Brother International PR670E Operation Manual - Page 224

Symptom Probable Cause/Remedy Page The upper thread comes out of the needle when embroidering begins. If a short length of thread remains after the thread is trimmed, the needle may become unthreaded when embroidering begins again. • Set the remaining length of thread to "Long p.185 Tail" on the second page of the settings screen. The upper thread does not reach the bobbin thread when embroidering begins. There is no more thread in the bobbin, the thread does not feed from the bobbin, or the thread that is fed from the bobbin is too short. p.33 • Correctly thread the lower thread. Although the thread is not broken, a broken thread error occurs and the machine stops. If the thread breakage sensor in the thread tension disc of the thread tension knobs cannot detect that the thread is being fed, even if the machine is running, a broken thread error occurs and the machine is stopped. If the thread came out of the thread tension disc, even though the thread is not broken, the machine detects that the thread is not being fed and stops. p.52 p.213 • Clean the tension unit. Correctly pass the thread through the thread tension disc. If the broken thread error occurs after the machine is cleaned and rethreaded, the sensor may be damaged. Consult your nearest authorized Brother dealer. The thread is worn. Lint or dust has accumulated in the thread tension disc. • Remove the tension dials, and then remove p.213 any lint or dust accumulated between the felt washers. Jumpstitches are long. Lint or dust has accumulated in the thread tension disc. • Remove the tension dials, and then remove p.213 any lint or dust accumulated between the felt washers. There are needle cuts or holes in the garment. The needle is dull. • Replace the needle. Dull needles have a p.30 difficult time passing through the garment, p.79 causing fabrics to tear. The fabric is too delicate. • The simple penetration of the needle could damage delicate fabrics. Use stabilizer on top p.204 of fabric. Symptom Probable Cause/Remedy Page There is puckering in the fabric. The thread tension is too tight. • Adjust the tension according to the type of fabric and thread being used. Polyester thread will stretch during sewing especially if the tensions are set too high. After the p.103 stitching is complete, the thread returns to its original strength, causing puckers in the fabric. The framing tension of the fabric is incorrect. • Tightly frame non-stretchable, woven fabrics. Loose framing will cause the fabric to bunch up under the stitching. p.203 Tautly frame soft knits using a stable backing. Overstretching the garment will cause it to look puckered when the frame is removed. The column stitches are too long. • Re-digitize the design with fill stitching or - with multiple rows of column stitching. There is puckering in the fabric. The needle is dull. • Dull needles push fabric down and damage material. Replace the needle. p.30 p.79 The design density is too heavy. • Too many stitches in an area pull fabric, causing it to pucker. Slightly decrease the p.184 design density by 5% to 10%. The LCD cannot be read. The LDC screen is too bright or too dark. • Adjust the brightness of the screen display. p.179 When embroidering thick fabric, the fabric cannot be correctly hooped. Fabric slips within the frame because of its thickness. • Wrap masking tape or bias tape around the p.203 outer frame. The tape will provide resistance so that the fabric does not easily slip. CAUTION • This machine is equipped with a thread detecting mechanism. If the machine is not threaded with the upper thread, the machine will not operate correctly, even if the start/ stop button is pressed after unlocking the machine. • If the machine suddenly stops: • Turn off the machine, and unplug the power cord. • Restart the machine with the correct operating procedure. Refer to page 35. 222