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3806
-12/22
-12/23
ADJUSTMENT MANUAL
This instruction manual applies to
machines from the serial number 2 829 139 and
software version 0435/008 onwards
296-12-19 448/002
Justieranleitung engl. 04.2020

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Summary of Contents for Pfaff 3806-12/22

  • Page 1 3806 -12/22 -12/23 ADJUSTMENT MANUAL This instruction manual applies to machines from the serial number 2 829 139 and software version 0435/008 onwards 296-12-19 448/002 Justieranleitung engl. 04.2020...
  • Page 2 The reprinting, copying or translation of PFAFF AdJustment Manuals, whether in whole or in part, is only permitted with our previous authorization and with written reference to the sour- PFAFF Industriesysteme und Maschinen GmbH Hans-Geiger-Str. 12 - IG Nord D-67661 Kaiserslautern...
  • Page 3: Table Of Contents

    Inhaltsverzeichnis Inhalt ..................Seite Adjustment ........................... 5 Tools, gauges and other accessories for adjusting ............... 5 Abbreviations ......................... 5 Explanation of the symbols ....................5 Control and adjustment aids ....................6 Adjusting the basic machine ....................7 .05.01 Position of the needle in the needle hole ................7 .05.02 Preliminary adjustment of the needle height .................
  • Page 4: Inhalt

    Inhaltsverzeichnis Inhalt ..................Seite .05.29 Position of vibrating presser ....................37 .05.30 Eliminating differences in feed stroke lengths ..............38 .05.31 Pressure of vibrating presser and presser foot ..............39 Adjusting the top knife (chain cutter) ................40 .06.01 Agjusting the diagonal position of the knife quide ............... 40 .06.02 Adjusting the height of the top knife ...................
  • Page 5: Adjustment

    Adjustment Adjustment Please observe all notes from Chapter 1 Safety of the instruction manual! In particular care must be taken to see that all protective devices are refi tted properly after adjustment, see Chapter 1.06 Danger warnings of the instruc- tion manual! If not otherwise stated, the machine must be disconnected from the electrical power supply.
  • Page 6: Control And Adjustment Aids

    Adjustment Control and adjustment aids By adjusting the holes 1, 3 and 4 with the adjustment pin ( 5 mm) the required needle bar positions can be set exactly. Fig. 13 - 01  Turn the balance wheel until the needle by is approximately in the required postion. ...
  • Page 7: Adjusting The Basic Machine

    Adjustment Adjusting the basic machine Position of the needle in the needle hole .05.01 Requirement 1. The needle 6 must be centered in the needle hole in a crosswise direction. 2. The distance between needle 6 and the front edge of the needle plate must be ap- prox.
  • Page 8: Preliminary Adjustment Of The Needle Height

    Adjustment Preliminary adjustment of the needle height .05.02 Requirement With the needle bar at TDC (pin in hole 1) the needle point must be positioned 11 mm above the needle plate. Fig. 13 - 03  Bring the needle bar 1 to TDC. ...
  • Page 9: Zeroing The Bottom Feed (On Machines With Closed Gearcase)

    Adjustment Zeroing the bottom feed .05.03 (on machines with closed gearcase) Requirement With the stitch length set at "0", the feed dog must not move when the balance wheel is turned. Fig. 13 - 04  Set the stitch length adjusting lever 1 all the way down. ...
  • Page 10: Zeroing The Bottom Feed (On Machines With Open Gearcase)

    Adjustment Zeroing the bottom feed .05.04 (on machines with open gearcase) Requirement With the stitch length set at "0", the feed dog must not move when the balance wheel is turned. Fig. 13 - 05  Set the stitch length adjusting lever 1 all the way down. ...
  • Page 11: Driver Lever Under The Stitch Shift Key

    Adjustment Driver lever under the stitch shift key .05.05 Requirement With the largest stitch length setting, the stitch switch button 3 should be on when tapped have little play (approx. 0.3 mm). Fig. 13 - 06  Loosen screws 1 and 2. ...
  • Page 12: Feed Driving Motion

