Arc: Tangent, Tangent, Through Point

[drafting3]

So, I can't seem to find a function in Mastercam that lets me create an arc that is tangent to two entities, and runs through a point. Obviously, you would not need to supply a center or radius for the arc since all the required information is provided by the selected geometry.

 

I'm sure I could just google the formula, but I'm taking some math classes right now and feel like challenge myself, so I'm going to figure it out on my own. I'll probably write an add-on for mastercam once I'm done.

 

Has this feature been added since X2? Would anyone else be interested in having this function?

[K2csq7]

Do you have a screenshot?

[drafting3]

Yellow entities define the geometry of the arc i want, which is shown in red.

 

 

the arc should be tangent to the line, the reference arc, and then run through the point i'm showing.

 

 

what i'm showing is accurate within a tenth, but it's not dead-on. also, it took a little time to keep redrawing it until i got it right.

[drafting3]

oops

[K2csq7]

create

arc

arc 3 points

click the point first (can be anything autocursor snaps to, i.e. endpoint, midpoint, intersection.....), then the tangent icon on the ribbon bar that popped up, then click the other 2 entities you want the new arc to be tangent to.

[Colin Gilchrist]

You can also do tangent to an entity, through two points with the 3 point arc, just pick your two points first before enabling the tangent option.

[drafting3]

create

arc

arc 3 points

click the point first (can be anything autocursor snaps to, i.e. endpoint, midpoint, intersection.....), then the tangent icon on the ribbon bar that popped up, then click the other 2 entities you want the new arc to be tangent to.

 

you're on fire! exactly what i needed.

 

thanks

[K2csq7]