### Author Topic: Creating GCode to cut a solar dish mold.  (Read 2178 times)

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#### Pythagoras

• Active Member
• Posts: 83
• a² + b² = c²
##### Creating GCode to cut a solar dish mold.
« on: July 22, 2010, 09:29:28 PM »
If I wanted to make a mold for a 1 x 1 metre square reflective solar dish, and the focalpoint was to be 3metres away, how would I go about it?
How would I then ceate code to then cut this mold via 3 axis CNC.

Regards Benny
The Pythagorean theorem: The sum of the areas of the two squares on the legs (a and b) equals the area of the square on the hypotenuse (c).     a² + b² = c².

#### Pythagoras

• Active Member
• Posts: 83
• a² + b² = c²
##### Re: Creating GCode to cut a solar dish mold.
« Reply #1 on: July 22, 2010, 10:37:11 PM »
The Pythagorean theorem: The sum of the areas of the two squares on the legs (a and b) equals the area of the square on the hypotenuse (c).     a² + b² = c².

#### kf2qd

• Active Member
• Posts: 123
##### Re: Creating GCode to cut a solar dish mold.
« Reply #2 on: July 23, 2010, 04:17:52 PM »
Actually it isn't that hard - you would basically cut a bumch of circles with the z calculated off the radius to give you the right focal length. Don't have to be too picky witht he roughing cuts, but you would need to keep the radius changed small for th finish cuts. A ball nosed endmill (the larger the better for finishing)