This can then be sent to your CNC machine and a hole drilled in the centre for the clock mechanism
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Opening the Image
Drag the image above into ArtCAM and set the size as you wish (I used 450mm x 450mm)
Step 2: Trace Around the Image
To do this, select the Bitmap to Vector tool. Reduce the colours down to two so it just has black and white. Make sure black is the selected colour and create vectors. You can use the default settings for it
Delete the clock hand vectors as the clock hands will be a seperate piece purchased from any hardware store
Step 3: Creating Toolpaths for Machining
Create an Area Clearance using inner circle and four circles. The tool and settings below are what I have used, you can change these if you wish
Using a 12mm End Mill and a 3mm End Mill
Finish depth 3mm
Material is 25mm
Create a Profile cut on all vectors except for the circles above using a 3mm End Mill
Tip - If you dont want the waste pieces to fly from the machine, use bridges to leave some material which will keep it attached to the main piece, these then need to be snapped off once finished
Simulate this to check for errors and then save the toolpaths using your CNC found in the machine file format list