Construction of electrical cabinets
Design printed circuit on Altium
A Design printed circuit: Đồ án tốt nghiệp
Figure 5.50 Layout of board circuit
Manufacture of electrical cabinet
Monitoring and Control Interface
Connection section
Connection section: This part of the application establishes a connection between the user’s computer and the sandpaper washing machine through UART communication.
To establish the connection, the user needs to enter the correct COM port and Baudrate,and then press the “Connect” button.
Parameter setup and basic control section
This section includes settings for temperature, Kp, Ki, Kd, set timer, Jog +, Jog-, and water pump.
Temperature setting and PID parameters: used to control the water temperature in the washing tank so that it responds as quickly and stably as possible.
Set timer: sets the desired time for the sandpaper washing system.
Jog +, Jog - : used to control the working arm to the desired position When in normal running mode, the machine will control it automatically.
Water pump: when the water pump button is pressed, water will be pumped into the washing tank When the water level reaches a sufficient level for sandpaper washing, the system will automatically turn off the water pump.
Run: when the temperature and water level are sufficient for sandpaper washing, the user presses the "Run" button to start the washing process. Đồ án tốt nghiệp
Water level monitoring: At the beginning, when the washing tank has no water, the interface will display the water level in red When the washing tank has enough water for the washing process, the interface will display the water level in green.
Temperature monitoring: It shows the temperature in numerical form and also through a chart to allow users to easily track the temperature.
EXPERIMENT RESULTS/ FINDINGS AND ANALYSIS
Establish Target Specifications
1 It needs to be high durability.
2 The surface of the sandpaper must still be clean.
3 The surface of the sandpaper must still be usable.
4 It needs to be high power.
5 It is easy to product.
7 5 Dimension 3 Đồ án tốt nghiệp
Table 6.2 Metrics and needs correlation
1 It needs to be high durability
2 The surface of the sandpaper must still be clean
3 The surface of the sandpaper must still be usable
4 It needs to be high power
5 It is easy to product
Effici Recyc Total Pric Mater Time Dim
Washi ensi ency le mass e ials ng on
Experiments
To test the working range and reliability of the machine, we base on two actual test, known as Static test which estimates static parameter like dimension, total mass, stiffness, and other no-electricity parameters.
I use a straight steel ruler to measure the dimensions Using my eyes to read all measured value As for total mass, I measure each of part and esimate machine’s total mass.
Table 6.3 Dimension and measured value
METRICS DESIGN VALUE ACTUAL VALUE
- Check the working ability of the machine.
- Check the safety of the device
- After putting the machine in the test position and making the electrical connection, check the safety, close the power supply and safely put the machine in 10 liters of water.
- Consider the structure of the washing machine when operating.
- Machine works stably without vibration during running time.
A Cleaning solution test by temperature:
The group sets its own criteria to evaluate the effectiveness of the machine: 80% cleaning capacity and the roughness of the surface is still usable Results of factors affecting the washing process:
- Solven: dishwashing liquid. Đồ án tốt nghiệp
Table 6.4 Result depend on Temperature
• Conclusion: Based on the results obtained, we can see that at unheated water temperature, the results are not good But when the water temperature is increased, the results are better.
B Cleaning solution test by solven:
- Frequency: 40kHz Đồ án tốt nghiệp
Table 6.5 Result depend on Solvent
• Conclusion: Based on the obtained results, we can see that in 2 different environments, the results are quite similar But the performance is not very good So the above 2 solvents are not suitable solvents.
C Cleaning solution test by power:
We will in turn change the power of the machine by changing the number of transducers.
Table 6.6 Result depend on Power
No Number of Power Result
Check the working surface of sandpaper test.
To test the surface of the sandpaper, the team decided to use the hand and eye method to assess the quality of the surface
When touch it, I can see that the roughness of the surface does not change much.Sanding ability is still relatively effective compared to the original.
Comments
During the experiment, the parameters affecting the washing process can be changed easily and accurately We also found that the influence of temperature, solvent and power on washing.
However, determining the cleanliness parameter takes a long time, due to sensory evaluation, the evaluation level is only relative Limited equipment, so it cannot be evaluated according to the calculated level.
CONCLUSION AND FUTURE DEVELOPMENT
Conclusion
After spending time researching, researching and implementing the graduation project with the topic "Design and manufacture sandpaper washing machine in woodworking by ultrasonic wave technology", the group has designed a machine model with the results presented below:
The achieved results are as follows:
- The model is designed, constructed, and completed with meticulous craftsmanship, where each detail is carefully processed and connected to form a solid unit, ensuring both sturdiness and aesthetic appeal.
- Meets the demand for automatic and precise operation.
- The sandpaper washing results are also relatively clean.
Future Development
- Use large capacity thermistor for better temperature response time.
- Try adding other solvents to make the sandpaper cleaner. Đồ án tốt nghiệp
- Do more research to speed up the sandpaper washing speed.
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