Gamekeeper Report post Posted February 20, 2013 Hi folks, I have a Juki dsc 245 walking foot machine, using 19,21 & 23 needles but its constantly happening, especially when I turn the power on. It's less of an occurrence when turning by hand. So far I've checked the timing, adjusted needle height but I have noticed that on the larger needles #23 the hook is catching the needle & deflecting it slightly, I can't get the hook to move back any further as its close to the case. Any suggestions? Been fighting with this most of the day now!! Dave Quote Share this post Link to post Share on other sites
TwinOaks Report post Posted February 21, 2013 Sounds like there's a spacer in there that needs to come out.....however....i'm far from the expert on your machine, so I'll defer to them. Give them a little while to get here, and i'm sure we can help you figure it out. Quote Share this post Link to post Share on other sites
Northmount Report post Posted February 21, 2013 Is the needle in correctly? The scarf in the end should line up with the hook. Tom Quote Share this post Link to post Share on other sites
Gamekeeper Report post Posted February 21, 2013 Ok, Here's where we're at now (after 2 days on the damn thing!). Needles in ok. I've had hook/ bobbin carrier timed/retimed, on & off more times than I care to remember. After picking up bottom thread & getting ready to start sewing, the first couple of stitches go ok (occasionally drop 2nd) then it seems to go tight & you can hear top thread catching spool. As the top thread passes over the face of the bobbin carrier it's almost as if the 2 parts of the upper thread cross over each other when tight & cause each other to snap. Anyone know any reason that would cause this? I've also tried different thread & a range of different needles. Many thanks Dave Quote Share this post Link to post Share on other sites
Northmount Report post Posted February 22, 2013 Ok, Here's where we're at now (after 2 days on the damn thing!). Needles in ok. I've had hook/ bobbin carrier timed/retimed, on & off more times than I care to remember. After picking up bottom thread & getting ready to start sewing, the first couple of stitches go ok (occasionally drop 2nd) then it seems to go tight & you can hear top thread catching spool. As the top thread passes over the face of the bobbin carrier it's almost as if the 2 parts of the upper thread cross over each other when tight & cause each other to snap. Anyone know any reason that would cause this? I've also tried different thread & a range of different needles. Many thanks Dave Prior to this problem starting, have you had the plate around the feed dogs off? I don't have the same machine, but had what sounds like a similar problem. When I put the plate back on, the bobbin carrier was not in the right position. A tab is supposed to be trapped and held by the plate. When it was in the wrong position, it would sew but would break the top thread. As the thread came across the bobbin, it would get tight, could hardly turn the machine over. Hope you figure it out soon. Can be very frustrating! Tom Quote Share this post Link to post Share on other sites
Gamekeeper Report post Posted February 24, 2013 Here's a quick update for you folks, Stripped the hook & needle plate down, found "the spacer" - actually a bunch of fine thread! Reassembled - still no joy. Took it apart again, had to file down the bobbin carrier locating post & smoothed off every rough/sharp edge I could find. Reassembled - still no luck! Took it apart again, this time also the tensioner - smoothed, cleaned every bit. Reassembled - getting angry now, no luck! Thought, it's a long shot, I'll try a different thread. Changed to invincible thread & it worked!! So, it appears that thicker, stronger threads work well, the thinner, softer Venus type thread is now in the bin! Strange thing is - I bought the machine from a tailor who was using standard clothing thread & it was performing well, just not for me!! Downside is - I've spent 4 days not making anything & now I still have to wait as I only have white thread available. Anyone know the gauges/ equivalents to invincible thread? It's about 0.9mm wide, roughly. Many thanks Dave Quote Share this post Link to post Share on other sites
Wizcrafts Report post Posted February 24, 2013 (edited) The Juki DSC-245 series is a light duty, cylinder arm, walking foot machine. The specifications state that it is best used with no larger than #69 (T70) bonded thread, or 40/3 cotton or polyester thread. I don't know about Invincible brand thread, but I do suspect that your machine will not sew with 0.9 mm thick thread. You'll be lucky if it handles 1/3 that diameter (see thread/needle chart). Edited February 24, 2013 by Wizcrafts Quote Share this post Link to post Share on other sites
