EPR-654 (MH20I) precision three-coordinate technical solution + image CCD measurement

the machine configuration

3. Quality assurance and technical services
1. Installation and acceptance:Yixin Company is responsible for machine packaging and transportation, on-site installation, and commissioning. The machine is checked and accepted in accordance with the People’s Republic of China National Metrology Technical Specification JJF1064 "Coordinate Measuring Machine Calibration Specification", and both parties have signed for approval.
2. Training:Yixin Company will go to the buyer's site for free three-day training for two persons.
3. Warranty period:After the buyer passes the test and acceptance, the measuring machine will be guaranteed for free for 12 months, but not more than 13 months from the actual delivery date.
4. Technical service:Yixin company promises real-time telephone consultation and guidance to solve customer problems, if necessary, 48 hours to solve the problem on the customer site, responsible for the service for life.
4. Description of technology, function and characteristics
1. Host

 
(figure 1)

Main materials and parts:00 special high-quality granite platform and three-axis guide rail, precision casting processing aviation aluminum alloy column, British RENISHAW high-precision grating, reading head length measuring system, SMC precision air filter and automatic detection control device, imported international Well-known brand DC servo motors, German FESTO air pipe joints, high-quality air bearings, non-linear spring systems imported from Germany, German IGUS low-friction and noise-free drag chains and high-flexible drag chain cables, American GATES high-performance timing belts, Imported precision ball bearings from the United States, high-grade automotive-grade imported industrial finishes, etc.
1.1 The gantry movable structure and the integral worktable have the characteristics of strong load-bearing capacity, wide workpiece placement space, and convenient loading and unloading. All three-axis guide rails are made of high-quality granite materials, so that the three-axis have the same temperature characteristics, so it has good temperature stability, anti-aging deformation ability, good rigidity, and minimal geometric deformation; processing and inspection of new granite guide rails jointly developed by professional granite manufacturers The technology improves the processing accuracy of granite guide rails to a new level.

 
(figure 2)

1.2 The use of high-precision air bearings and the surrounding bearing layout design (as shown in Figure 1) improves the rigidity and stability of the machine. Even if it works for a long time, it can maintain high accuracy and ensure the excellent dynamic characteristics of the machine.
1.3 The unique Z-axis anti-rotation design is an important part of determining the accuracy of the measuring machine. The reliable anti-rotation structure design can obtain high accuracy even when the probe extension rod is used.
1.4 The application of a unique non-linear spring system (patented technology) (as shown in Figure 2) reduces the influence of the small error of the guide rail on the measurement accuracy, and at the same time ensures that the equipment has a higher environmental temperature adaptability.

 
(image 3)

1.5 The three-axis adopts high-performance synchronous belt transmission, which can not only obtain high movement speed to improve measurement efficiency, but also minimize the transmission inertia to increase movement acceleration; the vibration isolation design of the transmission system makes it possible for the machine to move at high speeds. Minimize the influence of mechanical vibration on measurement accuracy.
1.6 Imported low-friction and noise-free drag chains reduce the external force interference of various motion axes, and at the same time improve the flexibility and reliability of each motion axis.
1.7 The beam adopts a unique guide rail structure (as shown in Figure 3). The triangle is the shape with the largest section perimeter in the same area. The triangular guide rail ensures the maximum guide air bearing span under the condition of minimum inertia, which greatly improves the anti-rotation accuracy of the guide rail.
1.8 The length measurement system adopts the British RENISHAW high-precision reflective metal strip grating ruler and reading head, which has extremely high precision and precision stability.
1.9 The SMC high-precision air filter can make the compressed air reach a very high degree of cleanliness to effectively protect the air bearings and guide rails. At the same time, the automatic drainage device makes the operator more worry-free and labor-saving when using it, and avoids equipment damage caused by forgetting to drain. The all-digital gas source detection device strengthens the sensitivity of gas source fluctuation detection and minimizes the influence of gas source on measurement accuracy.
1.10 The complete safety protection device can lock the three-axis in time when some accidents occur, avoiding bigger accidents and protecting the safety of the machine.
1.11 The design of the whole machine conforms to the principle of ergonomics, it is simple and convenient to use, easy to maintain and maintain.

