JukiFan

Did you get your knee lifter working?

I have seen many varying videos online and there's no consensus. Does the thread go over the pin or not? I typically do not have it over the pin, but it is in this photo.

Tension seems about the same as a PEZ dispenser which should be fine. I have never adjusted it. The location of the spring seems like its at about a 9 position in reference to a clock. A lot online seem to be more at at 9:30 position or higher. Should I reposition it?

Update...Okay, I ordered Amann TEX 90 Outdoor Pro Polyester Bonded thread and pre-wound bobbins from Wawak. Also, I ordered Schmetz Leather Needles: 135x16x20, 135x16x21, & 135x16x22. I threaded the machine and tried out all the needle sizes. The result was frayed polyester thread on top near the last thread guide and the needle. The poly snapped several times as well. Tension could have been too tight...or it could have been a burr...or a combination of them both??? Played with different tensions for about 2.5 hours. Never could get it right. Became super frustrated, put back on the 69# Nylon and tested with various needles (the leather needles as well as my existing 135x17 in size 18, 20, & 22). Eventually, the 135x17x18 worked best. It might be working better than before. The topstitching isn't skipping stitches like before. So, any idea on why my machine hates Poly?

Thanks everyone for your taking your time for suggestions & insight!!! I am going to order some different needles and thread. If the skipped stitches continue, I will do the suggested adjustments. I am snowed in for the next couple of days. Please consider this thread PAUSED for the next week until needles and thread arrive and adjustments are made!!!

No is good! So, I have placed an order for the 135x16x18 needles from Amazon (for convenience). What weight of bonded polyester thread? Where would you purchase?

So, the Juki has been in my possession for 10 years. I have used it probably 40 hours in making covers for gym equipment. Normally, I would use the 69# Nylon with a 135x17x18 needle. It never skipped stitches with my previous material which was thinner. With the newer 1/16" material, it happens. I switched to a 20 size needle before I came onto this forum. It could be that I am not pulling both sides of the seam tight enough before trying to apply the top stitch??? Like I mentioned before, the shop who sold me the vinyl told me that another upholstery professional told them the material was impossible to top stitch. I asked for more info and they had little to say. My O.C.D. tells me that I am missing an adjustment or something. So, if I switched to the 135x16x18 needle, would I need to adjust the timing? Vinyl is the only material that I will ever sew with this machine.

Sorry for the delayed response... My needle is a brand new 135x17 size 20 69# Nylon thread for bobbin and top Material is 1/16" thick. So, 3/16 for the two pieces and a top stitch. The first two photos are of five pieces of material sewn at once 5/16" with no skipped stitches. Top and bottom The third and fourth photo is of a top stitch with only missing once. Top and bottom The fifth photo is of an example of tons of missed stitches with the same setup.

I have had a Juki LU-562 for over 10 years that never skips stitches when top stitching vinyl material. However, I started sewing a thicker version of vinyl like what would be used to reupholster a John Deere tractor seat. The supplier who sold the vinyl to me said that another upholstery shop said the material was impossible to top stitch without skipping stitches. So, what would you tell me to adjust on my machine other than replacing the needle? I like the material and would like to finish using it as I bought three rolls due to the price. Basically, I have no formal training on my machine or how to adjust it. I have tried to review all the Youtube videos on the Juki LU-562/563. Thanks in advance!!!