Mitsubishi Electric LS2-1130 High-Speed Single-Needle Lockstitch Industrial Sewing Machine Instruction Manual

MITSUBISHI ELECTRIC LS2-1130 High-Speed Single-Needle Lockstitch Industrial Sewing Machine

USAGE PRECAUTION

Lubrication (1)
Fill the oil reservoir with oil up to the “H” line. The oil levels should be periodically checked. If oil level is found below “L” line replenish oil to “H” line. For oil, use “MC70M” specified by Mitsubishi.

Lubrication (2)
When a new sewing machine is used for the first time, or sewing machine left out of use for a considerably longtime is used again, remove the rubber plug and replenish a suitable amount of oil as shown in the figure.

Lubrication condition
Check that the oil splashed the oil sight window.

Adjustment of lubrication to the rotating hook
Adjust the lubrication amount of the rotating hook by turning the screw Ⓐ.

Adjustment of the oil pump
For the regular sewing, it is not necessary for the adjustment of the oil pump, but in case of low-speed operation, if the oil splash amount for the oil sight window on the machine arm is reduced, close the oil bypass hole of the oil pump.

Periodical cleaning

1.  Machine
2.  Motor
   Remove dust from the motor filter every one or two months. (Continued operation with the filter clogged with lint or dust may overheat the motor.)
3.  Control Box
   Remove dust from the connector. (If the connector is covered with dust, the machine might malfunction.)

Installation of the belt cover

1.  Install the belt cover on the machine side for safety. Refer to the provided instruction document contained in the same package.
2.  Install the belt cover on the motor side for safety.

Precaution on operation

1.  When the power is turned on or off, keep foot away from the pedal.
2.  It should be noted that the brake may not work when the power is interrupted or power failure occurs during sewing machine operation.
3.  Since dust in the control box might cause malfunction or control troubles, be sure to keep the control box cover close during operation.
4.  Do not apply a multimeter to the control circuit for checking, otherwise voltage of multimeter might damage semiconductor components in the circuit.

HOW TO USE

Installation of the needle

Winding of the bobbin thread

• Tension of wound thread Slack winding is recommended for polyester thread and nylon thread.
• Conically wound thread Move the thread guide toward smaller diameter of wound thread layer.
• Amount of wound thread Loosen the winding amount adjustment screw to decrease thread winding amount and tighten the screw to increase thread winding amount.

Threading of the needle thread
With the thread take-up lever located at the upper most position, pass the needle thread in the order shown in the following figure.

Adjustment of feed (stitch)  length and backstitch

• Adjustment of feed (stitch) length…Adjust feed length by turning the feed length setting dial while depressing the reverse sewing lever.
• Backstitch…Direction of stitching can be reversed by depressing the reverse sewing lever.

Balance of threads tension

Adjustment of the needle  thread tension

• The needle thread tension should be adjusted on the basis of the bobbin thread tension.
• Adjust the needle thread tension by turning the thread tension nut.
  The needle thread tension can be also adjusted by changing intensity and movable range of the thread take-up spring in case of sewing the special fabric and thread.

Adjustment of the bobbin thread tension

• The bobbin thread tension can be adjusted by turning the screw Ⓐ.

Adjustment of the presser foot pressure

• Adjust the presser foot pressure according to the fabric by turning the pressure adjusting screw.
• Sewing pressure should be adjusted to the minimum required strength.

Adjustment of the timing to open tension disc of the needle thread tension regulator
Adjust timing with the following procedure as timing to open the tension disc can be adjusted for the clearance (within the limits of 2 to 7 mm) of the presser foot.

1. Remove the rubber plug and loosen the screw Ⓐ.
2. Move the thread tension releasing cam to the right or the left. Positioned to the right… quick Positioned to the left… slow
3. Tighten the screw Ⓐ after opening condition of the thread tension disc has been checked.
4. It is convenient to operate by fitting the same thickness of plate as the clearance of the presser foot you intend to loosen beneath the presser foot.

SPECIFICATIONS

LS2-1130 Specifications

Note:

• The bobbin should be of high quality free from deformation.
• Some materials and/or sewing conditions may require specifications other than those listed above.
• These specifications are subject to change for machine improvement.