Related Manuals for Pfaff 900/51
Summary of Contents for Pfaff 900/51
- Page 1 -900/51 -900/57 Service Manual for the series 480, 560 and 950 296-12-17 607 Justieranleitung dtsch. 06.95...
- Page 2 At the time of printing, all information and illustrations contained in this document were up to date. Subject to alteration The reprinting, copying or translation of PFAFF Service Manuals, whether in whole or in part, is only permitted with our previous agreement and with written reference to the source.
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Page 3: Table Of Contents
Table of Contents Contents ................Chapter - Page Safety ..................... 1 - 1 General notes on safety .................... Safety symbols ......................1 - 2 Danger ........................1 - 2 Adjustment ..................... 2 - 1 Notes on the service manual ..................2 - 1 Tools, gauges and other accessories ................ -
Page 4: Safety
Safety Safety General notes on safety This machine must only be operated by adequately trained operators and only after having completely read and understood the Instruction Manual! All Notes on Safety and Instruction Manuals of the motor manufacturer are to be read before operating the machine! The Danger and Safety Instructions on the machine itself are to be followed! The machine must be used only for the purpose for which it is intended and must not... -
Page 5: Danger
Safety Safety symbols Danger! Points to be observed. Danger of injury to operating and specialist personnel! Danger Do not reach into the sewing area while sewing! Danger of injury caused by needle! Do not leave any objects on the table or near the needle plate while carrying out adjusting work. -
Page 6: Adjustment
Adjustment Adjustment Please observe the safety instructions of this service manual as and the notes on safety in the instruction manual before carrying out any maintenance or adjustment work. On the 480 series no c-clamps may be attached to the needle bar as this would damage the special coating on the needle bar. -
Page 7: Pre-Adjusting The Control Cam
Adjustment Pre-adjusting the control cam Requirements At the t.d.c of the needle bar, 1. the beginning of the highest point of the trip of the control cam 6 sould be positioned under the tip of pawl 8 and 2. the right-hand side of the trip should be flush with the right-hand side of pawl 8. 2-02 Fig. -
Page 8: Roller Lever
Adjustment Roller lever Requirements When the needle bar is positioned 1.8 mm after the b.d.c, 1. the roller of the roller lever 4 should engage easily with the control cam 7 and 2. the roller of roller lever 4 should be centred in the cam notch of the control cam 7 2-03 Fig. -
Page 9: Pawl
Adjustment Pawl Requirement With the thread trimmer in resting position, the distance between pawl 2 and the highest point of the control cam should be 0.3 mm. 0.3 mm 2-04 Fig. 2 - 03 Position the bearing surface of control cam 1 with its highest point below pawl 2 by turning the hand wheel. -
Page 10: Engaging Solenoid
Adjustment Engaging solenoid Requirement When the needle bar is positioned 1.8 mm after the b.d.c and the engaging solenoid is actuated, the distance between the engaging lever 1 and the pawl 2 should be between 0.2 and 0.3 mm. 2-05 Fig. -
Page 11: Release Lever
Adjustment Release lever Requirement When the needle bar is positioned 1.8 mm after the b.d.c and the engaging lever 1 is actuated, the distance between the roller of the roller lever 2 and the bottom of the control cam 3 must be approx. 0.2 mm. 0.2 mm 2-06 Fig. -
Page 12: Engaging Lever
Adjustment Engaging lever Requirement When the needle bar is at the t.d.c and the thread trimmer is in resting position, the distance between the roller of the roller lever 3 and the outer diameter of the control cam 4 should be between 0.3 and 0.5 mm. 0.3 - 0.5 mm 2-07 Fig. -
Page 13: Lateral Adjustment Of The Thread Catcher
Adjustment Lateral adjusting of the thread catcher Requirement 1. The tip of the thread catcher 6 should point exactly to the middle of the needle. 2. The thread catcher 6 should not touch anywhere when in motion. 2-08 Fig. 2 - 07 Unscrew needle plate and feed dog. -
Page 14: Front Reversal Point Of The Thread Catcher
Adjustment Front reversal point of the thread catcher Requirement In the front reversal point of the thread catcher 3 the rear edge of thread catcher cutout should be 1 mm in front of the bobbin case position finger 4. 2-09 Fig. -
Page 15: Re-Adjusting The Control Cam
Adjustment Re-adjusting the control cam Requirement When the end of the hook plate 1 is positioned 2 mm behind the middle of the lug of the bobbin case position finger, the distance between the tip of the thread catcher 6 and the middle of the lug should also be 2 mm. -
Page 16: Retaining Spring
Adjustment Retaining spring Requirement When the thread trimmer is in resting position, the distance between the retaining spring 1 and the roller lever 3 should be 0.5 mm. 0.5 mm Fig. 2 - 10 Position retaining spring 1 together with the cover disk. 2-10 Tighten screws 2 sligthly. -
Page 17: Knife To Needle Clearance
Adjustment Knife to needle clearance Requirement The distance between the front edge of the knife 1 and the needle should be 4 mm. 4 mm 2-12 Fig. 2 - 11 On needle-feed machines set the stitch length to "O". Position the needle bar at b.d.c Push knife 1 under the safety plate and align in accordance with the requirement. - Page 18 Adjustment Manual trimming control Requirement Both threads have to be cut perfectly in the catcher cutout on both right and left-hand side. 2-13 Fig. 2 - 12 Position the needle bar at b.d.c and activate the engaging lever manually. Turn the hand wheel until thread catcher 1 is its front reversal point. Double a thread and insert it into the cutout of thread catcher 1.
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Page 19: Tension Release Of Needle Thread
Adjustment Tension release of needle thread Requirements 1. When the thread trimming unit is in resting position, trip 5 should be engaged and at a distance of 0.5 mm from the release cone 1. 2. When trip 5 is positioned at the highest point of the release cone 1, the tension disks should be spaced at a mimimum of 0.5 mm from each other. -
Page 20: Positioner
Adjustment Positioner Requirements 1. When sewing is interrupted, the machine should position itself 4 to 5 mm after the b.d.c of the needle bar. 2. After trimming, the machine should position itself at the t.d.c of the take-up lever. Adjustments to be carried out in accordance with the instruction manual of the motor. 2 - 15... -
Page 21: Mounting And Dismounting The Control Unit
Adjustment Mounting and dismounting the control unit Fig. 2 - 14 In order to dismount the control unit, pull plug 1 out of the socket of the motor control plate or the control box as applicable. Loosen screw 2 and remove linkage 3 from its slot. Remove connecting rod 4. - Page 23 Notes...
- Page 24 Aktiengesellschaft Postfach 3020 D-67653 Kaiserslautern Königstr. 154 D-67655 Kaiserslautern Telefon: (0631) 200-0 Telefax: (0631) 172 02 Telex: 45753 PFAFF D Gedruckt in der BRD Printed in Germany Imprimé en R.F.A. Impreso en la R.F.A. Stampato in R.F.G. e a a...