typical GT1790A - Presser Bar Pressure Adjustment; Bobbin Presser Unit Adjustment

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3. Adjusting the presser bar pressure
! Warning
Please turn off the power switch and confirm that the motor has stopped before operation to
prevent personal injuries caused by unexpected start.
The presser bar pressure shall be set for each pattern respectively.
1) Set the mode to the input mode
Under the input mode where Set Ready LED
goes out, pattern can be changed. In sewing mode,
press Ready key ❷ to change over the
mode to input mode.
2) Call S090 presser pressure
Press Edit key❽ and use Item Selection
key❻ to select S090 presser pressure A.
If S090 value is increased, presser bar pressure will
increase and the cloth is difficult to ruffle during
sewing.
4. Adjusting the bobbin presser unit
! Warning
Please turn off the power switch and confirm that the motor has stopped before operation to
prevent personal injuries caused by unexpected start.
Loosen nut② and adjust the position with stopper
spring③ so that the distance from the front end of
machine bed to bobbin presser ① is 8 to 15mm when
the sewing machine stops. Then tighten nut②.