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8. Computer-Controlled Machining

8.0 Assignments

Task: Computer-Controlled Machining

Group assignment:

  • Complete your lab’s safety training
  • Test runout, alignment, speeds, feeds, and toolpaths for your machine
  • Document your work to the group work page and reflect on your individual page what you learned

Link to this week’s Group Assignment

Individual assignment:

  • Make (design+mill+assemble) something big.

8.0.1 Learning outcome

  • Demonstrate 2D design development for CNC production
  • Describe workflows for CNC production

8.1 Design of a Teeter-Totter (“Subibaja”)

8.1.1 Design process documentation of a large object

8.2 CNC fabrication of a Teeter-Totter (“Subibaja”)

8.2.1 Milling at a large scale

8.2.1.1 CAM-toolpath documentation

8.2.1.2 Documentation of “making something BIG”

8.3 Assemblage of a CNC cut piece

8.4 Problems and solutions

8.5 Final product

Computer Controled Machinging SOP

CNC Test 2022

Important: This procedure is to be performed by 2+ individuals, never one person alone. “The Director” handles the computer and is in charge of giving instructions to the others on what to do. NO ONE ELSE SHOULD INTERACT WITH THE COMPUTER

Start the machine with the ‘on’ button on the start switch Find digital locators by pressing the ‘Home Button’ of the UI of the Kinetic-NC main screen If a piece of material has been left on the sacrifice board, proceed to remove all screws and vacuuming the area Locate “CNC Test 22” files on the cloud Measure new material in the area where it will be cut, if an already used piece is still laying on the surface. If a new one is to be laid, measure all four corners to find the average size Position the board in a way it is easy to use up close to the edge First set of (4 screws) ought to be placed on a 20mm frame around the board piece and one around the centre Note: Screws need to be put fully in, taken out one third before being fully tightened. Remove dust shoot by opening the collet chuck and ensuring the collet is the right size in relation to the flute. (In this specific case a Downcut one edge (flute) spiral 6mm Shank Rh made out of solid carbide Z1). Place dust shoot back by fitting the collet into the collet chuck and screwing in until some resistance is felt. Install the flute inside the collet finding the right depth by holding with thumb and index fingers at the very end of the flute. When fitting the dust shoot, ensure that it aligns with the collet chuck. Fit the exhaust adapter back in place. Calibrate the machine on Z by beginning with Y & X (each one from their view) and by placing the magnetic button under the flute. On the Kinetic-NC main screen click on the “Custom” button and on Z0 finder with the ‘mobile tool length probe’. The ‘Abortion’ button can be used in order to restart the procedure, if needed. *in 90% of machines, the long axis is the ‘x axis’ Before launching the file reset the spindle and feed values — to keep them from overriding currently existing code values. Open file by clicking on “File” tab, and open MNC file. Check the first 10 lines of G-Code G90 - absolute G64 - to cancel, exact stop M7 - disable lubrication and spindle M8 - disable T1 - choose tool 1 M3 - motor command - to switch on […] M9 - disable M15 - disable

General recommendations before starting: BEFORE RUNNING ANYTHING, MAKE SURE YOU ARE WEARING SAFETY GLASSES!! - During standby periods of time, change screens in order to avoid accidental interactions with the computer that could affect the performance of the machine. - During the process navigate the code with the existing buttons from the ribbon at the top of the code. - The mouse should be located on the STOP button at all times while the machine is in function. Information about time estimation left and position on the code is located at the bottom right of the interface’s UI. - The code can be “hot edited” while the machine is in function. This is equivalent to opening the test editor and changing the file in the computer. Press play on the machine After running the machine and once it has stopped working, move the machine out with the ‘arrow side & up button’. Add screws and check once again the position of ‘Z’. Calibrate again if needed. Find Z0 point Repeat steps 13 to 16 keeping in mind the given recommendations. Stop the machine and proceed to touch the collet and end mill to test if it is cold. If yes, it means it’s working well.

yashika spindle 2.2 kw

18000-24000rpm 12000-22000rpm

when choosing the right gauge between machine, end mill, material, settings and project requires to start rather slow

depending on the strength of the machine you reach a different speed rate feed rate variates based on the type of project as a general rule, cut slower but deeper. the change in speed based on the project increases exponentially, therefore we must keep in mind the variables

