Index
	1	what is coverstitch sewing machine. Samples shawcases.
	2	where is coverstith sewing applied.
	3	coverstitch sewing machine components, motor, table and legs.
	4	coverstitch features, basic machine and automatic machine
	5	how to chose coverstitch needles. Ball point, regular point and sizes.
	6	how to put on needle, directions and needle brands, quality check.
	7	what will happen if needles bent, size not right, needle dull, or installed wrong
	8	how to put threads on to coverstitch sewing machines,
	9	common mistakes on threading.
	10	how to sew coverstitch with 3 needles, top and bottom coverstitches, starting, ending and locking.
	11	how to sew coverstitch with 3 needles, without top coverstitch, starting, ending and locking
	12	how to sew coverstitch with 2 needle wide gauge, with or without top coverstitch
	13	how to sew coverstitch with 2 needle narrow gauge, with or without top coverstitch
	14	how to sew single needle chain stitch sewing lines
	15	how to sewing stretching fabric
	16	how to sew with a straching wavy decoration stitches.
	17	how to sew with a gathering pleating decoration stitches.
	18	how to sew plain stitches on different stretching fabrics, adjusting stitch lengh to compensate
	19	know-how of different attachement, seam guide, folder, presser foot adjustable guide
	20	know-how of silicone oil and quality threads.
	21	know-how of available adjustment by user's level
		thread tension adjustment,
		needle thread take-up adjustment
		spreader thread take-up adjustment
		presser foot pressure adjustment
		stitch length adjustment
		different feed ratio adjustment.
	22	know-how of available setup by certified technician.
		needle bar height reset
		presser foot position reset
		spreader position reset.
		looper  position reset
		take up cam position reset
		other engineering reset.
	22	General maintenance
		cleaning and general checking on sewing head, motor, belt and sound.
		change filter, drain off oil and refill.
		tune up service by contact certified technician.
	23	general trouble shooting
		bottom coverstitching fails
		top coverstitching fails
		fabric is stretched with uneven wave
		fabric is gathered too much.
		stitch is not even, some area is loose, some tight
		fabric hole is too big
		fabric yarn is broken frayed out
		stitch is unraveled after usage or laundry cleaning
		machine is leaking oil
		sewing motor is failed
		machine is ceasing up, do not turn.
		machine turn in wrong direction.
		machine runs for a few turn, then slow down and stop.
	24	other options
		sewing light, long arm, LED
		seam cutter, ripper and scissor