Specifications

Trimmer Option
The trimmer option for the EMC 10/4 Embroidery Peripheral is assembled and
thoroughly tested before the machine is shipped. Although the set up of the
trimmers should not change during normal use, there are a few things to be aware
of to prevent problems.
• Dirt, dust, and thread lint debris can build up and prevent the movable
knife (in the rotary hook assembly) from actuating correctly. Keep the
area clean and you shouldn’t have a problem. If for some reason you find
that the movable knife is out of adjustment a procedure for adjusting it is
presented in this section.
• Thread birdnesting around the rotary hook, picker, and UTC sensor arm
could cause the knife and/or picker, to become misadjusted.
• The trimmers are operated independently on each of the 4 embroidery
heads. If the heads are not synchronized to each other, not only will the
embroidery quality be effected, but the trimmers are likely to display
marginal operational characteristics as well.
Sequence of Trim Events
During the trim function, many events occur with a set timing sequence to enable
the trimming action to be successful. The following steps provide you with a very
general outline (and sometimes brief descriptions) of the major actions that take
place during the trim function.
1. While embroidering a design, the trim function is initiated when the embroidery
peripheral detects the design code for: a color change, a trim, a set number of
consecutive jump stitches, or the end of design.
2. The heads will slow to about 100 stitches per minute, which is the speed range
for the trimming action.
3. The picker engages with the current thread loop as it is being formed in the
hook and bobbin area. This process is required to provide the correct length for
restarting the embroidery next time this thread color is used.
4. The movable knife comes forward to the ready state for trimming. During its
forward movement, it separates the top thread from the thread that is looped
around the hook. It is here where it "selects" the top thread and bobbin thread
for trimming.
5. When the movable knife returns to the "home" position, the selected threads
will be cut between the movable knife and the spring knife.
6. The beam makes two moves that clears the top thread (now called the tail) out
of the material.
2 - 30 Head Section
EMC 10/4 Technical Manual Melco Embroidery Systems