The Method in Artcam

Below are the different stages for generating the toolpaths for the forms in Artcam. Click on any of the images to enlarge.

Start with the size of the material block you will be machine out of

img_20170301_121138

Import the 3D model

img_20170301_121153

Centre the model in the material

img_20170301_121213

Rotate the model along the X and Y axis until the model lies flat

img_20170301_121256

Work out the different between material block height and model height

img_20170301_122346

Divide this by two

img_20170301_122407

Move the model by this amount along the Z axis

img_20170301_121355

Paste down the model down on the first relief layer

img_20170301_121403

Switch to the other relief layer, rotate the model by 180 degrees and then paste this down

img_20170301_121420

Create a boundary vector from the edge of the form

img_20170301_121438

Offset this vector by half the tool size, 6mm in this case

img_20170301_121448

Create a new 2D path along this vector

img_20170301_121507

Put in the desired settings for the CNC to run at into the toolpath. The setting I used for this were;

Stepover 6
Stepdown 25
Feed rate 3
Final pass feed rate 8
Plunge rate 7
Spindle speed 16000
Tool number 1

img_20170301_121529

Edit the bridges, manually editing where they are positioned and setting their width and height

img_20170301_121652

Set up the material block sized making sure that the material Z zero is at the bottom of the block and the offset of the model inside the block is at the top

img_20170301_121808

Generate the toolpath and check it looks right

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Create a new 3D toolpath on one of the layers

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Set the desired setting for the tool to run at for both the roughing of the form and then the finishing making sure that you contain the toolpath within the boundary vector. The setting I used for these toolpaths were as below;

Roughing-

Stepover5 5
Stepdown 25
Feed rate 5
Final pass feed rate 8
Plunge rate 7
Spindle speed 16000
Tool number 1

Finishing-

Stepover 0.5
Stepdown 25
Feed rate 4
Final pass feed rate 8
Plunge rate 7
Spindle speed 16000
Tool number 1

img_20170301_122742

Generate this toolpath and check it looks right

img_20170301_122816img_20170301_122837

Click the other layer and repeat this with the desired setting. I kept the setting the same for the front and back relief

img_20170301_122927img_20170301_122930

Save the toolpaths and send them to the machine and you are ready to go!

Below is a Video showing this process-

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