Trox Report post Posted February 28, 2013 Hi Dave, Did we not speak of this before? I told you your machine could not handle more than tkt 40 (tex 69). It might sometimes be possible to adjust machines to use a number heavier thread that the producers state as max. However, 0.9 mm thick thread, that must be tex 415 or more??. Its a bit optimistic to be mild, and of course not possible. Something good came out of it if you found some thread wrapped around the hook. Otherwise you would waste your time trying to find any spacers or get it to take any heavier threads. Producers have to be on their safe side when they state the machines limitations. Nevertheless, you need some place for all that heavy threads too. I am sorry, you do not only need more space; you need a different kind of machine construction to handle that thread size too. Tor Quote Share this post Link to post Share on other sites
Gamekeeper Report post Posted March 1, 2013 Ok folks, just to clarify. The easiest way i could find to "measure" the thread was to lay it across a ruler. I did state WIDE & not diameter. The machine is running fine with this thread, especially after I got a new feed dog & plate. Unfortunately, as previously stated in other posts, trying to find a good leather machine that will handle strong thread here in the UK is a nightmare. Mostly they are all in the states or have been bought up by places such as India. If anyone has one to sell in the UK & not wanting silly money then please let me know. Dave P.S. apologies to both Wizcrafts & Trox if it sounds like I'm ungrateful - I'm not. Quote Share this post Link to post Share on other sites
Northmount Report post Posted March 1, 2013 I would take width of a circle as being the same as the diameter. Unless you squashed it down flat first. Communication is one of the hardest things to do ... we each understand something from our own viewpoint, which is often different than what the teller is trying to portray. My son-in-law often starts off with the end of the story, then it takes 10 questions to get him to back up and start from the beginning. My daughter complains, just start at the beginning like we do! Many questions asked here on LW do the same. They start at the end, or miss the technical information that is needed for others to troubleshoot and provide help. So for all those posing questions, give some of the technical detail about how you got there, what you used and what order. This is just a comment, no disrespect to anyone, Dave included. Tom Quote Share this post Link to post Share on other sites
dirtclod Report post Posted March 1, 2013 (edited) I'm not much on metric does 10 mm = 1 cm ? If it dose that's some big thread more like small rope ! After going back and rereading everthing again i saw i missed the .09 mm. Though for sure it was 9mm. Edited March 1, 2013 by dirtclod Quote Share this post Link to post Share on other sites
Trox Report post Posted March 4, 2013 OK, even 0.9 mm is a very thick thread. Thread sizes are confusing enough as it is, please read the size of the ones you got. If you found some old thread without any label, just trow it away it is no good. You need fresh left twisted sewing machine thread of the right size to right size needle. If you do not know the size of it, how do you size your needles. If you are not following any of these steps the result is what you have. There are ways to do it without knowing. However, I do not think you know how. Metric sizes is TKT and imperial is TEX. In the machine manual it says max TKT 40/3 (three ply) TEX 69, if I am not wrong. It also state the needle size. Your machine is not built for more (you cannot move the hook further away from the needle). I keep my threads packed in plastic, if it gets old and dry it is no good. (You may use some Fibings liquid glycerin saddle soap on it to lube it again. Nevertheless, its fresh-ware keep it in plastic). Your Juki is a good machine, it is not for heavy threads. About sewing machine prices; Heavy thread triple feeds machines is expensive all over the world. When regular machines prices and lighter duty rating triple feeds will have different prices, the first mention heavy machines are always expensive. Tor Quote Share this post Link to post Share on other sites
Wizcrafts Report post Posted March 4, 2013 I'm not much on metric does 10 mm = 1 cm ? If it dose that's some big thread more like small rope ! After going back and rereading everthing again i saw i missed the .09 mm. Though for sure it was 9mm. He asked about .9mm, not .09 or 9. This is just shy of 1mm and is about the size of #415 bonded thread. Only the heaviest stitchers can handle such thread. It requires a #27 or #28 needle. Quote Share this post Link to post Share on other sites
Trox Report post Posted March 4, 2013 Thanks Wiz, you see what I mean. Tor Quote Share this post Link to post Share on other sites
