[amayausers] Re: Upgraded Feed Rollers, Lots of thread breaks

  • From: "Ed Orantes" <e3m@xxxxxxx>
  • To: <amayausers@xxxxxxxxxxxxx>
  • Date: Wed, 4 Jan 2006 20:09:58 -0600

Russell,
    First of all, hats off to you reinstalling your rotary hook.  As far as
numbers go, not too many people can do that correctly.
But sure, a dirty rotary hook can cause the thread to not slip through it's
proper channels like it's supposed to - giving problems along the way.
Theoretically, you want your machine to look and run like it was when it was
brand new.  And they certainly didn't sell you a machine with a dirty rotary
hook.  Now that's not to say one can't run for years without cleaning their
rotary hook and not experience problems.  It all depends on what kind of
sewing you do and things like whether or not you're using spray adhesives
and such.  People who sew on hats most of the time may choose to clean their
RH's more than others because of the buckram fallout.
    Now you may have had nothing more than an adjustment problem.  It is
possible for the rotary hook's setting to slip.  Not common but possible.
(Three screws biting on a round shaft)  And maybe just you taking it off and
putting it back on and setting it would have done the trick.  Or possibly a
combination of the two.  Only Queen Amaya knows and she ain't talkin'.  Oh
well, as long as she' singing...
    Glad you're running better.
Ed
  -----Original Message-----
  From: amayausers-bounce@xxxxxxxxxxxxx
[mailto:amayausers-bounce@xxxxxxxxxxxxx]On Behalf Of Russell Silva
  Sent: Wednesday, January 04, 2006 7:54 PM
  To: amayausers@xxxxxxxxxxxxx
  Subject: [amayausers] Re: Upgraded Feed Rollers, Lots of thread breaks


  To All Techs,

      I tried several different thing to try to fix my thread
fraying/breaking problem and nothing seemed to work so I decided to take the
rotary hook out to inspect it for nicks and scratches and found it to be ok
but what I did notice was it was very dirty from spray adhesive and lint, so
I took it outside and cleaned it with degreaser reinstalled it and now it
seems to work allot better. I will try some more designs tomorrow to make
sure it is ok. Could the rotary hook being dirty cause all the problems I
have been having?

  Thank you for all the help, you guys are great
  Russell
    ----- Original Message -----
    From: Ed Orantes
    To: amayausers@xxxxxxxxxxxxx
    Sent: Wednesday, January 04, 2006 3:53 PM
    Subject: [amayausers] Re: Upgraded Feed Rollers, Lots of thread breaks


    Russell,
        That could be a problem.  When you ask it to give you a material
thickness of 3, you don't want to end up with a 2 or a 1 because the spool
won't let go of the thread.  You should also know that you are experiencing
thread frays.  Could also be caused by a bent needle, too much rotation on
your needle, a scratch somewhere along the threads path under the needle
plate, presser foot up too high, etc...
        If your thread is dancing around too much, you should consider
cleaning your rollers, both red and yellow, and cleaning your bobbin case.
Sounds like you're not getting the tension you're supposed to have.
        Does this happen on all needles or just one?
    Ed
      -----Original Message-----
      From: amayausers-bounce@xxxxxxxxxxxxx
[mailto:amayausers-bounce@xxxxxxxxxxxxx]On Behalf Of Russell Silva
      Sent: Wednesday, January 04, 2006 1:11 PM
      To: amayausers@xxxxxxxxxxxxx
      Subject: [amayausers] Re: Upgraded Feed Rollers, Lots of thread breaks


      Hi Ed,

          I did grease both the red and yellow rollers when I installed
them. When the machine is running I have been watching the tread come out of
the rollers and it does stay centered, when I do get a thread break it seems
to only break half of the thread and sews for a few more stitches (30 to 50)
then completely breaks, I only here the pop when the first part of the
thread breaks, the other thing that happens after the thread breaks and I go
to fix it is the thread seems to be hanging up on the thread spool. I have
checked the thread path and everything is fine it just comes off the spool
with tension at times, some days worse then others. I put a humidifier in
the room with my machines hoping a constant humidity level will help.

