Brother BAS-342F, BAS-341F, 342Fi, PROGRAMMABLE ELECTRONIC PATTERN SEWER Troubleshooting

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15. TROUBLESHOOTING

15. TROUBLESHOOTING

Problem

Cause		Check

Remedy	Page

Presser does not rise.

Presser does not drop.

Presser lift amount is incorrect.

Solenoid-type work clamp lifts up without clamping the material.

Thread wiper does not operate correctly.

Lower thread winds to one side.

Lower thread winding amount is incorrect.

Thread slips out of the needle.

Work clamp operation is sluggish.

Presser lifter air tube is bent or damaged.

Work clamp operation is sluggish.

Presser lifter air tube is bent or damaged.

Incorrect position of presser arm lever F.

Work clamp pressure is too light.

The thread wiper is obstructing the needle.

Thread wiper position is incorrect.

Bobbin winder thread tension stud heights is incorrect.

Bobbin presser position is incorrect.

Stitches being skipped at the sewing start.

Uneven upper thread length.

Position of shuttle race thread guide is incorrect

Sliding part of the work clamp lubrication

Presser lifter air tube

Sliding part of the work clamp lubrication

Presser lifter air tube

Distance between work clamp and top of needle plate

Check the setting of the memory switch (memo-35).

Clearance between thread wiper and needle tip

Thread wiper position

Bobbin winder thread tension stud height

Thread winding amount

Refer to “Skipped stitches occur”.

Upper thread length

Position of shuttle race thread guide

Grease the sliding part of the work clamp.

Straighten the bend in the tube or replace the tube.

Grease the sliding part of the work clamp.

Straighten the bend in the tube or replace the tube.

	Adjust the work clamp lift	37
	amount.	37
	amount.

	Increase	the setting	value	49
	of the	memory	switch	49
	(memo-35).

	Adjust the height of the			38
	thread wiper.			38
	thread wiper.


	Adjust the operating distance			38
	of the thread wiper.			38
	of the thread wiper.


	Adjust the height of the			11
	thread tension stud.			11
	thread tension stud.


	Adjust the position of the			11
	bobbin presser.			11
	bobbin presser.


	Refer to “Skipped
	stitches occur”.


	Adjust the sub-tension.			13


	Adjust the position		of the	33
	shuttle race thread guide			33
	shuttle race thread guide

BAS-341F, 342F

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Contents BAS-341F BAS-342F Safety indications and their meanings Safety InstructionsEnvironmental requirements InstallationMaintenance and inspection CleaningSewing 1971S Contents Changing Special Functions BAS-341F Name of Each PartsBAS-342F Needle SpecificationsPreparation Before setting upTilting the sewing machine head PositioningInstalling the foot switch Connecting the ground wireBelt tension Installing the programmer option Installing the spool standAdjusting the air pressure Lubrication points LubricationCorrect USE Installing the needle and running the sewing machineSelecting the needle and thread To turn the pulley by handThreading the upper thread Winding the lower thread Sewing conditions and thread tension Replacing the bobbin case and threading the threadLower thread tension Upper thread tension Pretension tension Explanation of panel Using the Operation PanelIndicator Switch Compatible types of floppy disk Using the floppy diskHow to use the cleaning disk Setting the floppy diskIf an error message is displayed Using the program R/W Read/Write switchClearing the error To Read a pattern to memoryResuming operation from a stopping poing Using the Test switch Checking the sewing patternContinuing sewing from a stopping point Using the emergency stop switchChanging the X-SCALE and Y-SCALE settings Adjusting the sewing Speed controlUsing the bobbin thread counter Using production counter Using single split mode Shifting a stitch pattern Before starting sewing SewingSewing operation 1942S Cleaning the shuttle hook Maintenance and InspectionLubrication Draining the oil Cleaning the control box air inlet portChecking the needle Cleaning the eye guardAdjusting the needle bar lift amount Adjusting the needle bar heightAdjusting the driver needle guard Adjusting the needle clearanceAdjusting the shuttle race thread guide Replacing the movable and fixed knives Adjusting the movable knifeMovable knife Presser foot adjustment Adjusting presser foot lift to 5 8 mm Adjusting presser foot lift to 3 5mmChanging the presser foot lift Standard presser foot lift is 3 mm max mmAdjusting the needle up stop position Adjusting the wiperChecking the input sensor and DIP switch input Checking the input voltage Clearing all memory settingsPanel DIP switch functions DIP SwitchFeeding speed is switched to high speed DIP switches inside the control box DIP Switch Changing Special Functions and Using the Memory Switches Memory switches 00 0F Switch No When on Memo-10 Extended option output Memory switches 20 2FSwitch No Possible Units Error Codes Error codes E.9 * E.F Gauge Parts List According to Subclasses Plate blank Troubleshooting Incorrect needle and shuttle hook timing Turn the sub-tension nut To adjust the tension Adjust the sub tension Sharpen or Replace Fixed knife Needle thread presser device OptionAir wiper device 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone