Workshop Theoretical Part-II
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Questions and Answers

What should you do to ensure a smooth surface when resuming a print after an outage?

  • Remove excessive filament at the nozzle with tweezers. (correct)
  • Wait for the printer to cool down.
  • Increase the nozzle temperature.
  • Restart the printer.

    • The DMSCREATE DP-X 3D printer can resume printing after a power outage at any time.

    False

    What should be checked if extrusion is not working at the start of a print?

    Ensure that the nozzle temperature has been set to match the filament.

    Before inserting the filament, make sure it passes through the _______ first.

    <p>filament sensor</p> Signup and view all the answers

    Match the troubleshooting issues with their corresponding solutions:

    <p>Filament tangling on spool = Ensure proper spool arrangement Nozzle clogged = Replace or clean the nozzle First layer not adhering = Reduce bottom layer speed Filament diameter incorrect = Measure filament diameter precisely</p> Signup and view all the answers

    Which of the following is NOT a reason for insufficient filament flowing?

    <p>Nozzle temperature is too high</p> Signup and view all the answers

    Cleaning the print platform can help the first layer adhere better to the heat bed.

    <p>True</p> Signup and view all the answers

    What is the suggested speed for the bottom layer of a print if the first layer does not adhere?

    <p>Approximately 20mm/s</p> Signup and view all the answers

    What can cause gaps or hollows in the top layer of a 3D print?

    <p>Insufficient number of layers</p> Signup and view all the answers

    Increasing the withdrawal speed can help reduce wire drawing defects.

    <p>True</p> Signup and view all the answers

    What should be checked if a 3D print model is melting?

    <p>Printing temperature and cooling for the hot end</p> Signup and view all the answers

    Layer shifting can be caused by a print head moving too _____ or mechanical issues.

    <p>fast</p> Signup and view all the answers

    Match the following issues with their potential causes:

    <p>Grinding filament = Nozzle clogged Not extruding = Filament runs out Layer shifting = Speed too fast Printing model melting = Temperature too high</p> Signup and view all the answers

    Which of the following settings can lead to excessive temperature differences causing cracking in ABS?

    <p>Cooling not sufficient</p> Signup and view all the answers

    A clogged nozzle can cause filament to grind and not extrude properly.

    <p>True</p> Signup and view all the answers

    To resolve filament not extruding during the printing process, check if the filament has run _____ .

    <p>out</p> Signup and view all the answers

    What is a common cause for stripes or bulges on the surface of a print?

    <p>Extruding instability</p> Signup and view all the answers

    A high printing temperature can cause wrinkles on the surface of a print.

    <p>False</p> Signup and view all the answers

    What should be checked if the touch screen has no response?

    <p>Check if the cables connecting the screen are loose.</p> Signup and view all the answers

    The cause of motor shaking or abnormal sound could be due to improper __________ of the motor cable.

    <p>connection</p> Signup and view all the answers

    Match the issues with their likely causes:

    <p>Vibration = Printing speed is too fast File not printing = SD card is not readable Print stopped halfway = Gcode file is corrupted Touch screen no response = Screen was broken</p> Signup and view all the answers

    What should be done if the SD card is not readable?

    <p>Reboot the machine</p> Signup and view all the answers

    The Z axis being not straight can lead to a rough print angle.

    <p>True</p> Signup and view all the answers

    Name one cause of extruding unevenly.

    <p>Hot end clogged</p> Signup and view all the answers

    What is the recommended temperature range for the filament to flow properly?

    <p>180-190°C</p> Signup and view all the answers

    It is important to insert the filament into the hotend without preheating it first.

    <p>False</p> Signup and view all the answers

    What should be done if the filament feels any resistance during installation?

    <p>Rotate the filament.</p> Signup and view all the answers

    The switch to select the correct voltage mode (110V/220V) is located on the _____ supply.

    <p>power</p> Signup and view all the answers

    Which of the following is NOT a parameter listed for printing?

    <p>Color Parameter</p> Signup and view all the answers

    Match the components with their functions:

    <p>Hotend = Heats and extrudes filament Teflon tubing = Guides filament to the hotend Power supply = Provides electrical power Main board = Controls printer operations</p> Signup and view all the answers

    It is recommended to cut off the bent tip of the filament before installation.

    <p>True</p> Signup and view all the answers

    What visual reference is provided for the assembly instructions?

