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Thread Presser Base Assembly - Brother BAS-416 Manual

Wiper problems and solutions
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Checking the wiper solenoid
Disconnect the wiper solenoid from the machine by following the cable out of the solenoid and
unplugging at the connector on the machine. With an ohmmeter measure the resistance across
the two pins of the solenoid connector that go to the solenoid. A good solenoid will measure
approximately 23 ohms.
Checking the voltage to the wiper solenoid
Disconnect the wiper solenoid from the machine by following the cable from the solenoid and
unplugging at the connector on the machine. Using a voltmeter set up to read a least +60 VDC.
Connect it to the two pins of the connector from the machine. Press the trim button on the
machine and it will read approximately +60VDC for about a second.
Checking solenoid sensor alignment.
Looking at the solenoid sensor, orientation will vary from machine type; you should see
something that looks like this.
If the sensor plate does not line up correctly then either the sensor or solenoid sensor plate needs
to be adjusted until the alignment is as illustrated above.
Checking upper thread guide hook (wiper) alignment.
Color change machine to the highest needle bar number, 9 or 12, and lower presser foot.
Manually lower the wiper down by pulling down on the screw that the bottom part of the return
spring mounts to. The wiper should look as illustrated below in relation to the hole in the needle
plate. If adjustment is required, loosen the two screws on the wiper and move it until it is correct.
Recheck after adjustment.
Wiper
Needle Plate
Checking thread presser base and cover alignment.
First you want to make to inspect the thread presser cover to make sure it is straight and not
bent. You should see an even spacing all the way across where the magic tape strips are. If not
loosen the adjustment screw on the right and adjusted the thread presser cover until the spacing
is the same all the way across.

Thread Presser Base Assembly

Adjustment Screw
Spacer
Thread Presser Cover
Thread Presser Cover
Magic Tapes
5

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