Bernina B 570 - Stitch-Length Stepping Motor

BERNINA International AG Seestrasse 161 CH-8266 Steckborn Schweiz Seite 142 von 172
DRAFT – VERSION
5g Stitch-length stepping motor
Is used to check stitch-length stepping motor function
Check:
• Select test 5g.
• Press icon to activate the stepping motor. The colour of
the icon will change to light blue, ‘Running’ appears,
and the feed-dog moves back and forth in the stitch
plate.
• Press icon again to stop the stepping motor.
‘Successful’ appears.
• To return to section 5, press .
Repair note:
• If the stepping motor doesn’t move, the fault might be with the motor itself, the wiring or the PCBA-Base.
• Check cables and plugs for deformation and/or wear and tear.
• eplace PCBA-Base (see 4.2.4
).
• Replace stitch-length stepping motor (see 4.3.20)
Important!
Disconnect machine from the power supply.
Do not disconnect or reconnect when the machine is powered.