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Textile Industry Digital Electronic Yarn Count Length Tester for Lab Yarn Density Measurement Device / Instrument / Equipment
1.1 Product application
This product is used to reel sample yarn skeins onto a reel from bobbins at a selectable tension of reeling for the precise measurement of yarn length, which is required for the measurement of yarn linear density or yarn count as well as the test for skein strength in the textile industry.
This product is in conformity with the national standard GB4743 Textiles--Yarn from packages--Determination of linear density (mass per unit length) by the skein method.
1.2 Major specifications
1.2.1 Number of bobbins measurable simultaneously: 6 bobbins
1.2.2 Bobbin distance: 60 mm
1.2.3 Reel circumference: 1,000mm ±1mm
1.2.4 Reel speed: (30 ~ 250) r/min, infinite variable speed
1.2.5 Selectable number of turns in a skein: 2 ~ 9999 turns
1.2.6 Reciprocal traverse movement range for reeling: 35mm
1.2.7 Tension range by single yarn reeling: (0~100) cN
1.2.8 Power supply: voltage: 220 V, frequency: 50Hz
1.2.9 Overall dimensions (L x W x H): 780mm x 660mm x 480mm
1.2.10 Total weight of product: 55kg
2 Product Structure
2.1 Reel
The reel consists of 6 lobes, which enable the skein to get a hexagonal shape when the yarn is winded on the reel. One of the lobes is designed with a movable structure so that the skein can be taken down conveniently to avoid tension effect on the skein during doffing。
2.2 Tension of reeling
A tension regulator consisting of two open-type parallel tension regulating rods is used to regulate the tension of reeling through varying the wrapping angle of the yarn on the tension rod. And the tension is measured at the same time by a lever-type tension scale.
2.3 Drive system
The drive system is installed in a casing to prevent it from dust contamination and ensure its reliability during operation. The rotary movement of the reel and the reciprocal traverse movement for reeling are driven separately by two independent motors.
2.3.1 Reel drive
The reel is driven by an independent DC motor through a carrying shaft and a pair of belt pulleys. The rotational speed of the reel can be varied infinitely by the electric control. The reel can start smoothly and slow down by itself when entering into the last turn of a preset number of turns before it stops automatically at the preset number of turns. The reel can stop at a specified position properly and smoothly.
2.3.2 Reciprocal traverse movement for reeling
A cam is driven by an independent synchronous motor at a constant speed to push the traverse thread guide to make traverse movements reciprocally at a constant speed, so that the yarn is winded in a reciprocal traverse movement. The wide range of this reciprocal traverse movement makes it possible to reduce the number of overlapped layers in yarn winding.
2.4 Control device for the number of turns in a skein
The number of turns in a skein is preset by a manual dial on the computer. The number of turns that is being completed by the reel is picked up by a non-contact switch and converted into a signal, which is displayed in digital form on the counter as the number of turns realized by the reel. The precise counter ensures that the number of turns in a skein can be selected and controlled in a correct manner.
Schematic Layout of YG086C Measuring Reel | |||
1. Bobbin pin | 2. Thread guide | 3. Tension regulator | 4. Front panel |
5. Counter | 6. Tension scale | 7. Tension feeler rod | 8. Traverse thread guide |
9. Pointer | 10. Reel | 11. Handle | 12. Electric control |
3. Product Installation and Adjustment
3.1 The product should be placed on a firmly fixed working table (with a height of approximately 0.7m) in the laboratory for usage. It is permitted to insert under the bottom footing of the product so as to enable the pointer to align with the marking line on the front panel when the rider of the tension scale is at zero position.
3.2 The electrical part should be checked before switching on power to make sure there is not any damping or other negative phenomenon.
4 Product Startup and Operation
4.1 Preparations before startup
4.1.1 Check to make sure that the pointer is aligned with the marking line on the front panel when the tension scale is at zero position.
4.1.2 Switch on power and check the machine to make sure that it can operate normally under unloaded conditions.
4.1.3 Preset the tension of reeling on the tension scale according to a required tension for single yarn reeling. Move the rider on the tension scale to the required value position of reeling tension and tighten the knurled screw on the rider. The tension for single yarn reeling can be calculated according to the single yarn pre-tension values specified by the State, which is generally set at 0.5cN/tex of the sample yarn.
