out screw 1 and swing out connecting rod 2. Loosen screws 3 and 4.

  • Page 26: Pawl

    Adjustment Pawl .06.03 Requirement With the cut-off mechanism in resting position, there must be a distance of 0.3 mm bet- ween the largest eccentricity of bearing surface 1 and pawl 2. Fig. 13 - 20 Position the largest eccentricity of bearing surface 1 underneath pawl 2 by turning the handwheel.

  • Page 27: Engaging Solenoid

    Adjustment Engaging solenoid .06.04 Requirement In needle rise position and with engaging solenoid 5 activated, there must be a distance of 0.3 mm between engaging lever 2 and pawl 3. Fig. 13 - 21 Bring the machine to needle rise position by turning the handwheel. Loosen screw 1 until the engaging solenoid can be turned with dif culty.

  • Page 28: Release Trip

    Adjustment Release trip .06.05 Requirement In needle rise position and with control lever 4 engaged, there must be a distance of ap- prox. 0.3 mm between the bolt of the control lever and the base of the cam track. Fig. 13 - 22 Bring the machine to needle rise position by turning the handwheel.

  • Page 29: Engaging Lever

    Adjustment Engaging lever .06.06 Requirement With the needle bar at TDC and with control lever 3 at starting position, there must be a dis- tance of approx. 0.3 mm between bolt 4 and the outer diameter of control cam 5. Fig.

  • Page 30: Linkage Rod

    Adjustment Linkage rod .06.07 Requirement When shaft 8 begins its pushing motion, lever 6 must simultaneously lift from stop 7 . Fig. 13 - 24 Af x ball joint 1 to control lever 3 using screw 2. Loosen nuts 4 (right and left handed thread). Bring the machine to needle rise position by turning the balance wheel and activate engaging lever 5.

  • Page 31: Final Adjustment Of The Control Cam

    Adjustment Final adjustment of the control cam .06.08 Requirement When control lever 3 is engaged and the needle point is 12 mm above the needle plate co- ming from its BDC, the motion of the thread catcher 5 must begin. Fig.
  • Page 32 Adjustment In this position, tighten the accessible screws on control cam 1. Make the remaining screws on control cam 1 accessible and tighten these as well.

  • Page 33: Catch

    Adjustment Catch .06.09 Requirement With the cut-off mechanism in resting position, there must be a distance of approx. 5 mm between catch 1 and control lever 6. Fig. 13 - 26 Lightly af x catch 1 and cover plate 2 using screws 3. Move catch 1 as far as possible in the direction of the arrow and then move it laterally in accordance with the requirement.
  • Page 34 Adjustment Connecting rod .06.10 (for MA 1246 only) Requirement When the cutting device is in the off-position, the length of spacer rod 4 should be equal to the distance between shafts 2 and 3. Fig. 13 - 27 Loosen nuts 1 (right- and left-hand thread) when the cutting device is in the off-position. Measure the distance between shafts 2 and 3.

  • Page 35: Thread-Catcher Height

    Adjustment Thread-catcher height .06.11 (On Model 1246 make these adjustments on both thread catchers.) Requirement When thread catcher 2 is pushed forwards manually with the take-up lever at its TDC, the lo- wer point of the thread catcher must pass 1 mm over the back of hook 4. Fig.

  • Page 36: Knife

    Adjustment Knife .06.12 (On Model 1246 make these adjustments on both knives.) Requirement The elongated hole of knife 3 must be parallel to knife carrier 5 and the knife must not be touching the casting (see arrow). When the point of needle catcher 4 protrudes approx. 3 mm over the cutting edge of the knife, knife 3 must just touch thread catcher 4.

  • Page 37: Thread Catcher Reverse Position

    Adjustment Thread catcher reverse position .06.13 (On Model 1246 make these adjustments on both thread catchers.) Requirement At the front point of reversal of thread catcher 3, its rear edge must be ush with the cut- ting edge of knife 4 (see arrow). Fig.

  • Page 38: Bobbin-Thread Clamp Spring

    Adjustment Bobbin-thread clamp spring .06.14 (On Model 1246 make these adjustments on both clamp springs.) Requirement Between clamp spring 5 and the bottom of thread catcher 4, there must be a distance of 0.3 mm. At the front point of reversal of thread catcher 4, the points of clamp spring 5 must be ush with the back edge of catcher 4 (see arrow).
  • Page 39 Adjustment Manually pivot thread catcher 4 over clamp spring 5. Bend clamp spring 5 in accordance with requirement 1. Hook spring 3 back in again. Bring the machine to needle rise position, activate the engaging lever and bring the thread catcher to its front point of reversal by turning the handwheel. Align clamp spring 5 (screws 6) in the elongated hole in accordance with requirement 2 - if necessary carrier 1 (screws 2) as well.

  • Page 40: Tension Release Bar

    Adjustment Tension release bar .06.15 Requirement With the cut-off mechanism in resting position and the presser foot raised, there must be a distance of approx. 7 mm between the left edge of release bar 8 and housing 9. When the point of thread catcher 5 is at the same height as the rear edge of stop trip 6 of the needle plate (see arrow) with the presser foot resting on the needle plate, the tension discs must be loosened to such an extent that the needle thread can be easily pulled through them.
  • Page 41 Adjustment Fig. 13 - 34 Allow the presser foot to rest on the needle plate. By continuing to turn the handwheel, position the point of thread catcher 5 at the same height as the edge of rear stop trip 6 of the needle plate and press release bar 8 to the left in accordance with requirement 2 using retaining collar 7.

  • Page 42: Parameter Settings

    Adjustment Parameter settings (only on machines with MA 40 ED Control Unit) The selection of the user level and the alteration of parameters is described in the sepa- rate instruction manual for the drive unit. Parameter list .07 .01 Needle position 0 (needle reference position) B, C 0 - 255 Needle position 1 (needle lowered)

  • Page 43: Circuit Diagrams

    Circuit diagrams Stromlaufpläne Circuit diagrams Reference list for the Circuit diagrams Control unit MA 40 ED Control panel BDF S2 Sewing head recognition system (OTE) Sewing lamp (optional) LED stitch counter Sewing motor Main switch Manual backtacking key S1.1 Pedal speed control unit Needle position change key Single stitch key Start inhibitor (E6 stop)
  • Page 44 Circuit diagram 91-191 502-92 Part 1...

  • Page 45: Circuit Diagram

    91-191 502-95 Circuit diagram Part 2 Version 07 .07 .06...
  • Page 46 Circuit diagram 91-191 502-92 Part 3...
  • Page 47 Notes...

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Ma 1246

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