Melco EMT 10T Specifications download pdf (Page 120)

Sew Test

We now must actually embroider onto properly hooped material to prove the

adjustment is proper. A special design named UTCTEST comes on a disk with your

machine. Load the design into your EDS software or disk drive and send it to the

sewing peripheral.

The primary purpose of the UTC is to signal when the bobbin thread runs out or

breaks. The UTC has a mechanical arm that is bumped by the bobbin thread during

every stitch. When the sensor is not bumped for the number of consecutive stitches

that are set as "Bobbin Count," the machine stops, backs up, and beeps.

If the UTC is too close to the needle, it may not react reliably in detecting the

absence of bobbin thread. If the UTC is too far away from the needle, it may falsely

indicate that the machine is out of bobbin thread when it indeed has bobbin thread.

Additionally, if the bobbin tension is set too loose, it may also falsely indicate that

the machine is out of bobbin thread when it has bobbin thread.

Preliminary Checks

The following must be checked before performing the embroidering:

1. Check that the bobbin tension is within the proper adjustment specifications as

described in the operation manual.

2. Verify that the BOB. COUNT in the BOBBIN MENU is set to 5.

Perform The Test

During the embroidering:

A) Check that the UTC detects an absence of bobbin thread when you run out of

bobbin thread and displays the CHECK BOBBIN message.

1. Test for this by wrapping a foot or so of thread around an empty bobbin.

2. Embroider the test design until the thread is completely used.

3. Repeat steps 1 and 2 until the bobbin runs out at least once in both

directions of diagonal stitching in the test design.

4. If the sensor does not detect when the bobbin runs out of thread, slightly

loosen the UTC sensor body at the screws shown in Figure 4-26, and at

the slotted screw hole (left side) move the sensor

a very small amount

away from the needle. Re-tighten the screws.

4 - 32 UTC Adjustments

EMT 10T Technical Manual Melco Embroidery Systems

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Melco EMT 10T Specifications Page 120