Singer HD6600C, HD6605C Instruction Manual

To thread the Singer HD6600C/HD6605C, start by raising the presser foot and turning the handwheel towards you until the needle is at its highest position. Follow the threading path indicated on the machine, ensuring the thread passes through the tension discs and the take-up lever before threading the needle.
If the machine skips stitches, check the needle to ensure it is the correct type and size for the fabric. Also, make sure the needle is not bent or dull. Re-thread the machine, ensuring the thread is properly seated in the tension discs, and confirm that you are using the correct type of thread.
Regularly clean the machine by removing lint and dust from the bobbin area and feed dogs using a small brush. Oil the machine as per the manual's instructions, focusing on the shuttle race and other moving parts. Always unplug the machine before cleaning.
Thread breakage can be due to incorrect threading, using low-quality or old thread, or excessive tension. Re-thread the machine, ensuring the thread is correctly placed in the tension discs, and check the tension settings. Also, inspect the needle for damage and replace it if necessary.
To adjust the tension, use the tension dial located on the front of the machine. For balanced stitches, adjust the dial until the upper and lower threads interlock in the middle of the fabric. Test on a scrap piece of fabric before sewing your project.
Loud noises may indicate a need for cleaning or oiling. Turn off the machine and inspect the bobbin area for lint buildup. Clean it out and oil the machine according to the manual. Ensure the needle is correctly installed and not bent.
Uneven stitches can result from incorrect tension, improper threading, or a damaged needle. Start by re-threading the machine, checking the tension settings, and replacing the needle. Also, ensure the fabric is being guided evenly during sewing.
To change the presser foot, raise the presser foot lifter and press the black lever at the back of the presser foot holder. Align the new foot with the holder and lower the presser foot lifter until it snaps into place.
Yes, you can use twin needles with the Singer HD6600C/HD6605C for decorative stitching. Ensure the machine is set to a straight stitch and the stitch width is zero to prevent needle breakage. Consult your manual for threading instructions specific to twin needles.
To replace the light bulb, unplug the machine and remove the faceplate. Carefully unscrew the old bulb and replace it with a new one of the same type and wattage. Reattach the faceplate and plug the machine back in.