Brother MD-611 Owner's Manual

 

BAS-300G, BAS-311G, BAS-326G 

71 

•  Please check the following points before calling for repairs or service. 
•  If the following remedies do not fix the problem, turn off the power switch and consult a qualified technician or the place of 

purchase. 

Turn off the power switch and disconnect the power cord before carrying out troubleshooting.

 

If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.

 

Work clamp moves stiffly. 

Apply a suitable amount of grease to the 
sliding parts of the work clamp. 

 

Air tube of presser lifter cylinder is bent 
or damaged (pneumatic work clamp 
specifications). 

Straighten the bend in the tube or 
replace the tube. 

 

Work clamp lift amount setting at 
operation panel is incorrect 
(motor-driven work clamp 
specifications). 

Change the work clamp lift amount 
setting. 

P. 31 

Work clamp arm lever position is 
incorrect. (pneumatic work clamp 
specifications) 

Adjust the position of the work clamp 
arm lever. 

P. 66 

Work clamp arm stopper position is 
incorrect (motor-driven work clamp 
specifications). 

Adjust the position of the stopper. 

 

Cylinder joint position is incorrect. 
(pneumatic work clamp specifications) 

Adjust the position of the cylinder joint. 

 

Adjust the height of the thread wiper. 

P. 63 

The thread wiper is obstructing the 
needle. 

Adjust the stroke of the thread wiper. 

P. 63 

Thread wiper position is incorrect. 

Adjust the stroke of the thread wiper. 

P. 63 

Bobbin winder tension assembly height 
is incorrect. 

Adjust the height of the bobbin winder 
tension assembly. 

P. 22 

Bobbin presser position is incorrect. 

Adjust the position of the bobbin presser.

P. 22 

Stitches being skipped at the sewing 
start. 

Refer to "Skipped stitches occur". 

P. 72 

Upper thread trailing length is uneven. 

Adjust the sub-tension. 

P. 24