Introduction: Ellen Price Wood Crust With Fusion 360 and CNC

Well you need ...

A CNC ...

and some pieces of wood. 2 different species. I'll be using Oak tree and Azobe.

And a CNC bit that will process the wood you selected. Azobe if very hard so I need a very hard bit.

And of course Autodesk Fusion 360 (free for hobbyists)

Step 1: Fusion 360 Make a Sketch of Your Crust

First thing first, choice a tool you'll be using to automobile the thing. Should be a flat end mill. Select your diam. This diameter will be crucial in the design. The mill must have enough space to pass in all locations. Design each considering a slightly bigger diameter to allow clearance to glucinium added afterward. I'll be using a classin 1/8 edge in tool but all is designed for 4 millimetre.

First affair is to do a sketch in fusion that will hold your incrustations. See the video.

Important things :

  1. all passages should be large enough for the mill (+clearnce)
  2. everything shoud be rounded so that the tool can mill inside corners. And so in my purpose all is rounded with at least 2 mm radius.

Have fun.

You'll find many videos on the network happening how to use Merger for creating sketeches. I just give you a preview here.

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Step 2: Fusion : Squeeze out the Incrustations

From the sketch I give some thickness to the incrustation with the extrude joyride of Unification 360

Step 3: Create the Meanspirited Component That Will Take for the Incrustations

This step in fusion is a bit more knavish. Following stairs :

  1. make up a plane at the elevation of your incrustations
  2. create a sketch happening that plane
  3. draw the extends of your base component in the sketch
  4. Squeeze out the compoenbase component

See the video...

Step 4: Mix up Bodies to Cut Cavities While Keepin the Incrustations

In this whole step we combine our bodies to cut cavities on the main part while keeping all bodies in place.

Step 5: Compute Cutting Parameters

Present we create a first setup for maching the intense part.

Here are main parameters :

  1. I'll glucinium maching that in a assemble of oak. Let's say rocky wood
  2. I'll be victimisation 1/8 inch matt end mill of basic character with 2 flutes
  3. mandrel rotary motion speed on my CNC is small-scale to 8000 rpm
  4. feed rank on my CNC is limited to 2500 millimeter/minute

Present's all the theory :

https://static1.squarespace.com/static/59efc96d90b...

Thus for strong wood and 1/8 edge John Stuart Mill they recommand 18000 rpm. Too bad that will be 8000 revolutions per minute as the simple machine can't do more.

So they mention a chip load per leading edge between 0.003 an 0.005

Allow's take that to Chip load calculator :

https://gdptooling.com/chipload-calc/

I incu out that with a feed rate of 1.5m/minutes that is 1500 mm/arcminute I pay back an average bit consignment of 0.004.

It your chipload is too low your tool will not have enough material to cut and you get a kind of powder. Your tool volition oestrus, wood will get dark and finally the tool will drop off cutting qualities and faulting.
If chipload is too high, the tool cannot remove enough materail for each pass and bequeath break too.

The set back show you can cut as much as the creature's diameter in depth. I'd start with less tahn that. My start spot in 1 millimeter, possibly 1.5mm depth pet cut As IT's nobelium high quality tool. This also depends on spindle power that is limited to 200W along my machine.

So at long last Hera are the parameters :

  • erect wood (oak tree, will equal the same sor Azobe in the close frame-up)
  • 1/8 end mill
  • maximum spindle speed of 8000 rpm
  • chipload 0.004
  • run over rate 1500 mm/seconds
  • passes of maximum 1mm

Note that with better CNC and joyride I'd double mandrel speed, flow range and die off depth so machining time would Be divided away 4.

Also note that shipload is really low for small diameter tools like this. Every time it's possible I use 6 mm Robert Mills that allow ME tu use max feed order and are confortable with passes of 1.5mm. less risk to break the tool and machining doubly quicker. Again with a faster and much powerful spindle and a CNC that accompaniment faster feed rates I coud improve machinig time aside a factor of minimum 4.

Conclusion : if you wear't have the budget for a professional CNC, machining takes (much) more meter.

Step 6: ​Setup the Machining Operations

Here we prepare the machining operations in Merger 360 and give rise GCode files

Understand the videos

Step 7: Produce !

You've got your GCode ready.

Secure your first stock on the bed of the CNC.

Check Axis jazz are fastend and tight

establis the tool

if your machine does not have limit switches set home position well above with G28.1

Set zero on the top center of your stock and run.

Repeat for the other setup.

Assemble, glue, finish with sandpaper...

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