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Posted

Hi I haven't used my cylinder arm machine much to sew anything other than chrome apparel leather. But just yesterday I was sewing some veg tanned leather while putting together a bible cover. While sewing the two layers together, the rounded edges gave me problems.... specifically the stitches from the bobbin side tends to want to 'walk' off the edge of the leather (just barely stuck into the edge) while the top stitch is right where I'm trying to put it - which is about 1/8" from the edge. I was using a #18 leather needle with #92 nylon thread. Maybe the needle is too small for the thicker leather and causing deflection possibly? I'm using a spring loaded 1/8" compensation foot to help maintain my distance from the edge (letting the spring loaded part just hang off the edge of the leather) and going fairly slowly, especially around the edges. Also, I used HD double side tape to hold the two pieces together before starting the stitch run. Any tips for eliminating the bobbin stitch's wandering ways? Thanks.

Doug C

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Posted

Same sort of thing happened to me. Have to keep the object you are sewing flat, perpendicular to the needle. If you lift the left edge, stitching on the back moves closer to the edge. I built a flat table adapter, problem gone.

Tom

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Posted

I should have known. Yea supporting the piece is always a bit of a headache with the cylinder arm machine, unless it's a tubular item. I've thought about making an adapter but kept thinking I'd get myself another flat bed machine soon. I guess I need to break down and make the extension though. Any tips on making one, what did your construction consist of, laminated top and edges?

Doug C

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Posted

As mentioned above.. It took me awhile to keep the work flat on our 441 machines..It will fool you.

Quality leather goods www.captain-itch.com www.Tennesseeholstercompany.com

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Posted

Thanks for the picture Tom, that really does help. I think I can make one now.

Does Anyone Know Where the Love of God Goes When the Waves Turn Minutes to Hours?

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Posted

Would be using a 20g needle with #92 for a start

If the machine uses a 794 needle then it is a long thin needle for the job.22g or lower I would be using a machine with 135X16 needle.

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Posted

This problem can also be caused by the feed dog not being high enough when the needle begins to penetrate the leather, allowing the leather to be pushed down by the upper foot , thus bending the edge of the leather down. It can also be caused by too large of a hole in the feed dog, allowing the leather to be pushed down into the slot in the feed dog. The slots in the feed dog can get worn to the point that it is too wide to support the edge of the leather. Check to see if the feed dog is pushing up on your work just as the needle/upper foot start to push down. Both feet and the needle should touch the leather at the same time, holding the work even and flat. Gump

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Posted
  On 9/17/2014 at 1:50 PM, Gump said:

.. It can also be caused by too large of a hole in the feed dog, allowing the leather to be pushed down into the slot in the feed dog. The slots in the feed dog can get worn to the point that it is too wide to support the edge of the leather. .. Gump

This might be a "BINGO !" moment... the feed dog on this machine looks worn the heck out for sure. I will switch it out, been meaning to address that at some point just for aesthetics if nothing else - thanks for the heads up Gump.

The machine is a Consew 287R and uses 135x16 needles.. but I'll install a #20 needle too, thanks Darren.

Doug C

Does Anyone Know Where the Love of God Goes When the Waves Turn Minutes to Hours?

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