This video shows how to ‘thread’ a Carpet Serger Sewing Machine’ (Japanese model Yamato DCY108, medium duty, three threads).
Most of these ‘overlock sewing machines’ are similar and intended to overcast raw edges of carpets to avoid fraying.Besides, they do a nice decorative binding.
To have a better view of ‘threading process’ I have detached two pieces of the machine as we can see at the beginning of the video.
In normal conditions it is not necessary to do it.
In fact, these machines use three mechanisms to do the sewing: a single ‘needle bar’ on top, same as a regular sewing machine where a ‘thin thread’passes through its ‘needle eye’ and continues its movement down through. Two ‘loopers’ that work underneath, one works with another ‘thin thread’, and the other one holds a thick ‘woolen thread’.
I particularly would consider this machine of great help and it should be in an upholstery shop.
I hope you enjoy the video and find it useful to improve your jobs!
A Carpet Dashboard Cover:
Tips To Cut ‘ Automotive Trim Carpets’