TOPICS
Needle trouble and causes
Latch breakage
                    
                    Causes
High-speed, tight-stitch, contact with Y/C, rust, wear, etc.
Latch wear
                    
                    Causes
Poor quality yarn, oil-shortage, high-yarn tension,contact with Y/C, etc.
Latch rivet wear / loose latch
                    
                    Causes
Poor quality yarn, oil-shortage, high-yarn tension, etc.
Hook breakage
                    Causes
Shock wave from high-speed knitting, excessive yarn tension, lint accumulation or slabs, fabric load up, etc.
Hook wear
                    
                    Causes
Poor quality yarn, oil-shortage, high yarn-tension, contact with Y/C, etc.
Lint accumulation
                    
                    Causes
Poor quality yarn, insufficient-air-blowing, excessive wax, insufficient maintenance, etc.
Butt wear
                    
                    Causes
Oil-shortage, bad (abrasive) cam-surface, high-yarn tension, poor quality yarn, insufficient maintenance, etc.
Butt Breakage
                    
                    Causes
Oil-shortage, bad (abrasive) cam-surface, high-yarn tension, poor quality yarn, insufficient maintenance, etc.
Cheek Chipping
                    Causes
Inappropriate latch seat, etc.
Latch bending, Latch going into hook
                    Causes
Operator errors (after press-off, etc), contact with Y/C, etc.
Filamentation
                    Causes
Burr on latch slot edge, insufficient trapping clearance, etc.
Opened Hook
                    
                    Causes
Inappropriate yarn-count, small hook (larger hook needed), insufficient material strength, etc.
Swan neck
Causes
Excessive take-up tension
Oil lines
Causes
Excessive oil, needle bending
Needle lines
Causes
Yarn movement not smooth, poor needle quality, wear, lint accumulation, etc.
Sinker Wear
                    Causes
Poor quality yarn, excessive yarn tension, etc.
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