Advertisement
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 mechanic's service call.
What do I check when the thread breaks?
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 tight.
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 "less" direction.
Check to see if the looper 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.
Replace the needle with a new one.
Make sure the needle is inserted correctly.
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 stitch will skip the fabric every
second pass if it is set on 2:1 (skip).
What do I do when too much thread is showing?
Turn the penetration dial gradually towards the "less" position 1 click at a time 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 65/2 for drapery blind stitch hemming – except for heavy block-out.
What do I do when the fabric is gathering?
Adjust the thread tension gradually counter clockwise to loosen the tension.
There are 2 common types of blindstitch needles: LW X 5T & LW x 6T
7100SB/DB use LW X 6T
Advertisement
