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Views: 1 Author: Site Editor Publish Time: 2024-09-25 Origin: Site
General Introduction
Chemical Filament Evenness Tester SPIN5900 is designed for measuring and analyzing unevenness of filaments，evaluating quality of filaments and guiding the production of filaments. Since the instrument uses the advanced digital processing, hardware and software micro-processing technology and automatic control technique, it can measure with high efficiency and accuracy, good stability and consistence. As a result, it would process bright future in the field of modern textile industry.
Advantages of Evenness Tester:
① Convenient Operation：The software system of the host computer is based on Windows. The setting is convenient and easy-to -operate. The panel of test unit is supplied with operation buttons and ordinary tests can be completed just by one button.
②Mechanical twisting: Technology based on mechanical twisting, the process is stable and easy to control.
③ High Automation：Combined with push rod for zero point setting, the instrument realizes fully automatic zero point setting.
④ Rich Information Output： Evenness Tester can record rich information, such as coefficient of variation(CV) of silver irregularity, spectrogram with high accuracy, DR value with several grades, unevenness curve, and linear density distribution curve and so on.
⑤ Drive System：The instrument is used imported servo system, enhancing its reliability greatly.
⑥Advanced Technique：The instrument is used advanced computer technology such as PCI bus unit, ensuring the advanced technology of the evenness tester.
2.2 Instrument Components and Working Principles
Evenness Tester consists of test unit, host processor, printer and a whole set of accessories.
The test unit is used for drawing-off the tested filaments through the measuring slot under proper tension, and for translating the linear density unevenness into corresponding electric signals and transmitting the signals to the host processor.
The host processor is the center of data processing. It fulfils parameters setting, system monitoring, collecting and analyzing the uneven signals of filaments. In addition, it can display visually the test results, save and print the data automatically.
Evenness Tester is integrated with a printer which can printout various diagrams and data for the users.
The sample is drawn through the correct measuring slot at a certain speed. The measuring head translate the quality variation (linear density) of the filaments into corresponding electric signals, which are processed by the control board of the test unit and transmitted them into the host processor. Then the data collecting board of the host processor translates the analog electric signals transmitted by test unit into digital signals. The host processor calculates the parameters of CV%, U%, the Spectrogram parameters, draws spectrogram, saves and prints the test results.
Test parameters：
Measuring range：10dtex~1670dtex
Test speed ： 25 m/min
50 m/min
100 m/min
200 m/min
400 m/min
Evaluation time:10s ~ 20min, continuously adjustable
CV% or U% and coefficient of variation – length curve
Indication range of CV% or U%：
0.20%~99.99%
Coefficient of variation – length curve
Segment length: 1.7cm~1000m
Deviation rate（DR%）
Segment length and actuating limits：
20cm, +35%
20cm, -30%
1m, +5%
1m, -5%
Spectrogram
Wave length range：1.7cm~2000m
Number of channels： 170
Linear density-frequency profile
Output two linear density frequency profiles related to the mean linear density, range of -100% to +100% and range of above+100%, respectively.
Statistical profile
Output all the statistical profiles of the measuring indexes (CV%、the number of yarn flaws and so on). The statistical time can be set at the unit of day as your own.
Power
Voltage 220V ± 10%
Frequency 50Hz ± 5Hz
Power dissipation ≤ 500VA
Compressed air
When Evenness Tester is at work, the compressed air is needed for carrying out part of the mechanical actions. The air pressure can be adjusted to 0.6~ 0.8 MPa when the retrieving function of waste yarns is at work.
Room climatic conditions
Evenness Tester belongs to precision instrument, so the room condition should be clean and tidy and without smoke and dust.
Humidity: 60%±15%
Temperature: 20℃±5℃
3.1 Basic Operation Procedures
3.1.1 Switching on the instruments
First switch on the electrical outlet power, then the electrical power of displayer, printer and the test unit, finally the host processor is powered.
The instrument must first be allowed to warm up for 30 minutes before the measurement are undertaken.
3.1.2 Drawing-off the materials
In terms of the fineness of the materials, the positioner is moved until the holder comes to lie below the measuring slot.
