Tutorial Intermediate ⏱ 15 minutes

Mounting Plate

Create a complete mounting plate with chamfered corners, central clearance hole, and four corner bolt holes — a standard engineering component.

What You Will Build

A 100×80mm mounting plate with 10mm chamfers, 25mm central clearance hole, and four M6 corner bolt holes on 80×60mm bolt pattern.

Operators Used

Rectangle/TL,BR Chamfer/Between,L,L Circle/Centre,R Points/On,C,N

Create the Plate Outline

Create the rectangular plate outline.

Point/0, 0, 0    → P0
Point/100, 80, 0 → P1

Rectangle/P0, P1
   Quick Input: P: 0  P2: 1
→ L0: bottom  (0,0)→(100,0)
→ L1: right   (100,0)→(100,80)
→ L2: top     (100,80)→(0,80)
→ L3: left    (0,80)→(0,0)

Plate: 100×80mm

Add Chamfers to All Four Corners

Create 10mm chamfers at all four corners.

Chamfer/Between, L3, L0, D1=10, D2=10  → L4  [bottom-left]
Chamfer/Between, L0, L1, D1=10, D2=10  → L5  [bottom-right]
Chamfer/Between, L1, L2, D1=10, D2=10  → L6  [top-right]
Chamfer/Between, L2, L3, D1=10, D2=10  → L7  [top-left]

Trim all corners (8 trim operations)

Create the Central Clearance Hole

Create a 25mm diameter clearance hole at the plate centre.

P_centre = (50, 40)  [plate centre]

Circle/Centre, P_centre, R=12.5, 0
→ C0: central clearance hole
   Diameter = 25mm

Create the Four Corner Bolt Holes

Place M6 clearance holes at the four corners of the bolt pattern. The bolt pattern is 80×60mm centred on the plate.

Bolt pattern: 80×60mm centred at (50,40)
  Corner positions:
  P0 = (50-40, 40-30) = (10, 10)  [bottom-left]
  P1 = (50+40, 40-30) = (90, 10)  [bottom-right]
  P2 = (50+40, 40+30) = (90, 70)  [top-right]
  P3 = (50-40, 40+30) = (10, 70)  [top-left]

Circle/Centre, P0, R=3.3, 0  → C1  [M6 clearance = 6.6mm dia]
Circle/Centre, P1, R=3.3, 0  → C2
Circle/Centre, P2, R=3.3, 0  → C3
Circle/Centre, P3, R=3.3, 0  → C4

Verify All Dimensions

Check all critical dimensions before CAM setup.

Plate size: 100×80mm ✓
Chamfer: 10mm × 10mm ✓
Central hole: 25mm diameter ✓
Bolt pattern: 80×60mm ✓
Bolt holes: 6.6mm diameter (M6 clearance) ✓

Measure → Distance
Click C1 centre, Click C2 centre
→ Horizontal spacing: 80mm ✓

Click C1 centre, Click C3 centre
→ Diagonal spacing: sqrt(80^2+60^2) = 100mm ✓