Weekly Assignments Final Project About me

7. Computer-controlled machining

Group assignment:

Link

Safety training

What I learned in this week’s safety training was similar to the laser cutting training: you must always stay alert for any emergency in order to stop the machine if necessary. In addition, when you are working in the CNC area, you must wear special safety equipment: safety boots and a lab coat or coveralls. Personally, I also wore a face mask, safety glasses, and hearing protection.

CNC cutting

Slide to find out how i did this:

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CNC cutting

First I did a sketch of what i wanted my weekly proyect to be.

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CNC cutting

Then I did a 3d model in solidworks.

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CNC cutting

I exported it a dxf and arranged it in AutoCad.

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CNC cutting

Open your file in VCarve. File → Import

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How to use the router:

Open the drawing options here.

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How to use the router:

Select the object type – we will use single sided. Then set the size of your material. In this case, since it was plywood, it was 2440 mm × 1220 mm.

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How to use the router:

Add dog bones: modifications to the corners so the joints fit together (for assemblies). Fillet → Dogbones → select the type you want.

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How to use the router:

Change the dogbone radius: Minimum separation should be 3 times the cutter diameter.

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How to use the router:

Create the toolpath

Change the cutting depths Add 0.5 mm to 1 mm more than the thickness of the material.

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How to use the router:

Select the cutter:

  • End Mill ¼” – specified by the manufacturer.
  • Chip load: amount of material the cutter removes per revolution
  • Speed: between 16000–18000
  • Feed rate: 2500 mm/min
  • Plunge rate: 600 mm/min (speed at which the cutter enters the material)
  • Cut depth: half of the cutter diameter (0.1 is fine).
  • Stepover: how close the toolpaths will be to each other (important if you are making pockets).
  • Inside the tool settings, add the passes (you can change it to 5 passes).

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How to use the router:

Choose where the cut will be made (Outside the line, Inside the line or On the line) And put the tabs: Material left so the piece does not fly off: 5 mm length × 4 mm thickness

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How to use the router:

Label the cuts: Change the order of the toolpaths if necessary (pocketing goes first).

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How to use the router:

Arrange thr order of the cuts.

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How to use the router:

Save the toolpath

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How to use the router:

Mach ⅔ arcs mm – for the red machine → .txt Asia Robótica nk75.3 arcs – for the black machine → .enc

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How to use the router:

Open the app AR2400 and import your file. To be able to move the router be sure that the emergency stop is off.

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How to use the router:

Here is the final cutting result.

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