      Russell
        ----- Original Message -----
        From: Ed Orantes
        To: amayausers@xxxxxxxxxxxxx
        Sent: Wednesday, January 04, 2006 1:46 PM
        Subject: [amayausers] Re: Upgraded Feed Rollers, Lots of thread
breaks


        Russell,
            It has been my experience where when someone upgrades to the new
rollers, they tend to do the change over -forgetting the importance of one
step.  The lubrication step.  Or maybe they only do half of this step.
Meaning.....

        Most folks are, in fact, putting a spot of polymer grease on the
hubs of the new yellow rollers but they are forgetting to put a spot of
polymer grease on the black shaft where the new red rollers are installed.
You have to understand that this is plastic on plastic with a good bit of
tension between the two on the underside of the shaft.  There is what's
called a "load" (or pressure) placed on this roller and shaft stemming from
the pressure between the red and yellow rollers.  If one installs these red
rollers dry, then what happens next is the red roller isn't allowed to spin
smoothly and, in effect, hangs up as it's trying to spin.  When it hangs up
or stops sporadically, usually for a micro second,
(spin-spin-stop-spin-stop-spin-spin-spin-stop-spin-etc... if you get my
drift) the thread is then forced out to the side of the two rollers.
Usually this is to the left side (has to do with angles and pressures).

        Now that the thread is not pinched as it should, between the two
rollers, and is free to come and go, the next stitch happens sort of like
this.  The needle pushes the thread down thru the needle plate where is
hands it off to the rotary hook.  The RH takes is around the park one time
where now the take up lever takes control and brings up the excess thread
back up and out from under the needle plate area.  This can only happen if
the thread feed rollers are doing their job in holding the thread in one
place.  It's kind of like trying to catch a fish without reeling in the
line.  It will never happen and you'll eventually lose the fish when you run
out of line on the reel.  But in our case, the excess thread now gets
tangled in and around the rotary hook and resulting in what looks like a
birds nest under the needle plate and then a loud pop or snapping sound is
next as the thread eventually breaks violently.

        When ever you get a thread break, you should inspect the thread path
which includes checking under the thread feed rollers. You might just find
that the thread is, in fact, not centered between the two rollers.

        In summary, put a little dab of polymer grease on the red roller
shaft making sure not to put so much where excess spills over both out and
on the rolling surface of the roller(s).  Also clean off the shaft first
with a tissue being sure to remove any old nasty residue that is still on
the shaft.  Doesn't matter what anybody says, residue ain't as slippery as
new fresh grease.

        Keep in mind that at the factory, someone did this originally and
the old red rollers you removed probably has some residual grease still on
them.  But the new rollers you're installing are bone dry.

        Sure hope this solves your problem.

        Ed Orantes
        Amaya, EMT & EMC Technician
        New Orleans, LA
        504-258-6260
        emservice@xxxxxxx




         -----Original Message-----
        From: amayausers-bounce@xxxxxxxxxxxxx
[mailto:amayausers-bounce@xxxxxxxxxxxxx]On Behalf Of Russell Silva
        Sent: Monday, January 02, 2006 5:48 PM
        To: Amayausers
        Subject: [amayausers] Upgraded Feed Rollers, Lots of thread breaks


          Hi All,

              I just upgraded to the new yellow thread feed rollers and now
I am getting allot of thread breaks, the directions said to go up on the MT
but when I do the thread dances around too much in front of the name plate,
the design I was design I was working on is normally set at 4, I have tried
going all the way down to 2 and had the same problem. When the thread breaks
there is usually a popping sound, I checked the hook timing but that seems
to be ok, also new needles. Does anyone have any ideas of what might be
going on?

          Thanks in advance
          Russell Silva
          R. S. Embroidery
          508-222-4433

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