Lubrication Condition And Adjustment On Lubrication To The Thread Take Up Lever; Adjustment Of Lubrication To The Rotating Hook; Precaution For The Built-In Type Detector; Installation Of The Belt Cover - Mitsubishi Electric LT2-2250-B1T Instruction Manual

USAGE PRECAUTION
3 Lubrication condition and
adjustment on lubrication to
the thread take up lever
( 1 ) See dripping of oil through the oil sight window
to check oiling condition during operation.
( 2 ) Adjust lubrication quantity to the thread
take up lever mechanism by turning the
lubrication adjustment screw.
Increase Decrease

5 Precaution for the built-in type detector

1 . Since the optical type detecting element is used in the detector, prevent dust or oil from sticking to
the detecting plate when the sewing machine pulley is removed for adjustment.
If they have stuck, wipe them off with soft cloth carefully so that the surface is not scratched, do
not let oil permeate the clearance on the detecting plate.
2 . In case of disconnection of the position detector connector, running off the belt or complete
constraint and over load, the motor is automatically turned off after predetermined time to prevent
burning of the motor. (However, in case of half-constraint and over load, the power may not be
turned off.) After the failure is eliminated, the normal operation is resumed by turning off the power
once then turning on again.
The same operation occurs for the detector malfunction or the line breakage.

6 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.

7 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.
4 Adjustment of lubrication to the
rotating hook
Oil sight
window
Lubrication
adjustment screw
— 3 —
Adjusting
Decrease Increase
screw
Nut