Brother BAS-761 instruction manual Adjustments, Needle-bar height adjustment

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10. Adjustments

10. Adjustments

CAUTION

Maintenance and inspection of the sewing machine should only be carried out by a quali- fied technician.

Ask your Brother dealer or a qualified electri- cian to carry out any maintenance and inspec- tion of the electrical system.

Turn off the power switch and disconnect the power cord from the wall outlet at the follow- ing times, otherwise the machine may oper- ate if the foot switch is depressed by mistake, which could result in injury.

¡When carrying out inspection, adjustment and maintenance

¡When replacing consumable parts such as the rotary hook and knife

Hold the machine head with both hands when tilting it back or returning it to its origi- nal position. Furthermore, after tilting back the machine head, do not push the face plate side or the pulley side from above, as this could cause the machine head to topple over, which may result in personal injury or dam- age to the machine.

If the power switch needs to be left on when carrying out some adjustment, be extremely careful to observe all safety precautions.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they oper- ate correctly before using the machine.

Note:

¡Turn the power switch off if the adjustment does not need power to be supplied.

¡If the power switch is turned on, take sufficient safety measures, such as to make E-800 (emergency stop) come on in the manual mode.

10-1. Needle-bar height adjustment

q

	BAS761	1
	2.	1
	2.
	4	2
		2

ow

er

Gauge 1 (x2.4 rotary hook)

		!0
		!2	!1
			!1
i
u	t		q
			q

y

When needle-bar q is at its lowest position, the lower end of needle-bar q must be matched the end of gauge 1.

1.Remove flat-head screws w and then needle plate RR e and needle plate RL r.

2.Loosen the screw t and then remove the needle y.

3.Remove screw u and then presser foot assembly i.

4.Remove screws o and then bottom-plunger !0.

5.Remove oil cap !1and screw !2, adjust the height by moving needle-bar q up and down.

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BAS-761

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Contents BAS-761 Safety Instructions Environmental requirements Installation Cleaning Thread take-up cover Belt cover Guard bar Contents Names of Machine Components Names of Machine ComponentsSpecifications Installation Installation of the machine tableInstallation of the spool stand Removal of the fixing bolts from the machinePositioning of the front supporter Connection of the foot-switch connectorConnection of the air hose Installation positions for operation box and switch box Installation of the folding group assembly Before installationLubrication Upper threading Installing the needleCorrect operation X2.4 rotary hookRemoval of the bobbin Bobbin case threadingRemoval of the bobbin case X2.4 rotary hook X1.7 rotary hookBobbin thread winding Thread tension Thread take-up spring X2.4 rotary hook X1.7 rotary hookButton functions Operation box panel buttonesButton functions Sewing Speed button Thread Monitor button Thread Monitor indicatorTest button Test indicator Counter buttonEnter button Cancel buttonButton functions Bobbin Change button Arrow keys@0 Start button Switch box panel buttones@1 Reset button @2 Emergency Stop buttonFoot switch Restart buttonesSetting the sewing speed and the bar tacking speed Settings before sewingSetting the folder mode Settings before sewingTack Speed 3000 rpm Setting the lower thread counter Replacing the lower threadSetting the piece counter Setting the stacker roller feed amountSetting the date and time Change date DATE1998/10/1 Screen Change time TimePreparation for sewing Preparation for sewingRead sewing data Sewing with the folder in automatic mode SewingSewing with the folder in pattern matching mode Sewing with the folder in label attachment mode Sewing with the folder in step mode Test feeding To continue sewing Emergency stopTo stop the machine during sewing To interrupt sewing and return to the standby positionAdjustments Needle-bar height adjustmentPresser foot height adjustment Needle and rotary hook timingRemoval of the movable knife Removal of the fixed knife and the movable knifeRemoval of the fixed knife Stacker position adjustment Sewing clamp assembly number selection Sewing clamp assembly numberDIP switch positions Using the DIP switchesUsing the DIP switches Functions of operation panel DIP switchesUsing the DIP switches Table of error code Error code Contents Reset Emergency Stop button pressed 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone