Corrective Measures For The Dog-Eared Belt Loop - JUKI MOL-254 Engineer's Manual

(2) Corrective measures for the dog-eared belt loop

Dog-eared belt loops may be produced as described below. To correct the failed belt loops, first check that
the belt loop receiver components are properly positioned to provide adequate relations anong them. In
addition, consider the following.
1. For light-weight belt loops, slight deviation from the reference does not cause a serious problem in most
cases. For heavy-weight belt loops or stiff belt loops in which an interlining is inserted, even slight
deviation from the reference may result in a serious problem. So, it is necessary to perform the accurate
adjustment of the components.
2. Dog-eared belt loops are apt to be produced when the belt loops are bent. If the pattern of dog-eared
belt loops are not uniform when continuously sewing them or dog-eared belt loops are suddenly made,
check first that belt loops do not have any problem.
3. Belt loops are likely to bend aslant in accordance with direction of texture, resulting in the trouble of dog-
eared belt loops. In this case, the dog-eared belt loop appears as C where the dog-eared portions on
the front and rear are alternately oriented. This trouble can be corrected to a certain extent by taking
corrective measures for C.
4. Positioning of the belt-loop shifter is a decisive factor to determine the finished quality of the belt loop.
This means that positioning of the belt-loop shifter becomes more and more difficult as variation in
width of belt loops become larger, there by making the correction of dog-eared belt loops difficult. It is
therefore recommended to use belt loops that have uniform width.
If belt loops have no defect and the reference position is correct, adjust the related components referring
to the "Cause and corrective measure" in accordance with failures.
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