Table 1
Linear Density (tex) | 7-7.5 | 8-10 | 11-13 | 14-15 | 16-20 | 21-30 | 32-34 | 36-60 | 64-84 | 88-192 |
(English Count) | (90-71) | (70-56) | (55-44) | (43-37) | (28-19) | (28-19) | (18-17) | (16-10) | (9-7) | (6-3) |
Reeling Tension (cN) | 3.6 | 4.5 | 6 | 7.3 | 9 | 12.8 | 16.5 | 24 | 36 | 70 |
a. When skeins are reeled simultaneously from 6 bobbins, the value on tension scale 6 is equivalent to the tension for single yarn reeling. If the number of bobbins for simultaneous skein reeling is less than the standard number of this machine, the value on tension scale 6 can be calculated with equation (1) before skein reeling.
------------------------------------------ (1)
where, T --- the value on tension scale 6 after conversion based on the number of bobbins for simultaneous skein reeling.
f0--- the tension for single yarn reeling (i.e. single yarn pre-tension).
n --- the number of bobbins for simultaneous reeling.
b. The coefficient (μ) of dynamic friction between the yarn and tension feeler rod 7 on tension scale 6 varies with different types of yarns. If it is necessary to have a more precise control of reeling tension, the value on tension scale 6 can be calculated with equation (2) before skein reeling.
T (μ) = C·T ----------------------------------------------------(2)
Where, T (μ) --- the value on the tension scale calculated based on different μ values.
C --- the correction factor for μ.
μ --- the coefficient of dynamic friction between yarn and tension feeler rod (actually measured with other instruments).
The value C in equation (2) can be found in Table 2.
Table 2
μ | 0.25 | 0.3 | 0.35 | 0.4 | 0.45 | 0.50 |
C | 1.046 | 1 | 0.955 | 0.912 | 0.873 | 0.837 |
4.2 Operating procedures
4.2.1 Place bobbins on bobbin pin 1.
4.2.2 Thread yarn from the bobbins through thread guide 2 before going through tension regulator 3, tension feeler rod 7 and traverse thread guide 8. Then, clip yarn ends on to the gripper on reel 10 one by one.
4.2.3 Press the manual key on counter 5 at the position of the required number of turns in a skein.
4.2.4 Turn the speed regulating knob on electric control 12 toward the required indication position for a reel speed, which is generally set at 200 r/min approximately.
4.2.5 Switch on power and press the “START” button on electric control 12 (after zero clearing of the figure on the counter). The reel stops by itself when the number of turns in a skein preset on the counter is reached by the reel rotation.
a. Before winding skeins onto the reel, special attention should be paid to make sure that the rider on the tension scale is placed at the position of the required reeling tension, and pointer 9 on tension scale 6 points at the marking line on front panel 4, i. e. the tension scale is under a balanced condition during reeling. If it is not correct, the wrapping angle between the yarn and two open-type parallel tension rods on tension regulator 3 can be adjusted so that pointer 9 can point at a position near the marking line on front panel 4. It may also be possible to turn the speed regulating knob on electric control 12, i.e. changing the reel speed, for pointer 9 to point at the marking line on front panel 4. A slight swinging of pointer 9 is allowable during skein reeling.
b. When adjusting tension regulator 3, make sure that the yarn is winded onto the reel through traverse thread guide 8 by way of the bottom surface of tension feeler rod 7 after passing over the top surface of the thicker tension rod on tension regulator 3. The vertical position of traverse thread guide 8 should not be changed arbitrarily, or otherwise, the accuracy of tension scale 6 will be negatively affected.
4.2.6 Knot the head and tail ends of the yarn in each skein separately, keeping the joint length under 1cm.
4.2.7 Lower down one of the movable lobes of reel 10 inwardly. Then, take down each skein one by one before replacing the movable lobe of reel to its original position.
4.2.8 Reel the second batch of skeins by repeating the procedures above.
4.3 Switch off power after finishing operation.
4.4 Discard the skeins that were reeled when tension scale 6 was under imbalanced conditions during winding (i.e. the tension of reeling was not in conformity).
5 Product Maintenance
5.1 The circumference of reel 10 and the indication value of tension scale 6 are strictly calibrated before product delivery and should not be disassembled and changed arbitrarily.
