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At what degree should i adjust the main shaft for adjusting the needle bar driving CAM?

Adjusting needle bar driving cam

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  • Sewing Machines Master
  • 626 Answers

WHEN THE MACHINE IS SET ON THE LONGEST STITCH THEN AS THE FEED DOG GOE UNDER THE NEEDLE PLATE THAT IS WHERE THE POINT OF THE NEEDLE SHOULD BE GOING UNDER THE NEEDLE PLATE. THIS NEEDS TO BE VERY ACCURATE.

Posted on Nov 17, 2014

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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: my needle is hitting the face plate and breaking

Make sure the needle is all the way up in the shaft/bar. It can work loose and slip down. Make sure you're installing the needle correctly.

Posted on Nov 26, 2008

  • 5 Answers

SOURCE: replace a motor belt for sewing machine

The top tension is dependent not just on the tension dial, but also on the little disks that you go through to thread the machine. If it is not threaded correctly, you will get bunching underneath. Sometimes I just have to rethread the machine-- when you get to the disks- hold the thread taut and push it through the disks before going up to the arm part. Here is a threading picture I found- but it doesn't point out the disks too much. Once the machine is stitching nicely, then the tension dial can be used to flatten out the stitches.
http://www.sewusa.com/Threading_Diagrams/Threading_Pages/Singer_Sewing_Machine_Threading/singer_900_futura_threading.htm

Posted on Mar 14, 2009

  • 18 Answers

SOURCE: singer 2210/replaced gear/now needle bobbing cam out of sync

look here:
http://www.vacsew.com/repair/singer-600-timing.html

Posted on Oct 06, 2009

  • 78 Answers

SOURCE: How do I adjust the needle shaft position on my

take the end cap off and follow the needle bar up until you see a block with a screw in the middle of it.bring the needle bar down useing the handwheel to its lowest position loosen the screw and you should be able to move the needle bar if you have a needle threader you can use it to reset the height of the needle bar just bring the threader down and then lower the needle bar to where the threader fits into the eye of the needle like it would if it were being threaded

Posted on Jul 01, 2010

  • 1788 Answers

SOURCE: will not pick up bobbin thread. problem begin

I would try cleaning the area with some alcohal on a cotton swab and change needle. You may have caused a problem with your timing, I hope not because you will need it to be set again by your authorized center. I know there are directions on the internet but I would rather make sure that it is done right,and knock out your warranty. You have a nice machine.

Posted on Sep 26, 2010

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Singer model 7-33 that has a pin sheared off and when replaced machine out of time. pin removed machine works but have to stop after about 8 strokes and pull thread snug or rat nest on bobbin side


indicates that the top tension is not tight enough
you can check the needle to hook timing yourself
by hand turn the machine over until the needle is in the fully down position
just as the needle starts to rise the hook should be at or just next the eye of the needle so that a fraction more turning places the hook over the eye of the needle
it that is not the relationship of the needle and hook adjust the needle cam on the shaft at the end of the machine or take it to a sewing machine repair shop to have it adjusted

Dec 29, 2016 | Singer Sewing Machines

1 Answer

Supply of new stitch cog for Bernina 830 Record


I don't know what a stitch cog is by your definition but I suspect that you may be referring to the cam stack worm gear, part # 310 007 03. These gears are available, however those produced and sold as after market parts online have ranged from bad to very bad. I would suggest that you find an OEM part (not a reproduction) that are still available from time to time on EBAY etc.
Changing the gear is not as straight forward as it may look. The proper replacement requires: 1. removal of the cam stack without damaging the machine parts, 2. removal and installation of the new gear with the correct alignment of the individual cams, 3. installation of the cam stack and pattern indicator without axial play, 4. correct parabola timing of the main-shaft worm wheel and cam stack gear, 5. synchronization of the zigzag and automatic cam parabolas, 6. pattern indicator timing, 7. checking and adjusting the automatic needle position. SewTechnical Home

Jun 14, 2014 | Bernina Sewing Machines

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Bernina 730 just got and has been sitting for years. belt squeals and needle positioning loose.... What can I do to fix this?


