Beaters and Flyshuttles

TABLE 5 / BEATERS AND FLYSHUTTLES

Symptom	Possible Cause	How to fix it
A) Shuttle flying off the track.	1) Shuttle boxes are out of adjustment.	a) Single Box Flyshuttle: Bridge the Shuttle Race and Shuttle Box with a ruler or other straight edge. They should be in perfect alignment. If one is lower than the other, loosen the Shuttle Box and reposition it. If you need help, go to the installation instructions in your manual.
		b) Double or Four Box Flyshuttle: In the same way, check the position of each of your shelves relative to the race. If you have a problem, make the necessary adjustment at the turnbuckle in the cable that attaches to the shift handle; bring the shelves up or down. You may need to loosen the brass screws (motion limiters) top and bottom of the box carriages in order to create enough room to make this adjustment. Be sure to retighten them once you've corrected the elevation problem.
	2) Your shuttle is hitting the end of the reed.	Insert small shims in the grooves that hold the reed into the race and beater top so that the end of the reed is deflected backwards.
	3) Tensioner in your shuttle is not adjusted.	The advantage of an end-feed shuttle is that it allows you to tension the feed of your yarn. Most shuttles of this design have adjustable tensioners. Be sure yours is set to match the characteristics of the yarn used.
	4) Bobbins not wound consistently.	If it's soft on the end and the wraps collapse and pull into one another, you will have to wind it again. Use an AVL Bobbin-Winding Guide.
B) One side of your fabric is beaten more tightly than the other even if you are holding your beater in the middle. You have a diagonal beat line rather than horizontal.	Your beater is out of alignment.	To check, push your beater all the way back against the Beater Bumper Blocks, it should strike both sides at exactly the same time. If it doesn't, you'll need to rack the beater.