Goal:
Demonstrate the surface finish achievable when manufacturing a Freeform Augmented Reality Lens Mold by Slow Tool Servo (STS) on a Freeform® L.
Process:
Freeform XZC diamond turning
Part Details:
• Material: Nickel plated steel
• Part dimensions: 26.68 mm x 26.88 mm
Process Details:
• Tool: Single point diamond tool
• Tool Radius: 0.76 mm
• Spindle speed: 70 rpm
• Feed rate: 5 µm/rev
• Finish pass depth of cut: 2 µm
• Coolant: Odorless mineral spirits (OMS)
Setup Photo
Part Photo
Results:
• Surface finish near center: 1.35 nm Ra
• Surface finish near edge: 0.872 nm Ra
Sample 1 - near center
Sample 2 - outside edge
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