 
(Figure 4)

2. Control system
The RENISHAW UCC control system (as shown in Figure 4) is a CNC system specially designed and manufactured for CNC coordinate measuring machines. The control system adopts the principle of separating the control layer and the application layer. It is the height of the coordinate measuring machine (CMM). Precision, accuracy, and high efficiency provide a solid foundation. The control system adopts Ethernet interface and computer communication, no need to expand any computer communication interface, also reduces unnecessary external wiring, and ensures the high reliability of the system.
2.1 The drive system is driven by a DC servo motor, and the three axes can be driven by the motor without gap and vibration according to the speed T curve or S curve.
2.2 According to the 3-axis closed-loop motion configuration, 3 TTL orthogonal pulses can be input, and vector control can be realized.
2.3 The control system is safer and more reliable. It provides multiple control modes. When the shutdown problem occurs, the system can switch to the corresponding mode to stop the machine in the first time. The user does not need to worry about the accident of the speeding car. The function of online fault diagnosis.
2.4 The UCC control system supports a variety of error detection methods, which can easily correct the accuracy of the measuring machine.

 
(Figure 5 )

2.5 Faster speed, stable motion, and higher efficiency. In the path planning of multi-point continuous motion, you can either follow a straight line or an arc path, which makes the measurement of circular workpieces more convenient.
2.6 The control system is stable and reliable, and maintenance is simple. The separation of the control layer and the application layer makes the system's problem diagnosis and resolution easier and clearer, and the phenomenon that problems on one level spread to another level will no longer exist.
2.7 The humanized design of the control box (as shown in Figure 5). The control box provides users with simpler and more reasonable buttons and joysticks. It not only has traditional speed control, but also provides measurement shortcut keys to make the whole measurement process easier and more convenient.
3. Rational DMIS measurement software
Rational DMIS software is a software certified by the German Institute of Physics and Technology (PTB). It has the ability to express in multiple languages (including Chinese). It is an international measurement software that provides users with advanced technology, complete functions, and stable performance. , Simple and convenient measurement guarantee.

(Figure 6)

3.1  The Rational DMIS software is built on the Windows platform and is very easy to operate.
3.2  Basic measurement functions (Figure 6):

1. Measurement and evaluation of geometric elements: points, straight lines, planes, circles, ellipses, cylinders, cones, balls, arcs, keyways, etc. Convenient operation, the operator only needs to perform simple geometric element decomposition of the measured workpiece to distinguish how many geometric elements the measured workpiece consists of, and then the measurement can be completed quickly.
2. Construction functions: intersect, divide, project, fit, tangent, parallel, perpendicular, translate, offset, mirror, extract, limit, and rotate.
3. Shape error evaluation: straightness, flatness, roundness, cylindricity.
4. Position error evaluation: distance, included angle, parallelism, perpendicularity, inclination, concentricity (concentricity), symmetry, position (two-dimensional and three-dimensional), circular runout, full runout.
5. Rational DMIS software is convenient and simple to operate, and it perfectly supports drag-and-drop operation, which simplifies the operation process. From measurement, construction, tolerance evaluation to the output of the final report, it can be completed by simply dragging the mouse.
6. Measurement and evaluation of curves and curved surfaces. Powerful curve and surface measurement function, which can perform error analysis on curved surfaces and curves through unilateral or bilateral tolerances.
7. RENISHAW probe and stylus library. It is convenient to connect, configure, calibrate and use various probes and styluses of RENISHAW.
8. Intelligent workpiece alignment. That is, the commonly used 3-2-1 coordinate system establishment method, with graphical prompt operation, simple and convenient operation. It supports the RPS positioning method commonly used in the automotive inspection tool industry, the best fitting method commonly used in surface measurement, and multiple coordinate system establishment methods such as multi-point fitting, three-point offset, and two-point offset.

(Picture 7)

1. Multi-coordinate system, multi-probe function conversion is convenient. The software allows multiple coordinate systems to be established in a measurement project, and allows multiple probes to be used. By clicking or dragging with the mouse, the conversion between each coordinate system or each probe can be realized.

3.3 Two-way data transfer function with CAD system (Figure 7):

1. Directly receive the mathematical model of IGES, STEP, DXF and other formats transmitted by CAD, and can display the mathematical model graphics transmitted by CAD in solid or wire frame.
2. It can realize the layering and coloring of CAD digital model, and can also realize the import of original layering and color separation of CAD digital model, multiple CAD digital model import, CAD digital model mirroring, automatic recognition of theoretical elements of CAD digital model, support points Cloud data processing.
3. The theoretical value can be directly read in the CAD model and compared with the measured value.
4. It can directly simulate the measurement offline on the CAD digital model and compile the measurement program.
5. The measurement results can be output to the CAD system in IGES format.
6. It can survey and map the workpiece to be measured, and can also do reverse engineering.
7. It can accurately align the CAD digital model of complex workpieces, and rebuild after measurement. And can display the CAD model from multiple views.

