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Checking the thread guide solenoid base, thread presser base, and wiper holder plate. 
 

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Thread Guide Solenoid Base

 

 

Move the solenoid arm in the direction of the arrow with your finger. The upper thread 
guard hook (wiper) should move easily. If not loosen the three mounting screws and 
rotate the thread presser base until it does. Will need to go back and adjust the wiper 
holder plate after finishing. 

 

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Thread Presser Base

 

 

If the first or last needle, 9 or 12, cause the upper thread guard hook (wiper) to stick at 
one end then loosen the two screws at that end and adjust the thread presser base until 
the wiper moves freely in and out. After adjusting make sure that the presser foot does 
not touch the thread presser base after adjustment. 
 

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Wiper Holder Plate

 

 

First in inspect the wiper holder plate to make sure that it is not bent. Then check that it 
very lightly touches the thread hook plate with the wiper in the up position. If not, loosen 
the screw that attaches it to the machine and adjust as necessary. 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Solenoid Arm 

Wiper Holder Plate 

Thread Guide Solenoid 
Base mounting screws 

Thread Presser Base 
mounting screws 

Thread Presser Base 

Presser Foot 

Upper thread guard Hook (Wiper) 

Thread Hook Plate 

Содержание BAS-416

Страница 1: ...tter troubleshoot it So this is what happens with the wiper assembly during a trim After the knives have cut the upper and lower threads the wiper solenoid energizes briefly and pushes down on the connecting rod in the direction of the arrow The wiper assembly moves down the guide causing the wiper to extend downward through the upper thread holder As the wiper gets down to the bottom of its trave...

Страница 2: ...olenoid is defective See checking the wiper solenoid Circuit board is bad See checking the voltage to the wiper solenoid Wiper only moves a little Wiper solenoid arm screws are loose or missing See Wiper Assembly Parts Breakdown Nut on positioning spacer B is either loose or missing See Wiper Assembly Parts Breakdown Thread presser base misadjusted or bent See checking thread presser base and cove...

Страница 3: ...ive to thread to prevent nut from coming off See Wiper Assembly Parts Breakdown Thread guide solenoid bracket base is misaligned or scratched at the bottom of the slot See checking thread guide solenoid base Lower arm cushion is cracked missing or the screw has broken off causing the positioning spacer B to damaged the bottom of the thread guide solenoid bracket base See Wiper Assembly Parts Break...

Страница 4: ...4 Wiper Assembly Parts Breakdown ...

Страница 5: ...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 shoul...

Страница 6: ...stick at one end then loosen the two screws at that end and adjust the thread presser base until the wiper moves freely in and out After adjusting make sure that the presser foot does not touch the thread presser base after adjustment Wiper Holder Plate First in inspect the wiper holder plate to make sure that it is not bent Then check that it very lightly touches the thread hook plate with the wi...

Страница 7: ... or missing lower arm cushion usually causes this If the positioning spacer B is damaged or deformed it will need to be replaced If the thread guide solenoid base is damaged or deformed sometimes it can be filed at the bottom to remove the bump in the metal or it can be replaced as well Front View Positioning Spacer B Washer Nut Thread Guide Solenoid Base Damaged or deformed areas Pin ...

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