If the needle lateral position is loose (zig-zag), the usual candidate is the position adjusting cam which is a small knurled knob on the right-hand-side of the needle bar and just visible below the sewing arm. It is secured in place by a small screw, but it also needs to ****-up against the control arm that comes out of the main mechanism very snugly otherwise you get alot of movement in the linkage. If not used/maintained for a long time, this positioning cam almost-invariably gets seized as well, so it tends to be a bit fiddly, mainly because of where it is. I usually have to resort to removing the needle bar as well, which has its own problems, so it's not really a job for the amateur. Belt noise is usually worse with the pale brown toothed type and, dare I say it, a VERY slight rub along the a small section of both edges with a piece of solid soap very often will quieten a very noisy belt down, but PLEASE dont overdo it ... you really dont want to contaminate the Vee groove with a big wad of mums bath soap ... wont do the machine any good at all !!!

Jan 12, 2012 | Bernina Sewing Machines

1 Answer

How to check timing on pe180d embroidery machine


In case of adjusting sewing machine timing, there are twomain parts that you should follow.To adjust the hook needle timing on the rotary hook, first,remove the bobbin, bobbin carrier, and covers so you can see the movement ofthe hook. This may involve removing the needle plate for top loadingassemblies, or removing the hook cap from the front of the machine. Itoften requires the removal of the lower covers to reach the componentparts. Adjust as needed when doing sewing machine repair.Set the machine to a straight stitch at the defaultposition. Different models have different default positions including themost common far left and center positions. If no problems are perceivedin needle bar positioning, the default position will suffice. If thereare needle bar position issues, these need to be adjusted prior to adjustingthe timing. Follow proper sewing machine repair procedures.Rotate the hand wheel toward youuntil you see the needle reach its lowest position and begin its rise. Now lookfor the point of the hook as you continue rotating the hand wheel. Thepoint of the hook should strike inside the needle scarf above the needleby about 0.5mm. Sewing machine repair is vital for smooth operations.Check to see if the hook fails topick up the thread. Double check the needle bar positioning including thehook needle spacing. If these are appropriate and the point of the needlestill fails to pick up the loop thread, proceed to adjust the timing of thehook. Maintain regular sewing machine repair. Look for the lower drivemechanism. It may be a lower shaft with gears on either end. If this isthe case, look to the right end of the shaft for a gear with adjusting setscrews. Loosen and manually adjust the position of the hook. Tightly hold thehand wheel while turning the drive shaft to set the proper position. Retighten adjusting screws. Some models have timing beltsthat control the timing of the sewing machine. Look for a belt connectedon each with to drive gears. Look for work cogs on the belt. Inmost cases, you can reset the timing belt, without replacing it. If,however, the belt requires replacement you will need to do so. Loosen the drive mechanism on the right side to free the movement of the belt.Manually adjust the position of the hook to the needle and re-tighten set screws. This knowledge is vital for effective sewing machine repair.Once the timing has been reset,conduct thorough test sewing on the sewing machine to make sure everything isworking properly.Hope this will help you. Good Luck.

Oct 16, 2011 | Brother Disney PE-180D Computerized Sewing...

1 Answer

My Babyloc serging machine does not feed the material through! The teeth appear not to move the fabric. I have taken off the plate to see if any fabric is underneath, but there is no dust or fluff. The...


I had this same problem with a Babyloc machine. The two hex set screws that hold the feed dog assembly to the drive shaft may have worked loose. You can confirm this by turning the machine by hand and observing the movement of the feed dogs. Tighten the hex screws using the correct size Allen key. You will most certainly need to adjust machine's timing. When working properly the feed dogs should rotate front to back in an elliptical pattern, remaining down during the down cycle of the needles. If the set screws have worked loose you may also have a problem with the stitch length adjustment cam (located on the left side of the machine.) This problem will manifest in a machine that is locked up or slows down during use. When dry the cam will heat up, expand and seize within its bearing sleeve. To fix this problem you will need to remove the small plastic cap (with red arrow) covering the screw securing the cam. It is usually also necessary to remove the connecting rod/sleeve that the cam rides in. Once both of these parts have been removed, you will need to carefully separate them and resurface the inside of the sleeve. This can be done with a very fine (500grit or higher) emery paper. Once the cam fits inside the sleeve without binding, reassemble using sewing machine oil or lithium grease and adjust feed dog timing.