3.4  Graphics function

1. Three-dimensional solid model display, so that the measured workpiece can be displayed intuitively. The three-dimensional graphics of the measured workpiece and the measured geometric elements can be displayed on the computer screen, and the three-dimensional graphics and size report of the workpiece can be printed out.
2. The movement status of the measuring machine can be displayed. With the support of Rational DMIS software, the three-dimensional model of the coordinate measuring machine can be displayed on the computer screen in real time. In the actual measurement process, the actual measurement motion of the probe can be simulated and displayed, that is, the motion posture of the measuring machine and the probe can be simulated in real time. The position of the coordinate measuring machine can be rotated by moving the mouse to adjust the size and proportion of the viewing angle. In addition, the workpiece has a three-dimensional solid model display, which greatly facilitates the operator. When repeating the measurement of the workpiece in the future, the measurement process of the coordinate measuring machine can be understood by observing the screen.
3. Graphical display output of measurement results.
4. The three-dimensional geometric element icons, abundant dynamic toolbars, graphical toolbars and three-dimensional graphics display the measured geometric elements, so that the operator can operate intuitively and clearly.

3.5  The two-way transmission of DMIS standard format measurement program supports DMIS5.0 standard.
3.6  Self-learning programming function. Convenient self-learning function can automatically compile the entire measurement process into a measurement program. The sequence of measurement is the sequence of program measurement, and the entire program can be edited and offline simulated measurement can be performed.
3.7  The intelligent online assistant can give voice and text prompts for each step of the user's operation, helping the user to master all the operations in a short time.

(Picture 8)

3.8  With power-off protection function and self-diagnosis function.
3.9  Measurement result output (as shown in Figure 8)

1.   Support traditional output reports, Excel spreadsheet output reports, graphic reports, and user-customized output reports.
2.   Graphic report. The line-up graphical box display can display the nominal value, actual measured value, error, and upper and lower deviations of the setting. The interface of the measured element with the measurement result value in the graphic report can be zoomed, rotated and moved on the screen to obtain views in all directions. The automatic arrangement can also be used, which greatly facilitates the operator and makes the measurement results clear at a glance.
3.   Rational DMIS software can process the inspection results of any tested workpiece and output user measurement reports.

4.1 A set of CCD imaging probe system:

1. High-precision industrial CCD camera system with resolution of 400,000 pixels.
2. 0.7 ^4.5 times multi-speed zoom lens
3. Frame grabber
4. Brightness adjustable ring lighting source
5. Calibration orifice plate
6. Image line

4.2 Functions of Rational DMIS image measurement software:

• Functions of Rational DMIS image measurement software:
• With auto focus function, you can find the best sharpness of the image by yourself.
• It can realize the combined calibration and combined measurement with the trigger probe.
• For any unknown contour curve, as long as the starting point and ending point are determined and the scanning direction is specified, the automatic tracking and scanning measurement of the unknown curve can be realized.
• Smart keys can achieve efficient and fast measurement, and automatic measurement of elements can be achieved without complicated operations.
• Not only can the complete circle be captured and evaluated, but also the gaps on the contour can be filtered out, and the incomplete circle can be measured.
• The number of collection points can be set.
• The points collected by misoperation can be easily edited and modified with an eraser.
• Can support a variety of lighting sources.
• It has the same rich error evaluation function as trigger measurement.

4、Probe system

5. Environmental requirements:

• Temperature range: 20±2°C, temperature change: <0.5°C/h <1°C /24h
• Humidity range: 30%～70%
• Air source pressure: 0.6MPa～0.8MPa
• Maximum air consumption: 200L/min (0.45MPa)
• Power supply: 220V±5 %, 50Hz
• Maximum power: 1 KW
• Ground vibration: vibration frequency ≤10 Hz, amplitude ≤0.5μm
  10 Hz<vibration frequency≤30 Hz amplitude ≤1μm
  Vibration frequency ≥30 Hz, amplitude ≤3μm