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1. General safety instructions

The  non-observance  of  the  following  safety  instructions  can  cause  bodily  injuries  or  damages  to  the  machine.

1. The machine must only be commissioned in full knowledge of the instruction book and operated by persons with appropriate

training.

2. Before  putting  into  service  also  read  the  safety  rules  and  instructions  of  the  motor  supplier.
3. The  machine  must  be  used  only  for  the  purpose  intended.  Use  of  the  machine  without  the  safety  devices  is  not  permitted.

Observe  all  the  relevant  safety  regulations.

4. When  gauge  parts  are  exchanged  (e.g.  needle,  top  roller,  needle  plate,  feed  dog  and  bobbin)  when  treading,  when  the

workplace  is  left,  and  during  service  work,  the  machine  must  be  disconnected  from  the  mains  by  switching  off  the  master

switch  or  disconnecting  the  mains  plug.

5. Daily  servicing  work  must  be  carried  out  only  by  appropriately  trained  persons.
6. Repairs,  conversion  and  special  maintenance  work  must  only  be  carried  out  by  technicians  or  persons  with  appropriate

training.

7. For service or repair work on pneumatic systems the machine must be disconnected from the compressed air supply system.

Exceptions  to  this  are  only  adjustments  and  function  checks  made  by  appropriately  trained  technicians.

8. Work  on  the  electrical  equipment  must  be  carried  out  only  by  electricians  or  appropriately  trained  persons.
9. Work  on  parts  and  systems  under  electric  current  is  not  permitted,  except  as  specified  in  regulations  DIN  VDE  0105.

10. Conversions  or  changes  to  the  machine  must  be  authorized  by  us  and  made  only  in  adherence  to  all  safety  regulations.
11. For  repairs,  only  replacement  parts  approved  by  us  must  be  used.
12. Commissioning  of  the  sewing  head  is  prohibited  until  such  time  as  the  entire  sewing  unit  is  found  to  comply  with  EC

directives.

It  is  absolutely  necessary  to  respect  the  safety  instructions  marked  by  these  signs.

Danger  of  bodily  injuries  !

Please  note  also  the  general  safety  instructions.

IMPORTANT    WARNING

In  spite  of  all  safety  measures  made  on  the  machines,  inappropriate  actions  of  the  operator  may  lead  to  dangerous  situations.  In

industrial  sewing  machines,  attention  should  be  paid  to  the  following  still  remaining  possible  sources  of  injury:

1. Moving  sewing  needle

- risk  of  injury  when  sewing  with  raised  pressure  foot  or  top  roller,  because  the  finger  guard  is  then  positioned  too  high,

- risk  of  injury  when  inadvertently  threading  down  of  the  motor  threadle.

2. Moving  thread  take-up  lever

- risk  of  injury  when  inadvertently  or  intentionally  inserting  the  finger(s)  between  the  thread  take-up  lever  and  its  guard.

3. Moving  pressure  member

- risk  of  injury  when  holding  sewn  work  in  immediate  vicinity  of  the  pressure  member  and  beginning  to  insert  under  the

pressure  member  a  considerably  thicker  sewn  work  portion,

- risk  of  injury  when  sinking  the  pressure  member.

4. When  switched  off,  the  clutch  motor  slows  down  by  inertia  but  would  be  reactivated  by  an  accidental  treading  down  of  the

motor  treadle.  To  avoid  such  risk,  it  is  advised  to  hold  the  handwheel  by  hand  and  slightly  to  depress  the  motor  treadle.

2. Introduction

This  service  book  contains  instruction  for  regulating  the  mechanisms  of  the  sewing  machine  head.
Instructions  for  use  and  for  putting  the  machine  into  operation  are  not  included  in  this  service  book,  but  they  are  supplied  as

separate  publication.

This sewing machine disposes of a large extent of its use. The machine should be set with respect to the parameters of the sewn

material,  the  sewing  thread  etc.  The  setting  for  the  individual  categories  is  given  in  the  chapter  5.2.

Summary of Contents for 2180-1

Page 1: ...ns for service 2180 1 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 09 2006 Printed in Czech Republic S735 000746 ...