1 Flute Down 38000 / 1 (21.000) = 0,18

CNC calibrating is a job: values, manufacturer, material, etc

Important elements: accelerations Post Processor compatible to our machine NC-Easy in Aspire each machine reads different g-code M3 and M5 are the same instruction but for different machines guideline of rules for each machine size speed

in Rhino, Eduardo starts by defining size of material Draws Curve tools, raws a curved shape (inside in cut (blue), outside out cut (red) and the curved one is on the line (green) RhinoCAM2018 CNC_STEP_BCN found on the class repo is in Eduardos GitHub (copy the file in your hard drive if you want to have it)

Machine - 3 Axis Post - CNC_STEP_BCN Material Stock - Box Stock Setup

Vertical speed is called plunge (z) horizontal is feed (x,y)

Research

“Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.”

“Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.”

Yanka Rating

Current inventory of material to be used at Fab Academy Barcelona

  • 96 inch x 48 inch = 2440x1220mm

  • 2500x1250mm

  • 9mm birch plywood

  • 12mm pine plywood b

  • 15mm pine plywood c

  • 18mm ldpe recycled plastic panel

Recomended softwares for Computer Controlled Machinging:

  • Easel software
  • Aspire Vectric CAM software
  • CAM on Grashopper
  • Rhino CAM
  • Fusion 360

Inspirational

Adrien Laveu - Fab Academy with a Raspberrry Pi

Teeter-Totter Janka Rating

Week 08 - Computer-Controlled Machining

Nomadic Furniture p93 Two Teeter Totters for Small Children file:///Users/ximenaamador/Downloads/James%20Hennessey,%20Victor%20Papanek%20-%20Nomadic%20Furniture%202-Pantheon%20Books%20(1974).pdf

Easel https://easel.inventables.com/projects/j1XxdpCk_s3dyoHW1C7eIg#

96 inch x 48 inch = 2440x1220mm 2500x1250mm

9mm birch plywood 12mm pine plywood b

15mm pine plywood c

18mm ldpe recycled plastic panel

Aspire Vectric CAM software CAM on Grashopper Rhino CAM Fusion 360

Adrien Laveu - Fab Academy with a Raspberrry Pi

https://www.cmtorangetools.com/es-es/fresas-industriales-para-fresadoras

yanka charts wood https://i.pinimg.com/originals/da/38/12/da381259a4f4d657b56219d82e9f2bed.jpg

Ximena: Revisa el catálogo de end mills del FabAcadBCN en Google docs haz una lista de favorite bookmarks -instala Rhino en tu computadora -documenta con el video de Eduardo (clase jueves)

yashika spindle 2.2 kw

18000-24000rpm 12000-22000rpm

broncesval.com (aluminio)

http://www.cnczone.com/forums/uncategrised-metalworking-machines

when choosing the right gauge between machine, end mill, material, settings and project requires to start slow

depending on the strength of the machine you reach a different speed rate feed rate variates based on the type of project as a general rule, cut slower but deeper. the change in speed based on the project increases exponentially, therefore we must keep in mind the variables

1 Flute Down 38000 / 1 (21.000) = 0,18

CNC calibrating is a job: values, manufacturer, material, etc

Important elements: accelerations Post Processor compatible to our machine NC-Easy in Aspire each machine reads different g-code M3 and M5 are the same instruction but for different machines guideline of rules for each machine size speed

in Rhino, Eduardo starts by defining size of material Draws Curve tools, raws a curved shape (inside in cut (blue), outside out cut (red) and the curved one is on the line (green) RhinoCAM2018 CNC_STEP_BCN found on the class repo is in Eduardos GitHub (copy the file in your hard drive if you want to have it)

Machine - 3 Axis Post - CNC_STEP_BCN Material Stock - Box Stock Setup

Vertical speed is called plunge (z) horizontal is feed (x,y)

Computer Controled Machinging SOP

CNC Test 2022

Important: This procedure is to be performed by 2+ individuals, never one person alone. “The Director” handles the computer and is in charge of giving instructions to the others on what to do. NO ONE ELSE SHOULD INTERACT WITH THE COMPUTER