When filament are measured, they are drawn through the correct measuring slot and between the “ rollers off ”. The switch “coming away” is pressed for opening the “ rollers off ” to put the filament between the drawing-off rollers. Then the switch “coming away“ is loosed, the rollers hold the filament .
According to the kind of sample measured, click on the “Parameters Setting” button by mouse to enter the menu of parameters setting.
Before you begin measurement, you must determine the count of the materials to be tested and select the correct slot number, and set the measuring speed and number of measuring times for the content of output reports.
Ensure the correct parameters setting, click on the “TEST” button by mouse to enter the measuring menu.
When the operation dialog box appears under the measuring interface, there are three ways to continue operation:
a. Click on the “OK” button to continue operation or click on the “CANCEL” button to cancel operation by the left key of mouse.
b. Press the “Space” button on the keyboard.
c. Press the “TEST” button on the panel of test unit.
For measurement on filament when the drawing-off dialog box appears on the screen, you first confirm the correction of inputting filament and use one of the three ways mentioned above to operate. The measurement start. The push rod for zero-setting is pushed out of the measuring slot.The zero point will now be set automatically and the zero point setting button lights up in the same time. After zero point setting, the button illumination goes out and the push rod for zero-setting draws back. The measuring unit is now ready to begin.
After completion of the pre-set measuring time, an alarm signal is sounded, reminding you of exchanging the materials and beginning the next measurement according the procedures mentioned above.
After completion of test batch, the system report contains the following statistical data: Mean Value (Mean), Standard Deviation (Sd), Coefficient of Variation between Bobbins (CVb), and 95% Confidence Interval (Q95%) and so on.
After completion of measurement, click the “print” button by mouse and the measuring results are output by printer. If necessary, click the diagram to be selected and the diagram information such as spectrogram can be printed out as your own.
You can check the measuring data on the menu of “Showing Result ”.
3.1.6 Switching off the instruments
After the measurements in a day are completed, the instruments should be powered off. Before the instruments are switched off, you should exit the system first and the host processor will be powered off automatically. Then turn off the display, the printer, the switch of Measure unit; finally switch off the electrical outlet power and the air valve.
When you switch on the host processor, the computer will carry out self-checking of the system and Windows operation system starts. Then the copyright information appears on the screen and the system enters the Testing instrument software automatically. The main menu of Testing instrument software consists of seven items, including “Parameters Setting”, “measurement”, “results show”, “system self-checking”, “statistical analysis”, “system help” and “system exit”.
Click on the button of “parameters setting” of the main menu by the left key of mouse, the system enters the menu of “parameters setting”. The menu is mainly used for setting the user information, measuring conditions and output information by printer. The menu of “parameters setting” is shown as Fig. 4.
“Operator”, being shown on the heading of the reports, can be typed in by the keyboard. If you want to type in Chinese characters, you can press the button of “Ctrl” and “Space” at the same time and the system will enter the way of typing in Chinese character. By pressing again the button of “Ctrl” and “Space” at the same time, the system will be back into the way of typing in English.
“Name of the Sample”, being shown on the heading of the reports, can be typed in by the keyboard.
“Testing No.” refers to the measuring batch No. at present. After completion of test batch, the measuring results will be saved as the name of measurement No.
Note:
The information of “Testing No.” typed by the users can’t be over 25 characters, which can only be numerals or letters as well as Chinese characters, and there is no any character between them, such as “>”, ”<”, “？”, “。”, “.”, “，”, “\”, and “/” and so on.
In order to be convenient for checking, “Testing No.” usually includes the specification of the material measured.
“Yarn Count” refers to the fineness of the yarn measured and its unit is dtex，typing in only by numerals (including decimal fractions)
“Fiber Count”, being used for specialist analysis system, refers to the fiber fineness of the yarn measured and its unit is tex，typing in only by numerals.
“Fiber Length”, being used for specialist analysis system, refers to the fiber length of the yarn measured and its unit is mm，typing in only by numerals.
“Testing Speed” is used for setting the drawing-off speed of materials measured. Choose the appropriate options by single click on the left key of mouse.
The options of measuring speed are shown as Table 1. For measurement on yarns, 400 m/min of the measuring speed is usually selected. For measurement on the long-term cyclic irregularity of yarns, 400 m/min of the measuring speed is selected. However, such high speed may lead to the deviation of the number of filament faults.
