Members JeannieH Posted October 23, 2019 Members Report Posted October 23, 2019 Hi everyone. So I got on my machine today and the stitches aren’t forming right. First, the top thread wasn’t pulling the bottom thread up because underneath the leather it was straight. I switched thread and needles and same issue. I thought my bobbin wasn’t winding right enough so I worked on that and that still didn’t solve the problem. Other than timing, what could be the issue? It’s a new consew 227r. I can’t remember anything drastic happening to throw the timing off. I did the other day, sew through two pieces I had glued together with aquilim glue..and my stitches weren’t all forming consecutively. I hate having to retime the machines so before I take it apart, I wanted to see what else I could try first. Thanks ahead! i have probably only sewn on this machine a total of 2 hours! Quote
Members Constabulary Posted October 23, 2019 Members Report Posted October 23, 2019 If the thread knots do not pull through the material increase the top tension and / or lower the bottom tension or try a larger size needle. What thread and needle size are you using? Leather tip or round tip needle? Quote ~ Keep "OLD CAST IRON" alive - it´s worth it ~ Machines in use: - Singer 111G156 - Singer 307G2 - Singer 29K71 - Singer 212G141 - Singer 45D91 - Singer 132K6 - Singer 108W20 - Singer 51WSV2 - Singer 143W2
Members arashikage Posted October 23, 2019 Members Report Posted October 23, 2019 If the bottom thread is straight the problem is top tension too loose or bobbin tension too high. Double check that the top tension is staying put after changing it. I had a machine that the threads were bad on the top tension knob and it would kick it self out. Quote
Members JeannieH Posted October 23, 2019 Author Members Report Posted October 23, 2019 (edited) Sorry I forgot to mention I adjusted the top tension and it makes no difference..cranked it up real high and real low... no huge difference. i tried different needles..size 18 and 21 round and a tricut size 22. Leather is chrome tanned glued together with leftover sliced leather from veg tan inside. I tried other leather and still same result. Thread is vinymo #5 on bobbin and top. What type needle is best for topstiching and which for inside seams? Edited October 23, 2019 by JeannieH Quote
Members JeannieH Posted October 23, 2019 Author Members Report Posted October 23, 2019 Ok the timing is fine. i changed both threads to serafil size 138 I believe. Needle is round. Sewed just fine. I replaced the top thread with vinymo #5...same serafil bobbin..this time, the top thread(I have two different colors so I can see what’s happening) can be seen at the bottom. next I put the vinymo in the top and bobbin and bottom stitch is straight with small loops from hw top thread. I cranked the tension up and the top thread still didn’t pull the bottom thread up! i have used vinymo a lot and even on this machine..can’t figure out what’s wrong. i also noticed when I wind the vinymo on my bobbin it doesn’t seem tight like my other threads...if I take it out the machine it unravels easily. I’m stumped! Quote
Members JeannieH Posted October 23, 2019 Author Members Report Posted October 23, 2019 Ok I used the same vinymo not thread but in the smaller #8 size in the top and bobbin...and it sewed fine. So the problem is with the bigger thread. So guys..why might this be happening? I know my machine can handle the thread..it’s a consew 227r2. Quote
Members JeannieH Posted October 23, 2019 Author Members Report Posted October 23, 2019 I used the bigger vinymo on top and the smaller size on the bottom and it seems to have solved the problem. Will try the strap again to know for sure. Quote
Members Hildebrand Posted October 23, 2019 Members Report Posted October 23, 2019 Check your needle size and make sure your needle is correct for the larger thread. Also when you change the top tension without affecting the stitches you may have too much bottom tension. I had that issue with my CB 4500 when it was new, I had a hard time balancing things and then by accident I found out there was something caught in the bobbin carrier and no matter what I was doing to the tension adjustments it wasn't changing. It popped free and life has been good since. Quote
Members JeannieH Posted October 23, 2019 Author Members Report Posted October 23, 2019 Ok thank you. I will check the bobbin tension. One other problem I’m having I gotta is that when sewing my chrome tanned purse strap...when finished it’s slightly curved and not straight. Any experience with that? Quote
Northmount Posted October 24, 2019 Report Posted October 24, 2019 @JeannieH Moved your post to Leather Sewing Machines. You'll find more help here. Also, see this needle and thread size chart https://www.tolindsewmach.com/thread-chart.html For straps, the higher the thread tensions, the more likely the strap may curve, and especially if you changed tensions between sides. The leather may also have a natural curve it wants to follow. Tom Quote
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