Page 2: ...g the tension and switching off the main and the auxiliary tensionmer 3 4 3 Setting of the adjusting spring 3 5 Feeding mechanism of the needle feed and of the lower feed wheel 9 3 5 1 Description 3 5 2 Stitch length mechanism 3 5 2 1 Setting of the stitch length eccentric 3 5 2 2 Setting of the stitch length button 3 5 3 Lower feed wheel 3 5 3 1 Feeding clutches 3 5 3 2 Wheel feeder and its post ...

Page 3: ... 3 10 2 Replacing the indented belt 3 11 V belt motor head 18 3 11 1 Tensioning 3 11 2 Replacing the V Belt 3 12 Lubrication 19 3 12 1 Description 3 12 2 Refilling oil 3 12 3 Multiple oil use 4 Maintenance table of operations 20 5 Setting the machine according to the sewing category 20 5 1 Introduction 5 2 Table of setting the machine according to the sewing category ...

Page 4: ...he sewing head is prohibited until such time as the entire sewing unit is found to comply with EC directives It is absolutely necessary to respect the safety instructions marked by these signs Danger of bodily injuries Please note also the general safety instructions IMPORTANT WARNING In spite of all safety measures made on the machines inappropriate actions of the operator may lead to dangerous s...

Page 5: ...he sewing head is prohibited until such time as the entire sewing unit is found to comply with EC directives It is absolutely necessary to respect the safety instructions marked by these signs Danger of bodily injuries Please note also the general safety instructions IMPORTANT WARNING In spite of all safety measures made on the machines inappropriate actions of the operator may lead to dangerous s...

Page 6: ...ps Loosen both screws 1 Shift axially the shaft 2 with the hook 3 so as to obtain the required distance A For setting up use the setting gauge 4 as per the repective figure Carefully retighten the screws 1 after the adjustment Caution One of these screws must bear on the flat of the shaft 2 3 1 3 Setting the distance of the hook from the needle The hook point 1 is set up to the maximum distance of...

Page 7: ...y by levering in applying the pressure on the protective sheet in the sense of the arrow 4 we shall increase the play Check up the protecting effect in pushing against the needle in the sense of the arrow 5 The hook point must not catch the needle If so set up the protecting effect correct eventually the setting of the distanceofthehookpointfromtheneedleaccordingtotheparagraph 3 1 3 3 1 6 Setting ...

Page 8: ... turned a bit the hook remove the bobbin case 3 Unscrew thorougly the screw 4 Remove the body of the hook 5 upwards When mounting the procedure is inverse 3 1 9 Setting the gear The mutual angular orientation of the gear wheel 1 relative to the gear wheel 2 shouldensuretheaccessibilityofthescrew 5 atthemoment when the hook point comes to lie opposite the needle 4 The wheel 2 is to be set with its ...

Page 9: ...el angular adjustment The handwheel 5 must be situated in its precise position relative to the needle and thread mechanism This position is given by a pin 2 which locks the connecting rod of the needle rod 1 through a hole in the arm 3 In this position the indicator 6 of the handwheel must show O The position is fixed by the handwheel screw 4 contacting a small flat surface provided on the upper s...

Page 10: ...The guide pin 4 is to be set in such a way that the needle bar holder moveseasily Tighten the screws 1 and 3 3 2 5 Setting the needle the needle bar holder in the direction of sewing The distances A between the needle and the edges of the needle hole when shifting the needle in and out from the throat plate must be the same Caution Danger of injury Switch off the main switch Before starting the se...

Page 11: ...ting the setting operation wait until the motor stops Turn slightly the finger 6 in the sense towards the throat plate 1 Place the throat plate 1 and screw in the screws 3 3 3 3 Side setting of the throat plate post The throat plate post 1 is to be set by its side laterally in such a way so that the axisof the piercingofthethroatplate 2 isintheneedleaxis 3 Caution Danger of injury Switch off the m...

Page 12: ... thread tension with the category 200 a stronger spring of the tensioner 5 is used For relieving the disks of the main tensioner there is a gap of 0 5 1 mm between the disks This will be atained by suitable shaping of the relieving disk 6 of the tensioner the respective setting has been done in the manufacturing factory The tension of the secondary tensioner is controlled by the nut 2 The tension ...

