Maintenance Procedure of Industrial Bartack Machine

Introduction:
Industrial bartack sewing machine is actually a lockstitch stitch machine group. It contains I needle and I bobbin (looper). By this machine a very high density lockstitch is produced in a very short length for increase strength of that particular place. These machines are used for sewing both woven and knitted garments. For light thickness fabrics, needle size should be lower and for heavy thickness fabric, height needle size can be used. Mainly this machine is used for the various joint points and the belt lopper of the trouser.

Objects:
  1. To know about bartacking machine.
  2. To know different parts of bartack machine.
  3. To know about thread path of the machine.
  4. To know about the specification of bartack machine.
  5. To know about adjustment points of the machine.
  6. To know about working principle of bartack machine.
  7. To know about thread required per stitch.
  8. To know about the stitch length can be produced.
Specification of bartack machine:
  • Model no: MAL-254 TD
  • Group: Lock Stitch (Interlcement)
  • Brand: Juki
  • Made in: Japan
  • Stitch per one Press: 64 stitches (per pressure)
  • No of needle: 1 Needle
  • No of bobbing: 1
  • Seam class: Super imposed
  • Stitch class: 300
Industrial bartack sewing machine
Fig: Industrial bartack sewing machine
Function of bartack machine:
For sewing light or heavy fabrics. Specially in the trouser’s joining points and belt loops of trouser.

Maintenance of bartack machine:
Maintenance can be of different types. But following types are important in this aspect:

a. Routine maintenance:
Lubrication and regular inspection are the constituents of routine maintenance. Lubrication ensures long life and safe working of all the equipments. Inspection tries to detect faults in equipments so that repairs and replacements may be undertaken at the right time.

b. Schedule maintenance:
This type of maintenance provides for inspection, overhaul lubrication and servicing of the machine at predetermined dates. Overhauling of machine, cleaning of all components is normally done in this manner. It involves opening of the machine into its smallest components and carry out lubrication.

Setting:
The setting of the lockstitch machine is of immense importance. Following setting points needs to be ensured before running the machine.

a. Stitch density controller:
It controls the no of stitches per inch. Before starting the machine, stitches per inch is determined by rotating the knob and fixing it at the desired position.

b. Motor:
Motor rpm depicts the speed of the machine. The rpm is controlled by tightening or loosing the belt over machine and motor pulley.

c. Needle:
Needle undergoes accurate setting to ensure proper sewing. Needle is attached by means of a screw which needs to be tightened enough to produce easy sewing. Again the needle size is also important from fabric point of view.

d. Pressure foot:
The type of pressure foot to be used and its proper setting is important, which is ensured by proper attachment with the motor through machine pulley.

e. Feed dog:
It is often found that due to random working the feed dog is subjected to be loose which may cause accident also. Thus the feed dog must be set properly with the screw.

Replacement:
The replacement is revealed when the retention of equipment is no more remains an economical proposition. A replacement is affected when the equipment is subjected to compete breakage which cannot be used even after repair or the components has become so obsolete that affects production or it has crossed its expiry date. Replacement can be needle, pressure foot, feed dog etc undergo frequent replacement.

Precautions:
Following precautions must be taken when repair, setting maintenance or replacement is carried out in the bartack machine.
  1. All repair and maintenance work must be carried out by switching off the machine.
  2. Right tools should be used at right place.
  3. Skilled personnel should be involved for specialized job.
  4. Careful handling of all the components is necessary.
  5. The components should not be too tight or too loose.
Conclusion:
Bartack sewing machine is one of the most important and most expensive machine of apparel production. By this experiment we came to know about the maintenance procedure of this bartack machine and it’s different function in garments pressing which would help us in our near professional life.
 
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