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Report Writing 1

₹1000-2000 INR

Closed
Posted over 2 years ago

₹1000-2000 INR

Paid on delivery
Control of 3D printer nozzle temperature The hot end of a 3D printer can be seen in the schematic in Figure 1. The nozzle is heated using a heating element, while a thermocouple is used to record the temperature. The hot end uses two cooling fans: the hot end fan and the layer cooling fan, where the blue lines indicate cold air and red lines indicate hot air. A controller is used to maintain the temperature at a constant 200°C. Figure 1: Schematic of 3D printer hot end For the system shown in Figure 1, the layer cooling fan suddenly turns on and the thermocouple temperature drops to 190°C. Part 1: Using a block diagram, sketch out the interactions between the controller, process, and sensor. Define the following: 1. Set point 2. Process variable 3. Control variable 4. Disturbance 5. Error Part 2: Figure 2: Schematic showing heating cycle of hot end (Figure 2 shows a schematic of the thermocouple data as the 3D printer hot end is heated from roomtemperature to 200°C). CHECK ATTACHED FILE FOR FIGURE As the temperature hits 200°C, it overshoots to 205°C before returning to a relatively steady of 200°C +/- 1°C. The system uses a PID controller, where the values are set at: • Kp = 21.33 • Ki = 1.13 • Kd =98.22 Questions: • For the system above, explain why the thermocouple overshoots? • Sketch the expected temperature time profile (i.e. the graph in Fig. 2) from room temperature to 200°C for the following 3 scenarios: 1. Kp is halved, the other two values are unchanged 2. Ki is doubled, the other two values are unchanged 3. Kd is halved, the other two values are unchanged • If a full PID controller was not available, which controller would be more suitable for the system described in figure 2: PI or PD. Explain your answer.
Project ID: 32238365

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Active 2 yrs ago

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Flag of INDIA
Pune, India
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Member since Dec 20, 2017

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