Orthotic Insole Milling & EVA Foam CNC Knife Calculator
Calculate ballnose stepover scallop heights, high-speed foam router feeds and speeds, digital oscillating knife stroke frequencies, pedobarographic pressure map isobar depth intervals, and vacuum hold-down requirements for milling custom orthotic blanks and cutting EVA footwear patterns.
1. Insole Geometry & Foam Properties
Standard length (e.g., 260mm for US Men 8, 280mm for US Men 10).
Stepover pitch as % of cutter diameter (10-15% for ultra-smooth orthotic surface).
2. Machining Feeds & Prepress Output
Toolpath Stepover Pitch ($p$):
1.20 mm
Cusp / Scallop Height ($h$):
0.045 mm (45 µm)
Surface Quality Index:
Mirror Smooth (No hand buffing needed)
Recommended Spindle Speed:
18,000 RPM
Milling Feed Rate ($F$):
7,200 mm/min (7.2 m/min)
Chip Load per Tooth ($fz$):
0.20 mm/tooth
Thermal Gumming Risk:
Very Low (Sharp Downcut Shearing)
Oscillating Knife Stroke Frequency:
12,000 strokes/min (200 Hz)
Estimated Milling Time (Pair):
4.8 min
Min. Vacuum Hold-Down Flow:
35 CFM @ -18 inHg
Insole Topography & Isobar Contour Preview
Vectorize Pressure Scans & Footwear Sketches to Clean DXF
Convert 2D pedobarographic scans, sketch profiles, and shoe patterns into smooth, mathematical CAD contours with tangential arc continuity and zero node jitter.
Convert Footwear Vector (29 DKK) →