    <p>Figures</p> Signup and view all the answers

    What is the recommended printing speed for 3D printing?

    <p>50-60 mm/s</p> Signup and view all the answers

    A nozzle diameter of 1.75mm is optimal for 3D printing.

    <p>False</p> Signup and view all the answers

    What is the purpose of viewing the model in 'Layers' mode?

    <p>To check for skipped layers or gaps in the toolpath.</p> Signup and view all the answers

    The diameter of the selected wire is _____ mm.

    <p>1.75</p> Signup and view all the answers

    Match the following components with their specifications:

    <p>Wire Diameter = 1.75mm Nozzle Size = 0.4mm Recommended Print Speed = 50-60 mm/s Shell Print Speed = Reduce speed for outer layer</p> Signup and view all the answers

    Which action should be taken if the GCode file contains special characters?

    <p>Rename it using only English letters, underscores, and spaces</p> Signup and view all the answers

    The CH341SER driver is required for offline printing.

    <p>False</p> Signup and view all the answers

    What is the purpose of adjusting the 4 nuts under the platform?

    <p>To ensure the heat bed is horizontal</p> Signup and view all the answers

    The Z adjustable nut should be tightened if the nozzle is too high from the platform.

    <p>True</p> Signup and view all the answers

    What should you do after clicking 'Print...' in Cura?

    <p>Wait for the temperature to rise before printing starts.</p> Signup and view all the answers

    What file extensions can be loaded into Cura?

    <p>STL, OBJ, DAE, AMF</p> Signup and view all the answers

    To adjust a model's position in Cura, hold on the ______ button and drag the model.

    <p>left click</p> Signup and view all the answers

    Match the following actions with their corresponding functionalities in Cura:

    <p>Zoom in/out = Scroll the mouse wheel Change viewing angle = Right click and move the mouse Rotate = Click rotate button and move the circle lines Lay flat = Minimize adhesion issues during printing</p> Signup and view all the answers

    What should be done after rotating the model in Cura?

    <p>Use the Lay Flat option</p> Signup and view all the answers

    It is necessary to adjust the Z adjustable nut only once for correct leveling.

    <p>False</p> Signup and view all the answers

    What is the first step to load a 3D model into Cura?

    <p>Clear the platform by clicking 'File' -&gt; 'Clear platform'</p> Signup and view all the answers

    What is the primary purpose of CO2 lasers in the material processing industry?

    <p>To cut, bore, and engrave a variety of materials</p> Signup and view all the answers

    Nd:YAG lasers are primarily used for applications requiring low power.

    <p>False</p> Signup and view all the answers

    What is an application of CO2 lasers in the automotive industry?

    <p>Cutting and engraving steel parts</p> Signup and view all the answers

    By varying the intensity of the laser beam, various materials can be _______.

    <p>cut or engraved</p> Signup and view all the answers

    Match the types of lasers with their primary uses:

    <p>CO2 Laser = Cutting and engraving Nd Laser = Boring with low repetition Nd:YAG Laser = Applications requiring high power Fiber Laser = High-speed cutting of metals</p> Signup and view all the answers

    Which of the following is a feature of laser engraving compared to traditional methods?

    <p>Utilizes CNC capabilities for precision</p> Signup and view all the answers

    What is a potential future development for laser cutting machines mentioned in the content?

    <p>Integrating design software to generate part programs automatically</p> Signup and view all the answers

    CNC-controlled lasers can be used without precise control over the laser tool path.

    <p>False</p> Signup and view all the answers

    What is a key advantage of embedded systems?

    <p>Easily customizable</p> Signup and view all the answers

    Embedded systems are typically not used in common electronic devices.

    <p>False</p> Signup and view all the answers

    What does the A-D converter do in an embedded system?

    <p>It converts analog signals to digital signals.</p> Signup and view all the answers

    The Arduino software, known as the __________, is used to upload code to the Arduino board.

    <p>Arduino IDE</p> Signup and view all the answers

    Match the components of an embedded system with their functions:

    <p>Sensor = Measures physical quantity D-A Converter = Converts digital data to analog Actuator = Compares and stores output Processor = Processes input signals</p> Signup and view all the answers

    Which of the following is NOT a component commonly found in a digital thermostat embedded system?

    <p>3D printer nozzle</p> Signup and view all the answers

    Arduino boards can only read digital signals.

