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

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5. CORRECT USE

5-6-6. Pretension tension

1940S

1.Raise the work clamp (1) and open the main tension disc (2).

The thread take-up spring (3) should not operate when the thread is pulled in the direction of the arrow.

2.Set the thread tension for the thread breakage detector pretension (4) to approx. 5 g. Weaken the thread tension for the machine head pretension (5) as much as possible.

Standard for balance of thread tension

Adjust the thread tensions so that the total tension for the pretensions (4) and (5) is lower than the tension for the thread take -up spring.

When the thread breakage detector is activated, set to ON DIP switch A – 8. (Detection precision : DIP switch B – 5, Refer to “ DIP SWTCH “.)

Note

If misoperation of the thread breakage detector continues, repeat the adjustment procedure above. (Such misoperation is most likely to occur when synthetic fiber yarns are used.)

BAS-341F, 342F

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Contents BAS-341F BAS-342F Safety indications and their meanings Safety InstructionsEnvironmental requirements InstallationCleaning Maintenance and inspectionSewing 1971S Contents Changing Special Functions Name of Each Parts BAS-341FBAS-342F Needle SpecificationsPreparation Before setting upTilting the sewing machine head PositioningConnecting the ground wire Installing the foot switchBelt 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 Sewing Before starting sewingSewing operation 1942S Maintenance and Inspection Cleaning the shuttle hookLubrication 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 needle clearance Adjusting the driver needle guardAdjusting 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