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Programming
Test Step Motor subitem
You use this subitem to test stepper motors for stitch length adjustment, sew-
ing foot lifting/sewing foot pressure and stroke adjustment. The machine can
move to defined positions (steps), where 2000 steps = 360.
To test the stepper motors:
1. Select the desired motor with the
Fig. 95: Test Step 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
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 869-M PREMIUM - 00.0 - 07/2018
Input
Stepper motor
1
Stitch length adjustment
2
Sewing foot lift
3
Stroke adjustment
buttons to test the selected motor.
/
table will be shown.
Input
Stepper motor
1
Stitch length adjustment (x30) The feed gear completes a movement.
2
Sewing foot lift (x40)
3
Stroke adjustment (x50)
buttons in the
/
Schrittm:
1
Position:
OFF(0)
Test method
The sewing feet perform a vertical movement.
The lifting gear completes a movement.
field.
Stepper
127
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