Specifications

Changing A Check Spring
1. As described in the previous procedure, remove the thread tensioner associated
with the check spring that is being changed.
2. Remove the old check spring and discard it.
3. Attach the new check spring as follows:
a) Position the check spring around the end of the tensioner shaft as shown
in Figure 3-13.
b) Insert the straight length of spring wire that is inside the check spring coil
into the groove cut in the tensioner shaft as shown.
4. While holding the check spring in position, place the thread tensioner into the
tensioner bracket. Insure the tensioner shaft seats into the smaller diameter hole
in the bracket with the check spring still positioned on the tensioner shaft
properly.
5. After inserting the thread tensioner into the tensioner bracket, perform the
thread tensioner check spring adjustment. This adjustment procedure, not only
adjusts the check spring tension, but secures the thread tensioner in the
tensioner bracket by tightening the set screw loosened to remove the thread
tensioner.
Check
Spring
Thread
Tensioner
straight spring
wire into groove in
tensioner shaft
Thread
Tensioner
shaft
Figure 3 - 13
3 - 14 Thread Tensioner Assembly
EMT 10/4T Technical Manual Melco Embroidery Systems