    Adjustment Feed driving motion .05.06 Requirement With the stitch length set at its maximum and the needle bar positioned 0.8 mm before TDC (pin in hole 4), the feed dog must not move when the reverse feed switch is operated. Fig.
  • Page 13: Feed Lifting Height

    Adjustment Feed lifting height .05.07 Requirement At maximum stitch length setting and in o.T. Needle bar (adjustment hole 1), the feed dog should stand in the middle of the throat plate cutout and lie against the setting gauge over its entire length. Fig.
  • Page 14: Feed Lifting Motion

    Adjustment Feed lifting motion .05.08 Requirement When the needle bar is at TDC, (pin in hole 1), the slot of eccentric 2 must be pointing vertically Fig. 13 - 09  Loosen screw 1.  Position needle bar appropriately.  Twist eccentric 2 according to the requirement and tighten accessible screw 1. ...
  • Page 15: Limiting The Stitch Length

    Adjustment Limiting the stitch length .05.09 Requirement 1. If the stitch changeover button 6 is pressed as far as it will go, the desired minimum stitch length of 1.5 mm should be set. 2. With the maximum stitch length setting, the feed dog must not bump into the stitch plate cutout.
  • Page 16 Adjustment Greiferausweichbewegung .05.10 Requirement With the needle bar at TDC (pin in hole 4), the slot in eccentric 2 must be positioned ex- actly under the center of the shaft. Fig. 13 - 11  Loosen screw 1.  Bring the needle bar into the appropriate position. ...
  • Page 17: Looper Avoiding Motion

    Adjustment Looper motion .05.11 Requirement When the needle bar reaches its bottom dead center (BDC), the looper must be at its right point of reversal. Fig. 13 - 12 Checking the exact right point of reversal:  Take needle system 4463 KKS size 80. ...
  • Page 18: Looper Height And Looper Angle

    2. the looper 7 surface of the looper with the thread groove should be at an angle of 4° to the imaginary centre line of the bedplate with needle size 90. Machine type Clearance ( x ) PFAFF 3806 0,5 mm 4° Fig. 13 - 13...
  • Page 19 Adjustment  Remove needle plate and bottom feed dog.  Place gauge 1 (Order No. 61-111 642-19) on the needle plate rest.  Place looper holder 2 in a vertical position.  Twist eccentric bearing stud 3 (screws 4 and 5) according to requirement 1. ...
  • Page 20: Looper-To-Needle Clearance In Sewing Direction

    Adjustment Looper-to-needle clearance in sewing direction .05.13 Requirement In sewing direction there must be a cleaance of approx. 0.1 mm between looper point and needle. 0,1 mm Fig. 13 - 14  Turn the balance wheel until the looper point coming from the right reaches the left side of the needle.
  • Page 21: Looper-To-Needle Clearance Crosswise To Sewing Direction

    Adjustment Looper-to-needle clearance crosswise to sewing direction .05.14 Requirement When the looper 1 is at its right point of reversal, there must be a clearance between the looper point crosswise to the sewing direction and the needle center of 3.6 mm. 3,2 mm Fig.
  • Page 22: Final Adjustment Of The Needle Height

    Adjustment Final adjustment of the needle height .05.15 Requirement When the point of the looper advancing from the right reaches the left side of the needle, the top edge of the needle eye must be 1.0 - 1.2 mm below the bottom edge of the looper. Fig.
  • Page 23: Height Of Rear Needle Guard

    Adjustment Height of rear needle guard .05.16 Requirement When the needle bar is at bottom dead center (pin in hole 3), the vertical surface of the needle guard 1 must cover about 2/3 of the needle eye. Fig. 13 - 17 ...
  • Page 24: Clearance Between Rear Needle Guard And Needle

    Adjustment Clearance between rear needle guard and needle .05.17 Requirement When the point of the looper, which is advancing from the right, reaches the right side of the needle, the needle guard 3 must still be in slight contact with the needle. Fig.
  • Page 25: Guard Of Looper-Avoiding-Motion Eccentric

    Adjustment Guard of looper-avoiding-motion eccentric .05.18 Requirement During motion the eccentric 3 must not touch guard 1. Fig. 13 - 20  Adjust guard 1 (screws 2, accessible through adjustment holes) according to the requirement.
  • Page 26: Take- Up Lever