5.2 The machine should be kept clean regularly.
Textile Industry Digital Electronic Yarn Count Length Tester for Lab Yarn Density Measurement Device / Instrument / Equipment
1.1 Product application
This product is used to reel sample yarn skeins onto a reel from bobbins at a selectable tension of reeling for the precise measurement of yarn length, which is required for the measurement of yarn linear density or yarn count as well as the test for skein strength in the textile industry.
This product is in conformity with the national standard GB4743 Textiles--Yarn from packages--Determination of linear density (mass per unit length) by the skein method.
1.2 Major specifications
1.2.1 Number of bobbins measurable simultaneously: 6 bobbins
1.2.2 Bobbin distance: 60 mm
1.2.3 Reel circumference: 1,000mm ±1mm
1.2.4 Reel speed: (30 ~ 250) r/min, infinite variable speed
1.2.5 Selectable number of turns in a skein: 2 ~ 9999 turns
1.2.6 Reciprocal traverse movement range for reeling: 35mm
1.2.7 Tension range by single yarn reeling: (0~100) cN
1.2.8 Power supply: voltage: 220 V, frequency: 50Hz
1.2.9 Overall dimensions (L x W x H): 780mm x 660mm x 480mm
1.2.10 Total weight of product: 55kg
2 Product Structure
2.1 Reel
The reel consists of 6 lobes, which enable the skein to get a hexagonal shape when the yarn is winded on the reel. One of the lobes is designed with a movable structure so that the skein can be taken down conveniently to avoid tension effect on the skein during doffing。
2.2 Tension of reeling
A tension regulator consisting of two open-type parallel tension regulating rods is used to regulate the tension of reeling through varying the wrapping angle of the yarn on the tension rod. And the tension is measured at the same time by a lever-type tension scale.
2.3 Drive system
The drive system is installed in a casing to prevent it from dust contamination and ensure its reliability during operation. The rotary movement of the reel and the reciprocal traverse movement for reeling are driven separately by two independent motors.
2.3.1 Reel drive
The reel is driven by an independent DC motor through a carrying shaft and a pair of belt pulleys. The rotational speed of the reel can be varied infinitely by the electric control. The reel can start smoothly and slow down by itself when entering into the last turn of a preset number of turns before it stops automatically at the preset number of turns. The reel can stop at a specified position properly and smoothly.
2.3.2 Reciprocal traverse movement for reeling
A cam is driven by an independent synchronous motor at a constant speed to push the traverse thread guide to make traverse movements reciprocally at a constant speed, so that the yarn is winded in a reciprocal traverse movement. The wide range of this reciprocal traverse movement makes it possible to reduce the number of overlapped layers in yarn winding.
2.4 Control device for the number of turns in a skein
The number of turns in a skein is preset by a manual dial on the computer. The number of turns that is being completed by the reel is picked up by a non-contact switch and converted into a signal, which is displayed in digital form on the counter as the number of turns realized by the reel. The precise counter ensures that the number of turns in a skein can be selected and controlled in a correct manner.
Schematic Layout of YG086C Measuring Reel | |||
1. Bobbin pin | 2. Thread guide | 3. Tension regulator | 4. Front panel |
5. Counter | 6. Tension scale | 7. Tension feeler rod | 8. Traverse thread guide |
9. Pointer | 10. Reel | 11. Handle | 12. Electric control |
3. Product Installation and Adjustment
3.1 The product should be placed on a firmly fixed working table (with a height of approximately 0.7m) in the laboratory for usage. It is permitted to insert under the bottom footing of the product so as to enable the pointer to align with the marking line on the front panel when the rider of the tension scale is at zero position.
3.2 The electrical part should be checked before switching on power to make sure there is not any damping or other negative phenomenon.
4 Product Startup and Operation
4.1 Preparations before startup
4.1.1 Check to make sure that the pointer is aligned with the marking line on the front panel when the tension scale is at zero position.
4.1.2 Switch on power and check the machine to make sure that it can operate normally under unloaded conditions.
4.1.3 Preset the tension of reeling on the tension scale according to a required tension for single yarn reeling. Move the rider on the tension scale to the required value position of reeling tension and tighten the knurled screw on the rider. The tension for single yarn reeling can be calculated according to the single yarn pre-tension values specified by the State, which is generally set at 0.5cN/tex of the sample yarn.
