Specifications

19. Install the UTC assembly with the retaining finger tab inside the rotary hook
bobbin basket notch. Install the screws.
Adjust The UTC Assembly
You must adjust the UTC assembly to a level where the needle will not contact the
detection arm during the needle depth procedure.
20. Place the UTC Combination Gauge (p/n 009027-01) from the operator kit
between the retaining tab of the UTC and the notch in the hook basket (see
Figure 3-35). The gauge should fit with no restriction, nor with too much play
(gap should be .020" - .040").
21. Move the assembly against the UTC combination gauge and at the same time,
align the center of the tab to the center of the needle.
22. Tighten the UTC assembly mounting screws, then remove the UTC combination
gauge.
23. Use the key to rotate the hook to the
other two HOOK SCREWS and tighten
each of these screws to secure the hook
assembly.
24. With the correct gap between the retaining
tab of the UTC and the basket of the hook
verified with the UTC combination gauge,
check for a clearance of between 0.008 to
0.012 inches between the UTC detection
arm (shown in Figure 3-36) and the needle.
0.020"
rotary hook
assembly
retaining
finger tab
inner basket
notch
UTC
Assembly
TOP VIEW of UNDER
THE NEEDLE PLATE
centerline
of tab and
needle
C
L
place gauge finger here
to obtain proper gap
needle
gauge finger
Figure 3 - 35
UTC
detection
arm
UTC
assembly
body
Figure 3 - 36
3 - 38 Rotary Hook
EMT 10T Technical Manual Melco Embroidery Systems