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spotty

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Posts posted by spotty

  1. Posted · Report reply

    So I have been playing around and I think I have the hook timing close - ie. the hook rotates around intersects with the needle scarf and picks up the top thread.    I was then running into problems in that it wasn't rocking up the bottom thread - so I ended up playing around and got the gap just right that it picks up the bottom thread now with the cover plate off or on.  So I thought I'd figured it out and then put the presser foot on and hand turned it and the top thread then looks like it isn't forming the stitch.

    Threading path in attached image/

     

    Video of Throat plate on no presser foot picking up bottom thread  

    Video of presser foot on not coming stitch

    So looking at the timing its close, the hook needle gap is close but still not getting stitch when presser foot on and material under the foot.

    Frustrations galore.  Looking for ideas on what to try next

    IMG_3392.JPG

  3. Posted · Report reply

    So I'm getting very frustrated by this machine,   It was completely flakey when it came to doing zigzag and I figured the timing was off a bit so I decided to re-time it to see if that helps.  Now I'm in a situation where the hook picks up the top thread reliably with the throat plate off I can watch it picking up the top thread but I put the throat plate on and try to sew and get nothing.   Take the plate off and try again and can see the hook is picking up correctly,

    I reverified the needle bar position, hook time intercept (on center ie straight stitch) and the position of the needle relative to the hook.   All seem correct.

    Any ideas on whats going on or things to try,   I have a video, but is way too big with the max size of 1.46Mb but am pleased to post a link to a file share for those that think they may be able to help.

  4. Posted · Report reply

    Definately not threading in that part of the bobbin case.       After much further tweaking it now appears to be adequately zig zagging.      I can adjust the width and length and the tensions look reasonably consistent.

    I'll continue to continue to tweak but it looks acceptable for the most part.   I did nothing different except for clean every part with compressed air and wipe clean the tension disks.

     

  5. Posted · Report reply

    Cleaning up the entire thread path and cleaning between the tension disks did help - although its still not perfect its much better.   The check spring still seems quite stiff in comparison to my consew 290 machine.   So I'm not sure if there is much adjustment that can be done with regard to the checkspring or if that would make much of a difference.   I'm going to sew a whole load more material to determine how consistent the machine is - by only adjusting stitch width and length and seeing how consistent the stitches are.

     

  6. Posted · Report reply

    4 hours ago, Wizcrafts said:

    Either the top tension is tightening or the bobbin tension is loosening as you zig-zag. I also see white knots beginning to show on the straight stitches, going towards the zig-zags. Check the following to see if any apply to your situation.

    • Is the top thread overly bonded and coming off the spool with different tensions as it unwinds? If so, try a different spool.
    • Is the thread feeding straight up to a thread guide on the thread stand?
    • Does the thread twist over itself, or over posts/guides along the path to the tension disks? Twisty thread causes all manner of trouble.
    • Remove the top tension disks and clean out any foreign material.
    • If the tension disks have thread gouges, replace them.
    • Make sure you are feeding the top thread around the check spring and it has a good range of motion up and down.
    • If the top thread path is unrestricted, move on down to the bobbin thread and pull out a few feet of thread. Does the tension vary?
    • If the bobbin thread tension varies, it could be because of a fragment under the bobbin tension spring. Check under the bobbin spring.
    • If the bobbin spring isn't blocked, examine the bobbin to see if it is out of round as it turns. If so, replace it.
    • Also check for protruding thread stubs coming out of the bobbin.
    2

    Thread is good - occurs on whatever E-Thread I run through the machine.

    Thread is feeding straight through the guides on thread stand.

    Thread seems to run fairly straight.

    (If I use the thread in the Consew 206 it works with zero problems and the problem occurs on different spools and bobbins)

    No material in tension disks - but removed and cleaned anyway.

    No gouges in tension disk.  

