Just finished timing the feed arm and knotter function on a 24 T that I'm bringing back to work .
Dry run all went as expected, turning by hand counter clock-wise as manual indicates. No interference of needles, and they presented correctly to knotter. Knotter functioned thru all of its' movement, needles returned to home and knotter clutch reset to position awaiting next star wheel signal.
Fed twine thru per directions, tied loose ends to case brace, and again turned flywheel counter clock-wise with release of of star wheel. Needles came up presented twine to knotters they grabbed it and needles returned to "home".
Went to back of case and pulled the twine on left (flywheel) side and it had been cut and was correctly awaiting ram and material, went to right side pulled twine and it was jammed. Looked at its' knotter and saw that the knotter frame had fractured at two points on the frame web. Lower left side fracture was directly across from lower mounting bolt, second was on upper cross frame just below shaft.
Any thoughts on why this might happen?
The fractured frame appeared to be of a newer style material, smoother surface on casting, not the older "cast iron" type. I have a second 24 T that I scavenge parts from and it has both types of frames.
Fx
Dry run all went as expected, turning by hand counter clock-wise as manual indicates. No interference of needles, and they presented correctly to knotter. Knotter functioned thru all of its' movement, needles returned to home and knotter clutch reset to position awaiting next star wheel signal.
Fed twine thru per directions, tied loose ends to case brace, and again turned flywheel counter clock-wise with release of of star wheel. Needles came up presented twine to knotters they grabbed it and needles returned to "home".
Went to back of case and pulled the twine on left (flywheel) side and it had been cut and was correctly awaiting ram and material, went to right side pulled twine and it was jammed. Looked at its' knotter and saw that the knotter frame had fractured at two points on the frame web. Lower left side fracture was directly across from lower mounting bolt, second was on upper cross frame just below shaft.
Any thoughts on why this might happen?
The fractured frame appeared to be of a newer style material, smoother surface on casting, not the older "cast iron" type. I have a second 24 T that I scavenge parts from and it has both types of frames.
Fx