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21

3.7.9.3 Setting the gear clearance

and in the mounting of the top roller

In the cone gear of the drive of the top roller foot, the minimum

clearance must be set. A too small clearance will increase the

friction resistance of the gear, the excessive clearance will

influence the inaccuracy of feeding. The top roller itself is

mounted on balls. With this type of mounting,it is also

necessary to set the minimal possible radial clearance.

The given clearances are set as follows:

Caution! Danger of injury!

Switch off the main switch! Before starting the

setting operation, wait until the motor stops!

Clearance in the wheel mounting

- Loosen three screws (5) /only slightly/.

- Using the screw  (4) set the minimum clearance in the top

roller mounting (2) /it must easily rotate without any rubbing

and with a minimum clearance/.

- Tighten the screws (5), check the set up clearance, even-

tually, repeat the setting procedure.

Clearance in the conic gear

- Loosen the screw (1), in shifting the wheel, resp. the holder

(3) in the holder groove (6), set  the minimum clearance,

the pinion (7) must be pushed up to the holder bottom (6).

- Tighten the screw (1), check the  set up clearance.

3.7.9.4 Setting of the height and of the pressing

force of the top 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

without any clearance.

Set the pressing force of the top roller (1) in such a way, so

that no slipping of the stitched material occurs when being

fed.

Caution! Danger of injury!

Switch off the main switch! Before starting the

setting operation, wait until the motor stops!

Setting of the top roller height

- Lower by hand the presser bar (3) with the top roller (1)

above the throat plate.

- By turning the handwheel, set the feeder into its lower

position (below the throat plate).

- Loosen the screw (4) and set the wheel in such a way, so

that it rests on the throat plate insert.

- Tighten the screw (4).

Setting of the top roller (1) force

- Screwing in the screw (2), the pressing force of the top

roller is increased and inversely.

3.7.9.5 Replacement of the top roller

When replacing the top roller, proceed as follows:

Caution! Danger of injury!

Switch off the main switch! Before starting the

setting operation, wait until the motor stops!

- Unscrew the screw (1).

- Unscrew the screw (3) with the washer (2).

- Remove the driven top roller with the holder (4) from the

holder (5) and from the articulated shaft (6).

- Mount another top roller in inverted procedure to

dismantling.

- Set the top roller according to the par. 3.7.9.2.

6

3

1

4

2

5

4

3

1

2

7

5

6

2

1

4

3

Содержание 1220-6

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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