Instructions for service
1220 - 6
Minerva Boskovice, a.s., Sokolská 60, CZ - 680 17
Boskovice
Tel.: +420-516-453434, 453433, 494111
Fax: +420-516-452165 http://www.minerva-boskovice.com
Edition: 10/2002 Printed in Czech Republic
S735 000549
Page 1: ...s for service 1220 6 Minerva Boskovice a s Sokolsk 60 CZ 680 17 Boskovice Tel 420 516 453434 453433 494111 Fax 420 516 452165 http www minerva boskovice com Edition 10 2002 Printed in Czech Republic S...
Page 2: ...es stitch widths with needles side by side 3 5 Threadtensionersandlimiter 10 3 5 1 Description 3 5 2 Setting the tension of main and auxiliary tensioners 3 5 3 Setting the tensioning mechanism of the...
Page 3: ...tion 25 3 14 1 Description 3 14 2 Refilling oil 3 14 3 Multiple oil use 4 Threadtrimming 26 4 1 Description of the trimming mechanism 4 2 Setting the pickup roller 4 3 Setting the cam 4 4 Setting the...
Page 4: ...actions of the operator may lead to dangerous situations In industrial sewing machines Minerva attention should be paid to the following still remaining possible sources of injury 1 Moving sewing need...
Page 5: ...e slide plate 1 Loosen both screws 2 By turning the screws 3 and 4 set the required distance A After having set it tighten carefully the screws By axial shifting of the gear wheel 5 set the axial clea...
Page 6: ...ut the screwdriver into the hole of the screw 3 and using the regulating screw set up the required clearance between the needle 2 and the protecting sheet 1 When turning to the right the protecting sh...
Page 7: ...e accessibility of the screw 5 at the moment when the hook point comes to lie opposite the needle 4 The wheel 2 is to be set with its gear rim symmetrically to the centre of the gear wheel 1 The clear...
Page 8: ...on the crank 3 in a ball bearing on the needle bar carreer it is mounted in a sliding way The greasing system of the mechanism is central with a wick 3 2 2 To check the handwheel angular adjustment T...
Page 9: ...plate 7 and the needle bed 6 are to be set up one to the other in such a way so that with the given stitch width A both needles pass through the centres of the needle penetration holes Caution Danger...
Page 10: ...removing the throat plate and its insert When mounting the throat plate 1 the fingers 4 of the bobbin case must fit into the recess 5 of the throat plate When dismantling the throat plate insert 2 it...
Page 11: ...eight of the guide 1 Tighten then the screw Loosen the screw 5 and set the guide 1 in the direction of sewing in front of the left needle at the moment when the needle starts piercing the material and...
Page 12: ...ng direction tighten the screw Check the influence of the setting on the stitch locking 3 4 5 Setting the guide of the needles stitch widths with needles side by side The side setting of the guide is...
Page 13: ...by the dynamometer 2 as it is shown on the illustration The size of this force differs according to the category of sewing and is indicated in the par 11 2 The tension of the auxiliary tensioner is r...
Page 14: ...3 mm set the angle A 45 and tighten the screw 11 Turn the washer with the nose 7 in such a way that the distance B 3 mm is attained Put the screwdriver into the slit in the bushing 8 and turn it in c...
Page 15: ...e eccentric 1 and leans from above against the feeding shaft 4 Caution Danger of injury Switch off the main switch Before starting the setting operation wait until the motor stops Set the angle 270 on...
Page 16: ...Caution Danger of injury Switch off the main switch Before starting the setting operation wait until the motor stops Loosen the screw 7 of the gripping joint of the lever 8 Set the lateral play of th...
Page 17: ...tion Danger of injury Switch off the main switch Before starting the setting operation wait until the motor stops Set the zero stitch screw in the knob 9 to the bottom of the cam 1 Set the angle 0 on...
Page 18: ...knob in the clockwise direction and inversely Tighten firmly the screws 5 Insert a screwdriver into the hole 8 of the scale 2 and adjust the scale in such a way that the maximum length on the scale i...
Page 19: ...ly connected with the shaft 6 The draw bar 3 imparts the clutch its oscillating motion The clutch is being engaged by means of the wedge 7 on the connecting rod 8 through the eccentric 9 which is situ...
Page 20: ...move which means when it is in a dead centre of its oscillating motion This corresponds to the angler 90 on the handwheel Caution Danger of injury Switch off the main switch Before starting the settin...
Page 21: ...etting thereof is to be done as follows Caution Danger of injury Switch off the main switch Before starting the setting operation wait until the motor stops Loosen the screws 1 of the pulley 2 Set the...
Page 22: ...ble to remove the indented belt 23 from the arm of the machine Replace the belt with a new one and proceed to the assembly inverted procedure of dismantling Proceed to the setting operation according...
Page 23: ...with the diameter of 25 mm and with the diameter of 35 mm The suitability of the diameter used depends on the type of sewing and on the concrete technological operation There are in general valid the...
Page 24: ...p roller Check the setting in the bottom dead centre of the bottom feeder the feeder is below the throat plate The top roller in thos position of the feeder must fit onto the throat plate insert witho...
Page 25: ...filled the bobbin An ideal winding is attained with a sufficient pretension of the thread obtained on the thread guide 4 and with 1 mm under the diameter of the bobbin The shaft is mounted in a swingi...
Page 26: ...under the face of the hub 2 When the clutch disengages during a normal run the screws are to be turned by one thread to the right and a test is to be done during the running In an opposite case when...
Page 27: ...setting operation wait until the motor stops The belt is correctly tensioned when the opposite sides of the belt approach one to another by up to 20 mm in applying the force of 10 N The belt is tensi...
Page 28: ...ck 9 lubricates the shifting wedge of the feed clutch 3 14 2 Refilling oil For lubricating the machine oil Esso SP NK 10 is used or other oil with the same quality When putting the machine into operat...
Page 29: ...against the bracket 5 and at the same time the shaft 2 up to the stop against the shaft 3 With the holder 1 held on the stop shift the shaft 2 in such a way that there appears the gap A 0 2 to 0 4 mm...
Page 30: ...ry Switch off the main switch Before starting the setting operation wait until the motor stops Loosen the screws 4 and 5 Turn the moving trimming knife 1 in the sense of the arrow and set it in height...
Page 31: ...tive sewing category 4 8 Setting the switching of electromagnets The electromagnets of the trimming device and loosening of the tensioner must work in accordance with the diagram This is ensured by se...
Page 32: ...way that it enables the maximum stitch length when sewing in forward and in rearward sense If this position is not correct the length of the stitch will be shortened in one or the other feed direction...
Page 33: ...el position sensor The detailed information concerning the drive the control panel and the setting of the position sensor is given in the manual of the drive and of the control panel 9 Lighting 9 1 Mo...
Page 34: ...the standard parameters of the required sewing category which is designed by the number included in the commercial designation of the machine If the user desires changing the given setting to another...
Page 35: ...of the needle number it is necessary to correct the setting of the distance of the shuttle from the needle according to the paragraph 3 1 3 and at the same time the setting of the fixed trimming knif...
