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Why is thread not trimming on my multi head? Error 103


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tarix25.06.2016
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Why is thread not trimming on my multi head?

Error 103

An Error 103 indicates that the knives did not return to their start position. One or two possibilities caused this.

 

1) You had a birds nest occur on one of the heads and when the knife tried to do a trim, the silver knife under the needle plate was able to fully open and then could not go back under the black piece.

 

2) Grease has accumulated on the plunger and will not recess back to its original position to be able to fire again on the next trim command.

 

All of the heads on a Multi Head Machines trimming assembly are connected together and are not independent. Let me explain how your trimming system works, that way you will have a better understanding how to correct this.



 

Remove the needle plates from the machine and you will find that under those needle plates are your knives for your trimmer. When the machine executes a trim the silver knife swings out from under the small black piece which has the SWF logo engraved on it, the silver knife then collects the upper thread and the bobbin thread and pushes it under the black piece which does all the trimming.

 

If you had a birds nest occur on one of the heads, then you need to swing the knife out from under that black piece and look for any thread or any debris caught under the black piece which would disallow the silver knife to fully seat under that black piece.



 

All the heads silver knifes are secured to a linkage, which is attached to a thin chrome colored shaft in the back of the machine. When the machine issues a trim command, their is a smaller chrome colored shaft on the right hand side of the machine under the table, that gets fired upwards into a cam that has a groove cut out of it, This smaller shaft is called the PLUNGER, The plunger gets fired upwards by the Trim solenoid. The plunger once fired upwards into the cam then follows the groove as the cam spins, this is what makes the silver moving knife under the needle plate open, At the time the cam has made a full rotation, the plunger as it is called (Smaller chrome colored shaft) falls back into its steel casing, and readies itself for the trim solenoid to fire it upwards into that cam again on the next trim command.

 

Now as I have mentioned both silver moving knives are connected to a linkage on a thin silver shaft behind the machine and under the table. When the plunger gets fired up into the cam, both knives move in unison by way of them being connected to that thin silver shaft. If you were to follow that thin shaft to the right as if you were looking from the back of the machine, you will see a black component that will probably have an LED light attached to the top of it. This black component sort of resembles a tall black screw with some hex bolts on it.



Anyway this black component is part of the trim sensor, in that when the knife opens the black component moves to the left away from the sensor, when the knives close, this same component moves to the right as it is also attached to the same thin silver shaft that the silver knives are connected to. If the knives do not close all the way, then the black component will not be under the sensor above it. This would cause the error 103.

 

Now this plunger fires upwards through an electrical pulse going to the trim solenoid, The trim solenoid then lifts the plunger and pushes it into the cam. As I mentioned once the cam has made a full rotation, the groove is lined up in such a way that gravity causes the plunger to fall back into its housing so that the trim solenoid can fire it back up into the cam at the next trim command. If there is grease on the plunger, than the plunger would not be able to take advantage of gravity to fall fully back into its housing so the trim solenoid can fire it up again at the next trim command. This would cause the thin silver shaft not to fully move to the right, which would cause the sensor to be out of position.



  

This is what you need to do to correct this:

 

1) Remove the needle plates, and note the position of the silver knife. (How far it sticks out from the black piece that has SWF engraved on it)

 

2) Go to the back of the machine, and locate the thin silver shaft under the table. Once you look under the table you will see a thicker silver shaft that has a ton of grease on it, this is not the shaft, look under the table towards the middle of the machine, you will see the thin silver shaft, you will also see the black arms that are attached to it perpendicularly. These are the linkages that connect the silver knives under the needle plate.

 

3) Now grab the thin silver shaft and move it all the way as far as it will go to the left of the machine as you are looking at the machine from the back of it. You may have to use a bit of force as sometimes it is stubborn to move. But you will get it. Once you have done that go to the front of the machine, and you will note that the silver knives are now all the way open. Now is a good time to look under the black piece and see if There's any thread caught under it that may prevent the knifes from closing all the way.

 

Also under that black piece you will see a very flimsy piece of metal that is sort of curled at the end facing the front of the machine. This is called the under thread presser, be sure that this piece is not bent upwards and is causing the silver knife not to close all the way. Let me know if it is or not. Anyway once you have cleared any thread from under that black piece, return to the rear of the machine and move that thin silver bar all the way back to the right, This will cause the knives to close all the way under the black piece.



