Brother International Innov-is BQ950 Operation Manual - Page 129
Make sure that you fit the bobbin case
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Troubleshooting Remove any threads in the race and around the feed l dogs. Turn the handwheel to raise the feed dogs. m Align the two screw holes in the needle plate with the n two holes at the needle plate mounting base, and then fit the needle plate onto the machine. Lightly finger-tighten the screw on the right side of the o needle plate. Then, use the L-shaped (or disc-shaped) screwdriver to firmly tighten the screw on the left side. Finally, firmly tighten the screw on the right side. 1 S mark 2 z mark 3 Bobbin case • Make sure that the indicated points are aligned before installing the bobbin case. Turn the handwheel to check that the feed dogs move smoothly and do not contact the edges of the slots in the needle plate. CAUTION • Never use a bobbin case that is scratched, otherwise the upper thread may become tangled, the needle may break or sewing performance may suffer. • Make sure that you fit the bobbin case properly, otherwise the needle may break. A Attach the needle plate cover according to step j in q "Cleaning the race" on page A-2. Check the condition of the needle, and then install it. r If the needle is in a poor condition, for example, if it is bent, be sure to install a new needle. • Refer to "Checking the needle" and "Replacing the needle" in the "Basic operations" section. MAINTENANCE AND TROUBLESHOOTING 1 Correct position of feed dogs 2 Incorrect position of feed dogs Note • Be careful not to drop the removed screws in the machine. p Ibnosbebrtinthceasbeoablbiginnscwasiethsothtehazt thmeaSrk mark on the on the machine. CAUTION • Never use bent needles. Bent needles can easily break, possibly resulting in injuries. Note • After completing this procedure, continue with the following procedure in "Checking machine operations" to check that the machine is operating correctly. a b a b Memo • Since the needle may have been damaged when the fabric was caught in the machine, we recommend replacing it with a new one. • Align the S and z marks. Appendix A-9