Blind Hem Stitch
Automatic back pocket Blind Hem Stitch machine is applicable for jeans pant and other types of fabrics. The blind hemmer machine can process 8000 pockets per 10 hours. The efficiency of this machine is increased by twice compared with the traditional procedure. Differential feeding amount should be adjusted depending on kind of fabric elasticity. When hemming operation, especially on stepped parts, increasing amount than plain sewing will be sewn on stepped part better. Also beautiful finish can be obtained.
Blind Hem Manufacturing Requirements:
- Must be even in width
- Must be flat without twisting/ pleats
- Must not have visible blind stitches on the product’s face side, if no other instruction has been given
- Must stitching must overlap 2,5 cm to not unravel after wash
Specifications of Euromac Automatic Back Pocket Hemming Machine:
|Specifications Name||Specifications Value|
|Machine Category||Sewing Machine|
|Product Name||Euromac Automatic Back Pocket Hemming Machine|
|Product Model||Sewing process|
|Origin||Made in China|
|Agent in Bangladesh||No/Yes|
|Production Capacity||8000 pockets per 10 hours|
|Optional needle gauge||1/16′ ‘ (7.9mm),3/8’ ‘ (9.6mm),1/2’ ’ (12.7mm)|
|Presser foot lifting height||10mm|
|Machine size||1062 x 1000 x 1240mm (L x w x H)|
|Description||The efficiency is increased by twice compared with the traditional procedure|
Blind Hem Guideline:
Before adjusting blind hem ALWAYS turn the motor switch OFF and check that the motor has already stopped.
- Set the left end of the slide edge guide 1. 5 mm inside that of the blind-hemming edge guide(1). Loosen the nut (3) and turn the adjusting screw (4) to adjust it.
- Set the blind-hemming guide (2)2. 7 mm inside the left end of the blind-hemming edge guide(1). Loosen the screw(5) to adjust it.
- Make the standard clearance between the sensor(6) and the right end of the blind-hemming guide(2) to 0. 8 mm.
- Loosen the screw(7) to adjust it.
- Adjust the clearance depending on the thickness of fabric or stepped size.
- Increase the clearance when sewing heavy weight
- Make the standard height of the blind-hemming edge guide from the top of the stitch plate to the bottom of the guide to 0. 1 mm. Too high position of it cannot detect the stepped part.
- Loosen the screws(8)(9) and move CH device up or down to adjust it. After that, check the slide edge guide moves smoothly.
Blind Hem Sensitivity on Stepped Part:
Turn the sensitivity adjusting knob(1) to adjust the sensitivity depending on thickness of fabric.
When sewing heavy weight fabric, always the sensor detects and operate the slide edge guide, turn the knob to the left or to low number. When sewing light weight fabric, the sensor is difficult to detect the stepped part, turn the knob to the right or to high number. If the above adjusting fails to detect, make the clearance between the blind-hemming guide and the sensor to 0. 5 – 0. 7 mm. Note: Do not keep the detection lamp(2) turning on.
Blind Hem Stitch Depth on Stepped Part:
Adjust the stitch depth on the stepped part by operating amount of the slide edge guide. Standard amount is 2 mm. Loosen the nut(3) and turn the adjusting screw(4) to adjust it. To decrease the operating amount and make the stitch shallow, turn the adjusting screw(4) to the right.
To increase the operating amount and make the stitch deep, turn the adjusting screw(4)to the left.
After adjusting, lock the adjusting screw(4) with the nut(3)
Stitch Number on Stepped Part of Joint Seam:
The operation count(front) (1) has been adjusted to “2” and operation count the (rear)(2) to “6” at shipment. When the sensor detects the stepped part, the slide edge guide moves to the right after two stitches. When the sensor finishes to detect the stepped part, it returns after six stitches.
Adjust the stitch number depending on the stitch length.
When much appeared stitches are many on a fabric before the stepped part, increase the number of the operation count (front)(1). If stitch depth is too shallow or off-stitch occurs, decrease the number.
When much appeared stitches are many on a fabric after the stepped part, decrease the number of the operation count (rear)(2). If stitch depth is too shallow or off-stitch occurs, increase the number.
Rotary Solenoid (large) and Blind Hem Guide:
The blind hemming guide can be put down until it is horizontally. Check it is tilted up enough when using.
Loosen the screw(1) and keep the guide tilted up. Turn the shaft(2) of the rotary solenoid (large) clockwise (seen from the shaft side) fully and fix it with the screw(1). And fix the hemming guide interlocking lever(3).
Blind Hem Rotation Detector Unit:
Do not put your foot on the pedal not to run a machine. Adjust the rotation detector unit so that the clock lamp(4) turns on when the needle tip is raised to the top of the stitch plate. Loosen the screw when the needle type is up to the top of the stitch plate. Align the magnet(5) of the oil cooling fan magnet unit with the rotation detector unit.
Blind Hem Foot:
Adjust the blind hem foot switch so that the presser foot lamp(1) turns on when the presser blind hem foot is raised though it turns off usually.
Make the clearance between the rotation detector unit(2) and the magnet(3) to 1.0 mm. Loosen the screw(5) and adjust the position of the magnet basement to move the switch plate(4) smoothly. Loosen the screw(6) and adjust the position of the switch plate(4) to move the presser blind hem foot lifter lever smoothly.
Detection of Stepped Part of Blind Hemmer:
When the sensor of blind hemmer is stayed, the detection lamp(1) turns on at the graduation “10” of the sensitivity adjusting knob (2) and turns off at “7” . Thees are correct positions of the side seam detector unit and the magnet. Turn the sensitivity adjusting knob(2) to “l” -“3” and push the sensor fully. The detection lamp (1) turns on.
Loosen the screw(3) and turn the adjusting screw(4) to adjust up-and down position. To raise the side seam detector unit of blind hemmer and turn it clockwise. To lower the side seam detector unit, turn it counterclockwise.
Loosen the screw(5) and turn the adjusting screw(6) to adjust right-and-left position. To move the side seam detector unit to the left, turn it clokwise. To move the side seam detector unit to the right, turn it counterclockwise.
Note: If the detection lamp turns on when the sensor is pushed fully on the graduation “0” , adjust the variable resistor(7) in the control box as follows. Set the sensitivity adjusting knob to “1” and “2”. Turn the variable resistor(7) of blind hemmer to the right until the detection lamp turns off while pushing the sensor fully.
Md Mustak Ahmed, Author, B.Sc in Textile Engineering, www.textilestudent.com