Brother International BES-1240BC Instruction Manual - English - Page 259

Chapter 12 Trouble Shooting Check these points once again Problem Machine operation abnormal Check Point • Is any set screw of the rotary encoder loosened? • Is any set screw of the machine pulley loosened? • Is any set screw of the machine motor pulley loosened? • Is the XY carriage belt loosened? • Is the XY carriage belt damaged? • Are any set screws for the XY pulley loosened? • Are any set screws for the coupling of the XY pulse motor loosened? • Is embroidery data normal? Upper shaft locks at a certain point in one cycle • Is the thread take-up stopped due to interference with the upper case cover? [Adjustment] Thread take-up Upper case cover Bolt Needle case Thread guide Thread take-up operating lever Loosen the hexagon socket head cap screw of the thread takeup operating lever and adjust the take-up movable range. Tighten it securely afterwards. • Are the needle bar clamp and the top dead center stopper positioned correctly? "E-b1" error display • Check the rotary hook of a machine head whose MENDING lamp (green) is blinking to see if the thread is caught. [Adjustment] 1.Take out the thread tangled in the rotary hook race so that the rotary hook can be rotated forcibly by manual operation. 2.Check that the machine pulley is set to 100˚ of the scale, and press the END switch. [Measures] 1.If the thread end is left too long or stitching is left loosened before starting embroidering, the thread is caught in the machine and operation stops. 2.When starting embroidering, hook the thread end on the spring or hold it with a hand. 3.Leave thread of about 60 ~ 70 mm from the needle hole when starting embroidering. Upper shaft pulley does not turn. Stitches cannot be made. • Is the presser foot lifted at a retract position when the power is turned on? Lower the presser foot for the four machine heads using the lever. • Is the needle attached properly? • Is the timing of the needle and rotary hook correct? BES-940BC • BES-1240BC 257