Sewing machine maintenance fault fault line mark
1. The line is floating
Analysis: the thread clamp pressure is too small. Methods: tighten clamp line, cotton thread tension.
2. The bottom line is floating
Analysis: robbin spring is too loose. Processing method: tighten robbin spring screw, increase the bottom line tension.
3. The stitch length is short
Analysis: the presser foot pressure is too small. Processing method: tighten the tensioner.
4. Each needle sewing the material below cable set, towel line set of shaped
Analysis: feed and pick line of action.
Processing method: adjusting the feed CAM screw, feed and the pick line action humorous.
Sewing machine repair failure breakage failure
1. The thick broken stitches
Analysis: needle carefully or bending, sewing the material thickness is uneven, needle bar move too much.
Methods: a new coarse needle, adapt to slow down hand sewing speed and feed, a new needle bar or needle bar set.
2. Short stitch needle, needle breakage
Analysis: feed dog lag, unqualified feed dog, needle touch back-end feed dog and needle breakage.
Methods: should adjust the position of the feed CAM, shorten appropriately stitch or a new feed dog.
3. The needle broken under the needle plate
Analysis: the needle position is low, needle touch the spindle, spindle bed not installed, set spindle tip touch needle, runs against needle side gap is too small, or both sides
Is too large, runs or lose protect touch needle effect. Methods: adjust the position of the needle bar or needle turntable runs and runs
With needle end clearance.
4. The needle broken above the needle plate
Analysis: hand sewing the material too hard, cause bending machine needle, presser foot screw loosening, the presser foot skew touch needle, the feed CAM displacement
Sewing the material tensile machine needle, sewing the material with hard objects make touch broken needle.
Processing method: strengthen the operating practice, the positive pressure feet tighten screw, adjust the feed CAM screw location.
