Dürkopp Adler 755 B Operating Instructions Manual page 219

Programming
Adjusting and testing sewing motor
 The display switches to Test sewing motor.
Fig. 172: Testing the sewing motor
Symbols
Operating Instructions 755 B, 756 B/F - 00.0 - 02/2021
NOTICE
Property damage may occur!
Jamming of the machine.
Unthread the needle thread before starting the sewing motor.
Meaning
Adjust sewing motor  p. 218
Adjust sewing motor speed
• 100 RPM - 3200 RPM (class 755 A)
• 100 RPM - 3000 RPM (class 756 A)
Reference
Switch split needle bar On/Off
Sewing motor On/Off
217