Page 13: ... Loosen the screws 5 of the lever 6 Insert the setting bar 3 into the hole in the eccentric 1 and prop it from above against the feeding shaft 4 Shift axially the eccentric 1 on the shaft into its extreme positions and place it in the middle Tighten the screws of the eccentric 1 to the maximum one screw first and after having turned slightly the hand wheel the second screw as well Tighten the scre...

Page 14: ...ntil the required height of the teeth X of the wheel feeder is attained Tighten then still the screw 5 by 45 1 8 revolution Tension the tensioner 6 up to the stop Be careful in side shifting it to the centre of the chain Tighten the screw 3 Loosen the screw 5 by 45 1 8 revolution into its original position In thisway theoptimalclearanceof thechaintransmission is attained Tighten the screw 4 Correc...

Page 15: ...roller 3 6 1 Description The starting movement for the drive of the top roller feeder is the bottom feeding shaft From this shaft the movement is transmitted by the indented belt 1 onto the top feeding shaft 2 A component part of the transmission by indented belt is the pulley 3 the tensioning roller 4 the roller 5 and the pulley 6 Starting from the shaft 2 the movement is further transmitted thro...

Page 16: ...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 pulley 2 in such a way that the distance of 5 mm is attained in accordance with the illustration Tighten the screws 1 3 6 4 Setting the tensioning roller The tensioning roller of the indented belt of the top feeding is moun...

Page 17: ...he pulley 4 Remove the pulley 4 Remove the front guard Loosen and unscrew the screw 14 of the holder of the wheel 15 and remove it from the holder 21 Loosen the screws 16 and 17 of the holder 18 Removetheholder 18 togetherwith the holder 15 and articulated shaft 13 from the machine Loosen the screws 19 of the pulley 20 Loosen the screw of the ring through the hole 24 Hold the pulley 20 and pull ou...

Page 18: ... in the groove of the holder 4 set the required value X and tighten the screw 1 Loosen the screw 5 By shifting the holder 2 in the holder 6 set the bottom edge of the roller to the edge of the needle operture Tighten the screw 5 3 6 6 3 Setting the gear clearance and in the mounting of the top roller Intheconegearofthedriveofthetoprollerfoot theminimumclearance must be set A too small clearance wi...

Page 19: ...or with treadle is to be A 12 5 mm Caution Danger of injury Switch off the main switch Before starting the setting operation wait until the motor stops Place a cube 1 having the height of A 12 5 0 7 mm under the presser foot Screw in thoroughly downwards the screw 2 Tighten slightly the screw 3 in such a way that the lever 4 turns on the shaft 5 with a certain friction moment Push with the screwdr...

Page 20: ...obbin the pressing function of the cam on the winders shaft is interrupted and it moves in the sense of the arrow A fine setting is to be done on an incorporated condition in the machine Using the screw 2 the position of the friction part of the pickup lever 1 is adapted In opening the lever the stopping function is accelerated Its inverse function delays it A test is to be done after having inser...

Page 21: ...nut 5 totheright themoment will increase and on the contrary The value of the tensioning moment is very sensible to the turning of the nut 5 When setting it it is necessary to proceed very carefully set it up only in emergency cases Check the moment using a torque limiting wrench Caution The clutch guarantees only one mutual position of the hub of the lower shaft 2 and that of the belt wheel 1 No ...

Page 22: ... indented pulley 4 Tensionthebeltandmountthedismantledcomponentsintheinverse order 3 11 V belt motor head 3 11 1 Tensioning Caution Danger of injury Switch off the main switch Before starting the 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 tensioned ...

Page 23: ... same quality When putting the machine into operation each mechanism of the machine is to be lubricated with several drops of oil Oil is only refilled thereafter into the oil reservoirs using an oil can The oil tank 1 of the central distribution is to be filled up to the mark max The oil reservoir 2 for lubricating the hook is to be filled after having removed the sealing plug up to its top edge 3...

Page 24: ...ents such as the needle the throat plate For this reason the setting of the machine is divided into 2 categories 1 light sewing 2 medium heavy duty sewing In the factory where this machine has been manufactured the machine has been set with respect to the standard parameters of the required sewing category which is designed by the number included in the commercial designation of the machine If the...

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