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How to Make (Almost) Anything 3-Axis CNC Machine

How to Make (Almost) Anything 3-Axis CNC Machine. Brandon Blott Madhu Josyula Advised by Dr. N. Natarajan. Overview. CNC Machines Machines used for rapid prototyping of custom PCBs, wood, plastic and foam parts Progress We have ordered all the parts needed for the CNC

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How to Make (Almost) Anything 3-Axis CNC Machine

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  1. How to Make (Almost) Anything3-Axis CNC Machine Brandon Blott MadhuJosyula Advised by Dr. N. Natarajan

  2. Overview • CNC Machines • Machines used for rapid prototyping of custom PCBs, wood, plastic and foam parts • Progress • We have ordered all the parts needed for the CNC • The Spindle tool head has been fabricated • The XY Table can be controlled precisely by the PIC • Software installation started. LinuxEMC working. • Goals: • To make an accurate 3-Axis CNC machine • To be able to assist other Senior Design groups by printing low cost PCBs

  3. Design Matrix Bow Shocks - Proposal Presentation

  4. System Block Diagram Computer Cad.py LinuxEMC MCU Motor Driver X - Motor Y - Motor Z - Motor Spindle Z - Axis XY Table Brandon Blott Madhu Josyula

  5. Microprocessors • LinuxEMC sends digital signals through Parallel Port • Master MCU receives all signals and divides by axis • Slaves PICs sends instructions to motors 3D CNC- Proposal Presentation

  6. Electronic System • PIC16 MCUs • The PICs will to communicate with the stepper motors and control the fine movement • Has pre-existing code that can be leveraged • L298 Motor Driver • Provides 4 Amps of current • Easy to use • Heat sinked

  7. Command and Data Handling • A Gerber file will be converted by Cad.py to G-Code • Linux EMC will take the G-Code and send instructions to the MCUs • The MCUs will convert the instructions to voltage pulses to the stepper motors Gerber File G Code Instructions Voltage Pulses

  8. Linux EMC Outputs Uses IEEE 1284: Standard for bi-directional parallel communications 3D CNC- Proposal Presentation

  9. Mechanical System • X-Y Stage • A mechanical system that allows for fine control of movement • New motors have been coupled to the XY Stage • Sensors need to be installed on the XY Stage to prevent the CNC Machine from hitting the backstops • Sensors will be communicating back to the main PC in realtime

  10. Z-Stage • Z Stage • Built and supports the spindle and motor assembly • Moves vertically and freely at a height of 6” • Is able to support various toolheads • Spindle • Fabricated • Spindle has some play and may need to be adjusted for the final prototype

  11. CNC Toolheads • Spindle • This part will be used for etching and milling • This part has been designed and fabricated • Plastruder • This part is able to melt and regulate the flow of molten plastic • This part can be integrated to transform the CNC Mill/Plotter to a 3D printer Spindle Design Plastruder

  12. Acknowledgements • Prof. JWV Miller • 4983 Professor, and donated XY Stage • Prof. N. Natarajan • 4983 Advisor • Prof. T Kim • Advised on Stepper Motor Control • Prof. Orady • Advised on Spindle design • Jesse Cross • Donated many components • Jeremy Lance • Linux Support • STM and Microchip 3D CNC- Proposal Presentation

  13. Summary • The CNC Mill/Plotter/Etcher will be able to move freely and accurately in 3 Axis • The CNC Machine will be fabricated for less than $500, significantly less than commercial option. • Currently we have ordered $217.26 worth of parts, much less than the $500 • The Spindle for the CNC Machine has been designed and fabricated • Design has been evaluated by Prof. Orady • The motors on the XY stage have been replaced and new motors have been coupled

  14. Questions? Comments? Thank you for your time, Brandon Blott MadhuJosyula

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