toad92

See picture. I can probably raise it another 1/4" - 3/8". Where would I adjust the outer foot height? Yep, the looping mostly occurs while the feet are mounting and dismounting the hump. I also get looping when I edge stitch around the corner of a facing on my DDL (haven't tried yet with my 1181N) unless I temporarily decrease the stitch length. Thanks for the suggestion; I'll give it a try and report back. Anecdotally I've tried adjusting the check spring position on my DDL machine but it didn't seem to make a difference. How would I adjust the timing of the inside foot?

Not strictly an issue pertaining to leather, but I figured this would be the best place to ask. I just finished setting up my DU-1181N last night and ran a few stress tests to calibrate the tension, foot pressure, etc. I intend(ed) the use the machine primarily for topstitching on woven fabrics, mostly with Tex 100 polyester thread. I realize now that a top and bottom feed machine is probably not an ideal solution for topstitching items with frequent changes in layers like folds and seams, particularly seams on hems. With the stock configuration the machine was having great difficulty mounting and dismounting large seams/folds, so I adjusted the middle foot height and it managed to (mostly) remedy the issue. However, despite playing with the tension for almost an hour I can't seem to prevent the machine from creating loops under the fabric (losing tension? Needle deflection?) on the more substantial differences in layers. This persists even with a shim/hump jumper to keep the foot level. I've had the same issue with my Juki DDL drop feed machine, which only seemed to be mitigated by cranking my bobbin tension (and thus enabling me to crank the upper tension), reducing my stitch length and switching from a TEX 75-80 thread to a TEX 60. Thus I sought to acquire a machine that could accommodate a larger needle so I could use a thicker thread for more pronounced topstitching. Acknowledging I probably should have gone with another drop feed machine like the DDL-8700H (or possibly a DLN?), is there anything that I can adjust to mitigate this looping?