Table 1
Linear Density (tex) | 7-7.5 | 8-10 | 11-13 | 14-15 | 16-20 | 21-30 | 32-34 | 36-60 | 64-84 | 88-192 |
(English Count) | (90-71) | (70-56) | (55-44) | (43-37) | (28-19) | (28-19) | (18-17) | (16-10) | (9-7) | (6-3) |
Reeling Tension (cN) | 3.6 | 4.5 | 6 | 7.3 | 9 | 12.8 | 16.5 | 24 | 36 | 70 |
a. When skeins are reeled simultaneously from 6 bobbins, the value on tension scale 6 is equivalent to the tension for single yarn reeling. If the number of bobbins for simultaneous skein reeling is less than the standard number of this machine, the value on tension scale 6 can be calculated with equation (1) before skein reeling.
------------------------------------------ (1)
where, T --- the value on tension scale 6 after conversion based on the number of bobbins for simultaneous skein reeling.
f0--- the tension for single yarn reeling (i.e. single yarn pre-tension).
n --- the number of bobbins for simultaneous reeling.
b. The coefficient (μ) of dynamic friction between the yarn and tension feeler rod 7 on tension scale 6 varies with different types of yarns. If it is necessary to have a more precise control of reeling tension, the value on tension scale 6 can be calculated with equation (2) before skein reeling.
T (μ) = C·T ----------------------------------------------------(2)
Where, T (μ) --- the value on the tension scale calculated based on different μ values.
C --- the correction factor for μ.
μ --- the coefficient of dynamic friction between yarn and tension feeler rod (actually measured with other instruments).
The value C in equation (2) can be found in Table 2.
Table 2
μ | 0.25 | 0.3 | 0.35 | 0.4 | 0.45 | 0.50 |
C | 1.046 | 1 | 0.955 | 0.912 | 0.873 | 0.837 |
4.2 Operating procedures
4.2.1 Place bobbins on bobbin pin 1.
4.2.2 Thread yarn from the bobbins through thread guide 2 before going through tension regulator 3, tension feeler rod 7 and traverse thread guide 8. Then, clip yarn ends on to the gripper on reel 10 one by one.
4.2.3 Press the manual key on counter 5 at the position of the required number of turns in a skein.
4.2.4 Turn the speed regulating knob on electric control 12 toward the required indication position for a reel speed, which is generally set at 200 r/min approximately.
4.2.5 Switch on power and press the “START” button on electric control 12 (after zero clearing of the figure on the counter). The reel stops by itself when the number of turns in a skein preset on the counter is reached by the reel rotation.
a. Before winding skeins onto the reel, special attention should be paid to make sure that the rider on the tension scale is placed at the position of the required reeling tension, and pointer 9 on tension scale 6 points at the marking line on front panel 4, i. e. the tension scale is under a balanced condition during reeling. If it is not correct, the wrapping angle between the yarn and two open-type parallel tension rods on tension regulator 3 can be adjusted so that pointer 9 can point at a position near the marking line on front panel 4. It may also be possible to turn the speed regulating knob on electric control 12, i.e. changing the reel speed, for pointer 9 to point at the marking line on front panel 4. A slight swinging of pointer 9 is allowable during skein reeling.
b. When adjusting tension regulator 3, make sure that the yarn is winded onto the reel through traverse thread guide 8 by way of the bottom surface of tension feeler rod 7 after passing over the top surface of the thicker tension rod on tension regulator 3. The vertical position of traverse thread guide 8 should not be changed arbitrarily, or otherwise, the accuracy of tension scale 6 will be negatively affected.
4.2.6 Knot the head and tail ends of the yarn in each skein separately, keeping the joint length under 1cm.
4.2.7 Lower down one of the movable lobes of reel 10 inwardly. Then, take down each skein one by one before replacing the movable lobe of reel to its original position.
4.2.8 Reel the second batch of skeins by repeating the procedures above.
4.3 Switch off power after finishing operation.
4.4 Discard the skeins that were reeled when tension scale 6 was under imbalanced conditions during winding (i.e. the tension of reeling was not in conformity).
5 Product Maintenance
5.1 The circumference of reel 10 and the indication value of tension scale 6 are strictly calibrated before product delivery and should not be disassembled and changed arbitrarily.
5.2 The machine should be kept clean regularly.
Guangdong Hongtuo Instrument Technology Co.,Ltd has been specializing in density testing field on developing, innovating and producing since the year it was establised.