![]() Radial 6380A dual span chain clips use the 10249225 spring. ![]() The 10249241 spring performs more consistently between the unworn and worn chain clips.ĭistance to release was the same for unworn and test (worn) clips. (See Appendix 1 for supporting ANOVA analysis)īackward ‘force to release’ performance degrades significantly for the dual span test clips with the 10249111 springs. ![]() The clip measurements were taken using a 2.5mm setup tool since 2.5mm components were used for the wear test.Īssumption: 2.5mm component used for test is a suitable representative to determine chain clip wear.ĭimension A: spring force is not a significant source of wear.ĭim B and C: spring force is a significant source of wear. On the triple clip, a 2.5mm component is engaged only by the left clamp: the left lead by the full clamp and the right lead by the half clamp.įorce and Distance Measurements: See Appendix 2Īppendix 2 shows comparison graphs of unused (unworn) clips versus tested (worn) clips and the effect of wear on performance. and the average distance between component leads was. This is a reasonable result since the tooth width is. As in the case of the dual span clip, wear was observed on the corner radii. On the dual clip, a 2.5mm component is engaged by two clamps: the left lead by the full clamp on the left and the right lead by the half clamp on the right.ĭue to the dimensioning scheme of the triple span clip, dimension C is not tooth width, but distance to the side of the tooth as shown. Therefore, wear was not observed on the sides of the tooth, but was observed on the corner radii. The clip housing “tooth”, dimension C, is. These LED’s have an average distance between leads of. 030 diagonal leaded LED’s were used for the test. Upon completion of the test, force and distance measurements were taken using a test fixture and a 2.5mm setup tool.ĭimensions A,B and C were identified as critical to function (see Appendix 3 for detail). Two chain clip issues drove this experiment: components migrating up and/or down in the clip and concern that heavier springs will accelerate wear. The ANOVA analysis (Appendix 2, page 7) shows however that the number of new components presented to the test clips was not statistically significant and therefore not a significant contributor to wear.īelow is an outline of the five configurations tested: Due to the variation in clamping force of the five different configurations tested, some test heads had components replaced more frequently than others, resulting in some test clips seeing more new components than others. Thirty dispense heads on the Radial 6380A sustaining machine were modified and used for the test. Both dual span and small triple span configurations were included in the test. The purpose of this experiment was to determine the wear on three critical to function chain clip dimensions due to three springs of equal free length and different spring constants, and also to analyze the wear effects on functionality.
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