    Adjustment Take- up lever .05.19 Requirement 1. When the needle bar is at BDC (pin in hole 3) there must be a clearance of about 0.3 mm between the take-up lever 2 and the needle bar frame 3. 2. The take-up lever 2 must be able to move freely in the center of the needle head slot, and must not have any contact either at TDC or BDC.
  • Page 27: Basic Setting Of The Needle Thread Regulator And The Thread Guide

    Adjustment Basic setting of the needle thread regulator and the thread guide .05.20 Requirement 1. With the needle bar at BDC (pin in hole 3) the eye of the needle thread regulator 1 and the adjustment hole of the take-up lever 4 must be in line. 2.
  • Page 28: Looper Thread Regulator And Looper Thread Take-Up

    Adjustment Looper thread regulator and looper thread take-up .05.21 Requirement 1. The distance between the front edge of looper thread regulator 1 and the rear needle plate edge guide must be 29 mm. 2. The front edges of the thread take-up device 3 and the thread regulator 1 must be about 8 mm apart.
  • Page 29: Looper Thread Puller

    Adjustment Looper thread puller .05.22 Requirement With the needle bar in top dead center (pin in hole 1) both eyes of looper thread puller 1 must be at the front edge of the thread take-up device 4. Fig. 13 - 24 ...
  • Page 30: Clearance Between Presser Foot And Needle Plate

    Adjustment Clearance between presser foot and needle plate .05.23 Requirement With the presser bar lifter 1 raised, there must be a clearance of 7 mm between the pres- ser foot and the needle plate. Fig. 13 - 25  Place the presser foot on the stitch plate using hand lever 1. ...
  • Page 31: Top Feed Actuating Link

    Adjustment .05.24 Top feed actuating link Requirement 1. All moving parts of the top feed must move freely but without any play. 2. The vibrating presser must not contact the lifting presser. Fig. 13 - 26  Lower the presser foot using lifting lever 1. ...
  • Page 32: Neutral Position Of Top Feed

    Adjustment .05.25 Neutral position of top feed Requirement With the stitch length and top feed set at "0" and with adjustment link 9 fi tted, drive lever 22 must not make any movement when the balance wheel is turned. Fig. 13 - 27 ...
  • Page 33 Adjustment  Set feed regulator levers 6, 7 and 8 at "0".  Fit adjustment link 9 onto pins 10.  Rotate the balance wheel and turn crank 11 (screw 12) so that the vibrating presser no longer moves.  Loosen nut 1. ...
  • Page 34: Feeding Motion Of The Top Feed Dog

    Adjustment .05.26 Feeding motion of the top feed dog Requirement When the needle bar is positioned 0.8 mm past t.d.c (adjustment hole 4) and the maximum stitch length is set, lever 3 should not move when the feed reverse key is operated. Fig.
  • Page 35: Vibrating Presser Clearance

    1.3 mm when the vibrating presser is operating behind the needle 2.0 mm when the vibrating presser is operating in front of the needle (PFAFF 3806-12/22) 3.2 mm when the vibrating presser is operating in front of the needle (PFAFF 3806-12/23) When sewing thin materials, on machines with the vibrating presser operating in front of the needle, the top feed stroke can be limited to 2.0 mm by pushing...
  • Page 36: Vibrating Presser Lifting Motion

    Adjustment Vibrating presser lifting motion .05.28 Requirement The top feed dog should touch the bottom feed dog (see arrow), if with stitch length set- ting "2" the lower feed dog has reached the top edge of the needle plate. Fig. 13 - 31 ...
  • Page 37: Position Of Vibrating Presser

    Adjustment Position of vibrating presser .05.29 Requirement When the feed dog is at its highest, the vibrating presser must be set parallel to it. Fig. 13 - 32  Turn eccentric bolt 1 (screw 2) according to the requirement.
  • Page 38: Eliminating Differences In Feed Stroke Lengths

    Adjustment Eliminating diffences in feed stroke lengths .05.30 Requirement When the stitch length and top feed feed levers are set to "3", should work with the same feed when turning the handwheel upper and lower feed. Fig. 13 - 33 ...
  • Page 39: Pressure Of Vibrating Presser And Presser Foot