 

4) Now follow the thin silver shaft to the right, you will soon come to that black component which is the sensor, See if the black screw looking thing is lined up with the sensor just above it, Again it may have a red LED light that lights when the sensor detects this black component. Now we need to look at the plunger to clean off any grease that may inhibit the proper operation of it.

 

Keep following this silver bar to the right, and you will come to the end of it, where you will see that at the end, there is a short black thin linkage connected to it, follow this to the right and you will see that this linkage goes to another black arm, That black arm is attached to a small silver 3 inch shaft, This is the plunger and it vertical where the thin shaft we were following is horizontal. This plunger sits directly under a black cylindrical component which is the cam, you can probably see allot of grease on this cam. You also should see right above the top of this 3 inch silver shaft (plunger) is a groove cut out of the cam. This is the groove that the plunger fires up into.


 5) With a flashlight and a paper towel, remove any grease that is on the sides and top of the plunger. You may want to try to get some cue-tips to help get into the tight spaces. Also remove the grease from the groove of the cam above the plunger. To help you get all the grease out, power off the machine, and grab you 5mm Allen wrench and turn the main shaft on the side of the machine a bit to clear out the grease in the groove of that cam, Turn the main shaft a bit more to get to a new area of the cam to remove any grease. Once you have gone around one whole rotation on the main shaft wheel, (from 100 degrees (red Area) to 100 Degrees) And all the grease has been removed from the cam, it is necessary to oil the plunger which will help loosen any residual grease that may still be lingering on it.


 

6) Oil the plunger liberally, and if you look further back behind the plunger towards the front of the machine you will see another obscure silver shaft that has a black arm attached to it, this is the shaft lever, and it assists the plunger in its lifting up when the trim solenoid fires it up. Make sure it is also free of grease and oil it well too. Now to the bottom left of the plunger you will see a black lever, If you push this lever down you will be able to lift that plunger up. You may have to use a screw driver to push that lever on the left side down as it is a tight fit. If you are able to manually lift the plunger up this way, do this several times to work the oil on the shaft. You should feel the lifting of the plunger get easier and easier.



If you cannot manually lift the plunger than you can do it electronically by doing the following.

  

If you have an LED control panel which does not display the image you are sewing but only provides alpha-numeric information about the design you are sewing, do this.



 

1) Power on the machine, and make sure the main shaft wheel on the side is set to 100 degrees (Red Mark)

 

2) Press the button that has the SWF logo on it (M-Setting).

 

3) Locate the option for MACHINE TEST and press the SET button.

 

4) Scroll down to TRIM TEST, or TRIM SOL. TEST, and press the SET button.

 

5) Press either the START button or any GREEN START BUTTON to fire the trim solenoid.

 
When you press the START button you will hear the trim solenoid fire the plunger up into the groove of the cam, and immediately after that you should hear a second clicking noise of the plunger obeying gravity as it falls back down to its resting position. Make sure you hear two distinct clicking noises. The first one is always louder than the second one, as the plunger is fired up into the cam electrically by the trim solenoid.

 

Press the START button several times to be sure you hear the 2 clicking noises. After about 15 tests, Go behind the machine a place some more oil on the plunger and to the shaft lever behind it, then go back to the control panel and hit the START button and test it again about 10 times.



 

For LCD type control panel find the trim test by doing this.

 

1) Press the TOOLS button. (It may also be MACHINE)



 

2) Select MACHINE and press SET, (If your control panel does not have TOOLS and you've selected MACHINE, then find MACHINE TEST and press the SET button)

 

3) Select MACHINE TEST from the list and press the SET button.



 

4) Scroll down and select TRIM SOL. TEST and press the SET button. (It may also be labeled TRIM TEST).

 

5) Every time you press the SET button or any of the green start buttons you will fire the plunger up into the cam.



 

Once you hear 2 distinct clicking noises then it is time to test the trim function. Turn off both heads by toggling off the switch under the red light on the heads. You will see the red head on indicator lights by looking just below the large tension knobs in the center of the head. Make sure the red light is out.

 

Now perform a few manual thread trims, by either pressing the scissor icon on the control panel or press the START button.



 

Or if you have an LCD type monitor, you need to press the tools button and select MANUAL TRIM then select YES on the following screen.



 

As the machine does its trimming, you need to watch the silver knife as it opens and then closes. Check both heads to watch the knives move. Repeat the manual thread trim as many times as you need to be sure that the silver knives are moving properly now. If they do swing open and then close and you do not get any error 103 codes again, than you are done. Put the needle plates back on and turn the heads back on and continue sewing.



 

Allen Gripton/ColDesi Inc.


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