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Programming
Test Step.Motor (Test of the stepper motor) subitem
You may use this subitem to test the stepper motors for stitch length
adjustment, sewing foot lifting/sewing foot pressure and stroke
adjustment. The machine can move to defined positions (steps),
where 2,000 steps = 360.
To test the stepper motors:
1. Select the desired motor with the
Fig. 64: Test Step.Motor (Test of the stepper motor) subitem
2. Press the OK button to confirm the selection.
3. Use the
If the motor is functioning correctly, the behavior described in the table
Information
There is no specific procedure for testing the stepper motor encoders.
The encoders are tested along with the stepper motors. If the result for the
stepper motors is OK, the encoders will be functional as well.
Service Instructions 878-M PREMIUM - 03.0 - 10/2019
Input
Stepper motor
1
Stitch length adjustment – upper motor
2
Stitch length adjustment – lower motor
3
Sewing foot lift
/
buttons to test the selected motor.
will be shown.
Input
Stepper motor
1
Stitch length adjustment –
upper motor
2
Stitch length adjustment –
lower motor
3
Sewing foot lift
/
in the
Stepper :
1
Position:
OFF(0)
Test method
The feed gear completes a movement.
The feed gear completes a movement.
The sewing feet perform a vertical movement.
field.
Stepper
93
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