Start the machine with the ‘on’ button on the start switch Find digital locators by pressing the ‘Home Button’ of the UI of the Kinetic-NC main screen If a piece of material has been left on the sacrifice board, proceed to remove all screws and vacuuming the area Locate “CNC Test 22” files on the cloud Measure new material in the area where it will be cut, if an already used piece is still laying on the surface. If a new one is to be laid, measure all four corners to find the average size Position the board in a way it is easy to use up close to the edge First set of (4 screws) ought to be placed on a 20mm frame around the board piece and one around the centre Note: Screws need to be put fully in, taken out one third before being fully tightened. Remove dust shoot by opening the collet chuck and ensuring the collet is the right size in relation to the flute. (In this specific case a Downcut one edge (flute) spiral 6mm Shank Rh made out of solid carbide Z1). Place dust shoot back by fitting the collet into the collet chuck and screwing in until some resistance is felt. Install the flute inside the collet finding the right depth by holding with thumb and index fingers at the very end of the flute. When fitting the dust shoot, ensure that it aligns with the collet chuck. Fit the exhaust adapter back in place. Calibrate the machine on Z by beginning with Y & X (each one from their view) and by placing the magnetic button under the flute. On the Kinetic-NC main screen click on the “Custom” button and on Z0 finder with the ‘mobile tool length probe’. The ‘Abortion’ button can be used in order to restart the procedure, if needed. *in 90% of machines, the long axis is the ‘x axis’ Before launching the file reset the spindle and feed values — to keep them from overriding currently existing code values. Open file by clicking on “File” tab, and open MNC file. Check the first 10 lines of G-Code G90 - absolute G64 - to cancel, exact stop M7 - disable lubrication and spindle M8 - disable T1 - choose tool 1 M3 - motor command - to switch on […] M9 - disable M15 - disable

General recommendations before starting: BEFORE RUNNING ANYTHING, MAKE SURE YOU ARE WEARING SAFETY GLASSES!! - During standby periods of time, change screens in order to avoid accidental interactions with the computer that could affect the performance of the machine. - During the process navigate the code with the existing buttons from the ribbon at the top of the code. - The mouse should be located on the STOP button at all times while the machine is in function. Information about time estimation left and position on the code is located at the bottom right of the interface’s UI. - The code can be “hot edited” while the machine is in function. This is equivalent to opening the test editor and changing the file in the computer. Press play on the machine After running the machine and once it has stopped working, move the machine out with the ‘arrow side & up button’. Add screws and check once again the position of ‘Z’. Calibrate again if needed. Find Z0 point Repeat steps 13 to 16 keeping in mind the given recommendations. Stop the machine and proceed to touch the collet and end mill to test if it is cold. If yes, it means it’s working well.

yashika spindle 2.2 kw

18000-24000rpm 12000-22000rpm

when choosing the right gauge between machine, end mill, material, settings and project requires to start rather slow

depending on the strength of the machine you reach a different speed rate feed rate variates based on the type of project as a general rule, cut slower but deeper. the change in speed based on the project increases exponentially, therefore we must keep in mind the variables

1 Flute Down 38000 / 1 (21.000) = 0,18

CNC calibrating is a job: values, manufacturer, material, etc

Important elements: accelerations Post Processor compatible to our machine NC-Easy in Aspire each machine reads different g-code M3 and M5 are the same instruction but for different machines guideline of rules for each machine size speed

in Rhino, Eduardo starts by defining size of material Draws Curve tools, raws a curved shape (inside in cut (blue), outside out cut (red) and the curved one is on the line (green) RhinoCAM2018 CNC_STEP_BCN found on the class repo is in Eduardos GitHub (copy the file in your hard drive if you want to have it)

Machine - 3 Axis Post - CNC_STEP_BCN Material Stock - Box Stock Setup

Vertical speed is called plunge (z) horizontal is feed (x,y)

Research

“Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.”

“Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.”

Yanka Rating

Current inventory of material to be used at Fab Academy Barcelona

  • 96 inch x 48 inch = 2440x1220mm

  • 2500x1250mm

  • 9mm birch plywood

  • 12mm pine plywood b

  • 15mm pine plywood c

  • 18mm ldpe recycled plastic panel

Recomended softwares for Computer Controlled Machinging:

  • Easel software
  • Aspire Vectric CAM software
  • CAM on Grashopper
  • Rhino CAM
  • Fusion 360

Inspirational

Adrien Laveu - Fab Academy with a Raspberrry Pi

Teeter-Totter Janka Rating

Last update: October 5, 2023