Reliable MAESTRO 600SB, Instruction Manual, Page: 27 / 32

FREQUENTLY ASKED QUESTIONS - BLINDSTITCH SEWING MACHINES
Sewing machine operators can often help themselves when their machine does not operate properly. Here
are some simple instructions, which if properly used, can save you time and a mechanic’s service call.
What do I check when the thread breaks?
The recommended thread for blind hemming is Polyester 68/2.
Poor thread quality (too old, or not strong enough) can cause the machine to skip stitches or break the
thread.
Make sure you are using the correct needle system, See owner’s manual.
Check for defective needle (burr or blunt).
Check for incorrect passing of the thread.
Check thread tension , could be too loose.
What do I check when the needles are breaking?
Select the correct needle size for the type of work being done.
Make sure the needle is inserted correctly.
Make sure you are using the correct needle system, See owner’s manual.
The ridge-forming disc may be set too high. Gradually turn the dial regulator in the direction (less).
Check the looper if it is deflecting off the needle as it travels pass the needle.
What do I check when the thread skips?
Select the correct needle size for the work being done.
Make sure the needle is inserted correctly.
Make sure you are using the correct needle system, see owner’s manual.
Check for incorrect passing of the thread.
What do I do when the needle skips the fabric?
Turn the penetration dial gradually towards the “more” position for greater penetration – the calibrated
numbers on the dial can be noted and used for reference position for the same types of material for quick
adjustment.
Check to see if the needle is blunt or damaged, replace with new one.
Check to see if the machine skip device is set on 1:1 (no skip) or 2:1 (skip) the machine will skip the fabric
every second stitch if it is set on 2:1 (skip).
What do I do when too much thread is showing?
Select the correct size needle for the type of fabric.
Turn the penetration dial gradually towards the less position for less penetration of the needle through
the fabric being stitched.
Check the thread tension. Could be too tight or the thread size is incorrect.
Check the thread being used.
We recommend Polyester 68/2 for basic blind hemming.
What do I do when the fabric is gathering?
Adjust the thread tension gradually counter clockwise to loosen the tension.