May 17, 2011 | Baby Lock Sewing Machines

2 Answers

Bernina 730 cam gear replacement and alignment


It does not matter where the position of the camstack is when you put it in, it should not affect any other part of the machine.

Jan 30, 2010 | Bernina Bernette 75

1 Answer

The stitch size has gone very small ,they are about 2-3 milimeters apart they should be about 3cms apart


I'm not sure how familiar you are with the mechanics of the machine but I will try to explain.
1. The feeddog may have moved out of place. This is the part that has the teeth on it that feeds the material through. Turn your handwheel until the teeth are as low as they will go. Hit your knee press and look underneath and see if the full tooth is showing. If the full tooth is not showing the machine will not feed properly. I've worked on hundreds of US blindstitch machines, but only one Tacsew. There should be two screws that will allow you to adjust the feeddog. Be sure to check it by turning the handwheel. Also look to see if it clears front to back as well.
2. The other problem could be the stitch adjustment cam came loose. On other blindstitch machines it is located at the main shaft under the left cover. If you follow your looper drive shaft to the back where it meets the main shaft there should be a cam (it looks like a ring or thick spacer from your vantage point). On it should be numbers with a mark to show how many stitches per inch. On this cam there should be two screws. Loosen these to adjust to desired stitch length.
Jay

Feb 20, 2009 | Tacsew T500

1 Answer

Zigzag won't enlarge


See if there is a twin needle lock out setting, if it is on it will cause this symptom. Otherwise there may be a bind in the needle pivot or linkage system to the needle bar from the cam or stepper motor (I don't know if this is a mechanical or electronic machine).
Good luck!

Feb 01, 2009 | Janome Sewing Machines

1 Answer

Singer 758 adjustments for needle position and stich width


Found this below that may help confirm timing? As for the zig zag one thought is to check for end play in the upper shaft. At the left hand end of the shaft (under the top cover) there is an white plastic "bushing" with one slotted screw - this can be adjusted to take up the slack. It is possible that this bushing is split by the screw which may make it come out of adjustment. Check the other collars on this shaft are tight (hex) - by the belt and near the drive gear. P.S. double check the zig-zag cam is in the correct position (set to straight sew - centre position to install the cam - check instructions).

Timing
Turn the handwheel towards you until the needle is in the lowest position and observe two lines on the needle bar at the place where it comes out of the machine. You have to see these lines. When you find those, you have to tilt the machine on its back and you will see that on the right hand side there is a belt coming down onto a gear like piece on the timing shaft. Move your eyes to the left and the next thing that you will see is a large round gear on the feed shaft. Now that we have determined the difference between the feed shaft and the timing shaft, follow the feed shaft to the left and there will be a small metal piece there with two metal screws on it. Next to that to the left is a stationary metal peice that has a bump on it. You must see these two things to adjust your machine.

Now, to determine if your machine is out of time, turn the handwheel towards you (always turn it towards you) until the needle is in the lowest postion again. Observe the two lines on the needle bar, turn the handwheel toward you until the bottom line goes in the exact place where the top line was. Now look at the needle and hook. The hook should be directly behind the needle. If it is not, we go back to the bottom of the machine on the gear like metal piece that the belt rides on and loosen the two screws that are in the piece. Now if you will remember, this is on the timing shaft. When these two screws are loose, the hook will become moveable. Place the tip of the hook directly behind the needle without moving the needle bar (remember that the needle bars bottom line was placed where the top line was). When you have accomplished this, tighten the screws on the belt gear.

Now you have to determine whether the feed is in time. Again, place the needle in the lowest postion, rise the low line to where the top line was, and see if the line on the feed shaft is directly next to the bump on the stationary metal piece. If not, without moving the handwheel at all (because it must stay in this position to time it), loosen the two screws on the feed shaft piece and align the two lines together. Then tighten the two screws, make a few rotations with the handwheel, and again, put the needle in its lowest position and rise the bottom line to where the top line was. Inspect the two lines on the feed shaft and the hook behind the needle.

If these did not stay in adjustment, re-do the entire process, but be more careful not to move the handwheel when making the tightening adjustment. If you re-do this and it still does not stay in adjustment, you need to replace your timing belt,

Jan 01, 2009 | Sewing Machines

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