    Adjustment Pressure of vibrating presser and presser foot .05.31 Requirement The material should be transported perfectly even at the highest sewing speed. No pressure marks may appear on the material. 27 mm Fig. 13 - 35  Top feed pressure - Set regulating screw 1 fl ush with the top edge of the housing. ...
  • Page 40: Adjusting The Top Knife (Chain Cutter)

    Adjustment Adjusting the top knife (chain cutter) Agjusting the diagonal position of the knife quide .06.01 Requirement Adjust the inclined position of knife guide 1 to the throat plate and feed dog.. Fig. 13 - 36 Switch off the machine! Turn off the compresses air! Risk of injury due to accidental machine start-up! ...
  • Page 41: Adjusting The Height Of The Top Knife

    Adjustment Adjusting the height of the top knife .06.02 Requirement When top knife 1 is in its bottom position its right cutting edge must be about 0.5 mm be- low that of the stationary knife 2. Fig. 13 - 37 ...
  • Page 42: Adjusting The Top Knife To The Stationary Knife

    Adjustment Adjusting the top knife to the stationary knife .06.03 Requirement Top knife 1 must bear with slight pressure sideways against the stationary knife. Fig. 13 - 38  Loosen the screws 2 and remove photo-cell bracket 3.  Loosen screws 4 just enough to allow bracket 5 to be moved. ...
  • Page 43: Changing The Top Knife

    Adjustment Changing the top knife .06.04 Fig. 13 - 39 Switch off the machine! Turn off the compresses air! Risk of injury due to accidental machine start-up!  On subclase -12/22 take out screw 1 and removw chain trapper 2 with spring 3. ...
  • Page 44: Adjusting The Light Barrier

    Adjustment Adjusting the light barrier Requirement The light point of light barrier 1 should be on the bevel on the throat plate (see arrow). Make sure that the bevel is polished perfectly. The fi rst needle hole (seam start) should be within the sweing material. Fig.
  • Page 45 Adjustment Parameter setting: Photoelectric barrier Leveling stitches to chain separator seam end. 9999 1000 Speed for light barrier compensation stitches. Photo eye mode 1 = seam start detection 2 = seam detection 3 = seam start & seam end detection. Seam start mode 0 = enable by light barrier 1 = start by pedal in front and light barrier...
  • Page 46: Parametereinstellungen

     Einen leeren Dongle kann man unter der Bestellnummer 72-250 303-91 erhalten.  Um Software auf den Dongle zu laden wird das PC-Tool DongleCopy" benötigt. " Die Beschreibung zum Internet-Update der Steuerung P40 CD sowie PC-Tool DongleCopy" kann unter der Internet-Adresse https://partnerweb.pfaff-in- " dustrial.com/ herruntergeladen werden.
  • Page 47: Stromlaufpläne

    91-191 600-95 Circuit Diagrams Teil 1 Version 07 .12.16 Circuit diagrams 91-191 600-95 PED-A PED-B PED-C PED-D n.c. PED-GEN P-ANA shield A PH B PH IND. M1.1 shield GN/YE Ground Sewing Motor Nähmotor n.c. n.c. n.c. +3,3V n.c. IN-EXT1 IN-EXT2 IN-EXT3 IN-EXT4 N.C.
  • Page 48 Circuit Diagrams 91-191 600-95 Version 07 .12.16 Teil 2 180° SYNC. shield Boot_PN BOOT X_IN RXBF- TXBF+ +15V RST_IN RST_PN RXBF+ TXBF- +15V +3,3V IN_ana1 0V_Logik function control box P40 CD input manuel backtack input mount thread input invers backtack output led + 24V only inputs +24V stab.
  • Page 49 Notes...
  • Page 50 PFAFF Industriesysteme und Maschinen GmbH Hans-Geiger-Str. 12 - IG Nord D-67661 Kaiserslautern Telefon: +49 - 6301 3205 - 0 Telefax: +49 - 6301 3205 - 1386 E-mail: info@pfaff-industrial.com Gedruckt in der BRD / Printed in Germany / Imprimé en la R.F .A. / Impreso en la R.F .A...

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3806-12/23

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