    <p>False</p> Signup and view all the answers

    What is one disadvantage of embedded systems?

    <p>High development effort</p> Signup and view all the answers

    Which of the following data types can store a value of -100?

    <p>int</p> Signup and view all the answers

    The setup() function in an Arduino program is executed repeatedly after the loop() function.

    <p>False</p> Signup and view all the answers

    What is the primary purpose of the loop() function in an Arduino program?

    <p>To run the main logic continuously after setup</p> Signup and view all the answers

    The range of values for a _____ data type is from 0 to 65535.

    <p>word</p> Signup and view all the answers

    Which pin type on an Arduino board is designed specifically for reading analog signals?

    <p>Analog Input Pins</p> Signup and view all the answers

    Match the following data types with their bit allocation:

    <p>boolean = 8 Bit word = 16 Bit long = 32 Bit float = 32 Bit</p> Signup and view all the answers

    All Arduino boards have the same number of inputs and outputs.

    <p>False</p> Signup and view all the answers

    What is the main difference between 'char' and 'unsigned char' data types?

    <p>char can hold negative values, unsigned char cannot.</p> Signup and view all the answers

    What is the operating voltage of the Arduino Mega?

    <p>5V</p> Signup and view all the answers

    The Arduino Mega can only be powered via USB connection.

    <p>False</p> Signup and view all the answers

    What type of microcontroller is used in the Arduino Mega?

    <p>ATmega2560</p> Signup and view all the answers

    The Arduino Mega has a total of _____ digital I/O pins.

    <p>54</p> Signup and view all the answers

    Match the following pins with their functions:

    <p>VIN = Input voltage from external source 5V = Regulated 5V output 3V3 = Regulated 3.3V output GND = Common reference point</p> Signup and view all the answers

    Which pin can be used to provide visual feedback on the Arduino Mega?

    <p>PIN 13</p> Signup and view all the answers

    The maximum input voltage recommended for the Arduino Mega is 12V.

    <p>True</p> Signup and view all the answers

    How many analog input pins does the Arduino Mega have?

    <p>16</p> Signup and view all the answers

    What command is used to set the mode of a pin in Arduino?

    <p>pinMode(pin, mode)</p> Signup and view all the answers

    Arduino operates on 3.3V TTL levels by default.

    <p>False</p> Signup and view all the answers

    What is the purpose of the resistor in the LED circuit connected to pin 2?

    <p>To limit the current flowing through the LED.</p> Signup and view all the answers

    The command used to read the status of a digital pin is digitalRead(pin) and to set a pin's value, the command is _____ .

    <p>digitalWrite(pin, value)</p> Signup and view all the answers

    Match the following voltage levels with their definitions:

    <p>VOH = Minimum output voltage for high signal VIH = Minimum input voltage considered as high signal VOL = Maximum output voltage for low signal VIL = Maximum input voltage considered as low signal</p> Signup and view all the answers

    Which of the following statements about communication pins in Arduino is TRUE?

    <p>They facilitate communication with various devices.</p> Signup and view all the answers

    Current flows from less positive to more positive voltages.

    <p>False</p> Signup and view all the answers

    To toggle the state of an LED connected to pin 2, you can use the command ___.

    <p>digitalWrite(2, HIGH) then digitalWrite(2, LOW)</p> Signup and view all the answers

    What library is included with the Arduino software for TWI communication?

    <p>Wire Library</p> Signup and view all the answers

    The bootloader allows programming of the Arduino Mega 2560 without an external hardware programmer.

    <p>True</p> Signup and view all the answers

    What happens when a new sketch is uploaded to the Arduino Mega 2560?

    <p>The board resets and invokes the bootloader.</p> Signup and view all the answers

    Arduino Mega 2560 can communicate with peripherals using the _____ protocol.

    <p>SPI</p> Signup and view all the answers

    Match the Arduino features with their descriptions:

    <p>TWI (I2C) = Communication protocol for multiple devices SPI = High-speed protocol for peripherals Bootloader = Simplifies programming without external tools Automatic Reset = Triggers reset during code upload</p> Signup and view all the answers

    What type of memory is used for storing the program code on the ATmega2560?

    <p>Flash Memory</p> Signup and view all the answers

    The ATmega2560 has 16 digital input/output pins.