    It does go correctly around check spring but not really much movement in spring when sewing.   But spring does seem to be fairly stiff (Probably more so than on the 290 machine)

    Tension on bottom thread (bobbin) seems pretty consistent.   I'll check under the bobbin spring.  No protruding threads from the bobbbin.

    I can try another bobbin to see if that makes makes difference.    

    I will try a few more things tommorrow.

     

     

     

     

  7. Posted · Report reply

    The following shows some examples.   I'd retimed the machine and then started with some straight stitching.   From left to right I would increase the tension a bit.   Using contrasting threads - red on the top, white on the bobbin.   Bottom stitching never looks particularly straight - till I got something that looks OK. (its not dropping stitches).   Then without adjusting tension I start doing some zig zags.   Now with all the zigzag I never adjust the tension further I'm simply adjusting the stitch length and width and  then I'm seeing somewhat of the opposite to what I was seeing before - ie.   the top side starts looking wonky but the bottom side looks reasonable.   I checked the thread path was correct.   

     

     

    Webp.net-resizeimage (1).jpg

    Webp.net-resizeimage.jpg

  8. Posted · Report reply

    The following shows some examples.   I'd retimed the machine and then started with some straight stitching.   From left to right I would increase the tension a bit.   Using contrasting threads - red on the top, white on the bobbin.   Bottom stitching never looks particularly straight - till I got something that looks OK. (its not dropping stitches).   Then without adjusting tension I start doing some zig zags.   Now with all the zigzag I never adjust the tension further I'm simply adjusting the stitch length and width and then I'm seeing somewhat of the opposite to what I was seeing before - ie.   the top side starts looking wonky but the bottom side looks reasonable.   I checked the thread path was correct.   

    Pics

    https://1drv.ms/i/s!AtNFQZ6-n-pbkp0Di6bm-zJN5qXkvg

    https://1drv.ms/i/s!AtNFQZ6-n-pbkp0EDrSg98ErX35mSw

    This machine is just frustrating getting it to sew consistently.   More so than the other machines I use.

  9. Posted · Report reply

    i have a consew 199 and am having tremendous problems getting the machine to work reliably.    When sewing zigzag the top side looks ok but the underside looks like crap.    I've tried adjusting the tensions on the top and bottom bobbin numerous times and it may work for a short time and then start looking like crap again while sewing the same materials.    

    I've checked the thread path is correct and clean and re-timed the hook, but it just seems to drift and I'm rather frustrated as to what to and where to start looking to get this machine working reliably.

    Any suggestions for a plan of action.

  13. Posted · Report reply

    All my experience just means I'm old. I'd love to have Wiz in the factory, much like my file cabinets full of machine manuals. I could pick his brain like the resource he is. Like me, his knowledge has come through practical life experience, and I'm sure like myself, plenty of missteps along the way. Industrial machines are not something you just figure out in a weekend on a forum. I try to present information as simply as I can, and hope I don't lead someone astray in the process. I applaud the efforts of everyone who contributes here.

    Regards, Eric

    I appreciate all the advice - and this is a great resource for people who have a lot more experience on industrial sewing machines than me.

  14. Posted · Report reply

    I do believe that this item may require an industrial sewing machine dealer to install it safely. The "needlebar rock-frame" may need to be cut away to accommodate this extra wide needle clamp (according to one eBay item I just read about).

    I too read those instructions but have now been told by someone who installed the clamp in the 112w140 - that you simply need to shorten the needle bar. No modification to the rock frame was required. If that was the case I would be much more hesitant as the difference in cost on parts is 15 bucks for needle bar vs 115 bucks for a rock frame.

    As far as I can tell there are two needle bars that can be used on a 112w140 which have different part numbers. The original had a push in clamp which was secured with a set screw. The needle bar part I'm told now that is needed is Singer PN 267267 which is threaded on one end. And the total length with the clamp needs to be cut down to 17cm in length. The timing marks on the needle bar are useless because of the increased height of the clamp but it will work just fine at that length.

    Thanks for thoughts...

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