Or just a good excuse for yet another tarp thread? Well, I recently finished a tarp and found a way to eliminate wavy stiches altogether, although I 'm sure not everyone will find it practical. I realised that by just advancing the machine manually, the stitches came out perfect. OK, it's a bit time consuming, but it's only when you sew silnylon, and I appreciate that many will be able to sew perfectly well at speed. However, if your new to myog and your having real problems balancing the stitch, it's there as a last resort. At least you get something that really looks good when it's finished. I think that when you're new to myog those first few projects are really important. A nice looking tarp is a big boost to morale and thus an encouragement to the beginner to continue in this highly rewarding hobby. The thread tension is not so critical when you advance the machine manually. Here are the results, purely for demonstration purposes of course:
Here's the ridgeline
and a tie out
I like to sandwich the sil nylon in the middle of the tieout: it's a technique used in parachute manufacturing to eliminate any possibility of a peel tear. It's a bit tricky and a pin helps, but the result is a bomber tieout.
I was in my local sewing shop last week, and saw a modern electronic machine with a DC motor. It was able to sew at very low speed (about one stitch per second. Now I'm not saying go out and get a modern electronic machine. However, I wonder if any bpl members have a machine with a dc motor, some of the ladies perhaps? Has anyone tried sewing silnylon using a very slow speed setting? Could speed be a major factor in how silnylon sews? Of course, even if they sew silnylon well, they would probably be unsuitable for other kinds of heavy duty sewing. On the other hand, I know many members have more than one machine, and use different machines for different kinds of sewing. Also, many people have someone in the family with an electronic machine. Personally, having gained experience the hard way, I would want to borrow any prospective purchase for a week or two and see how it sews a whole tarp (not always possible of course). I often find that sewing scraps does not always provide a clear picture of how the whole project will sew, because different sides of the fabric have different amounts of coating, and hence, different degrees of slipperyness. I'm afraid I don't know that much about sewing machines. I only raise the issue of DC motors for further investigation and comment by those with many years more experience than myself.