    <p>False</p> Signup and view all the answers

    What is the primary function of EEPROM in the ATmega2560?

    <p>To store data that is retained even after the power is turned off.</p> Signup and view all the answers

    The ATmega2560 features _____ analog input pins with a resolution of 10 bits.

    <p>16</p> Signup and view all the answers

    Match the following memory types with their primary use:

    <p>Flash Memory = Stores program code SRAM = Holds temporary data EEPROM = Retains data after power off</p> Signup and view all the answers

    What is one of the specialized functions of certain digital I/O pins on the Arduino Mega 2560?

    <p>UART Communication</p> Signup and view all the answers

    Analog input pins on the ATmega2560 can only measure voltages between 0V and 5V.

    <p>True</p> Signup and view all the answers

    How many hardware UARTs does the ATmega2560 provide?

    <p>Four</p> Signup and view all the answers

    Study Notes

    3D Printer (Chapter 1)

    • Safety Instructions:

      • High temperatures are generated during operation, avoid touching the printer while it is operating
      • Allow the printer to cool down after printing before removing objects
      • Moving parts present potential injury hazards
      • Use in a well-ventilated area due to potential irritants
      • Avoid water or rain exposure
      • Operating temperature range is 8°C - 40°C and humidity range is 20%-50%
      • Use protective eyewear when cleaning or sanding printed models

    • Technical Specifications (Printing Parameters):

      • Printing volume: 300 x 300 x 400 mm
      • Layer resolution: 0.05-0.3 mm
      • Positioning accuracy (X/Y): 0.0125mm, (Z): 0.002mm
      • Extruder quantity: Single
      • Nozzle diameter: 0.5/0.4/0.3/0.2 mm
      • Printing speed: 10-180mm/s (recommended 60mm/s)
      • Movement speed: 100mm/s
      • Materials: PLA, ABS, HIPS, WOOD, PETG, etc.
      • Ambient operating temperature: 8°C - 40°C
      • Operational extruder temperature: up to 260°C
      • Operational print bed temperature: up to 110°C

    • Contents (Chapter 1):

      • Part List 1
      • Product Overview 2
      • Menu Directory 3
      • Assembly Instruction 6
      • Leveling Instruction 13
      • Cura Instruction 18
      • Online Printing 26
      • Offline Printing 29
      • Change Filament 30
      • Resume From Outage 31
      • Trouble Shooting 33

    Part List

    • Components:
      • A variety of parts are listed (examples: usb cable,power cable,heating tube, filament holder, smart card, nozzles,tools, aluminum profile, motors, etc.)

    Product Overview

    • Components Diagram: A diagram of the 3D printer with labeled parts is included.
    • Menu Options:
      • The menu has options for setting temperature, operation, loading/removing filament, and other settings
      • The menu has sections for managing printing processes

    Assembly Instructions

    • Detailed steps for assembling the 3D printer are provided in diagrams.
      • Steps for assembling various components (frames, motors, heating bed etc.) are shown.
      • Specific measurements for each component are given; bolt type (e.g. M5x20), and more are shown.

    Leveling Instructions

    • Leveling the Platform: Accurate leveling is essential before printing. Steps on how to do this, and helpful diagrams are provided.
      • Steps for installing leveling components on the printer are included.
      • The procedure includes how to use software to home the machine
      • A4 paper is used as a measure for leveling.
      • Critical steps on adjusting and leveling the 3D model in the software are part of the process.

    Cura Instructions

    • Software Installation: Steps on how to install a slicer software like Cura_15.04 are provided.

      • Installing the Cura software on a computer using a SD card is explained.
      • Instructions are given on using Cura to prepare 3D model files.

    • Online Printing: Describes how to connect the 3D printer to a computer.

    • Offline printing: How to print without connecting to a computer

    Troubleshooting

    • Issues & Solutions: A list of common issues and their solutions is provided.
      • Issues listed include extruding, clogged nozzle, layer issues, vibration, etc.

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    Related Documents

    Chapter 3(Arduino) PDF
    Laser Cutting Machines PDF
    3D Printer User Manual PDF

    Description

    This quiz covers essential safety instructions and technical specifications for operating a 3D printer. Understand the operating conditions, material compatibility, and safety precautions necessary to ensure a safe and efficient printing experience. Perfect for students and enthusiasts wanting to deepen their knowledge of 3D printing technology.

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