[Farzaneh_2010]

hello
i have a question.In G02 and G03 if we have R value and need to find the point of circle.what do we do? i saw a formul in this site but it did not work correctly
and i use some formul but i did not an answer.please help...it is very important for me

[Farzaneh_2010]

hello
please ask my question.how can i find center when i have two points and radius
in Gcode (G02 and G03) how do i do when i do not have I and J value?
Please help

[holbieone]

you can find sites that teach math with a Google search

[Farzaneh_2010]

thank you
but i explain that i searched and studid many days but i can not find a correct result.if you know site please tell me

[ger21]

Math Forum - Ask Dr. Math

[jeffrey001]

Machine Shop Info

This guy offers good video tutorial, really helpful.


Jeff

[Medm]

Here is a link to a web site that has the information that you seek.

Equation of a circle in standard form. How to express a circle with given radius in standard form...

I hope that this is what you are looking for.

[Farzaneh_2010]

Math Forum - Ask Dr. Math

thank you
but this formul is not correct. It did not calculate center point correctly.I tested
many foumul but all of them were wrong.

[Farzaneh_2010]

Here is a link to a web site that has the information that you seek.

Equation of a circle in standard form. How to express a circle with given radius in standard form...

I hope that this is what you are looking for.

thank you
but this address is error.I can not see this site.could you that formul mail me?

[sinha_nsit]

After you make a circle using R-method, why do you need its center. Pl explain.
I can work out the formula for you, but why devote time on something not very important!
Pl explain your requirement first.

[Farzaneh_2010]

After you make a circle using R-method, why do you need its center. Pl explain.
I can work out the formula for you, but why devote time on something not very important!
Pl explain your requirement first.

hello and thanks
what do we need for draw a circle?R and center coordinate.so I need to know what is center points.you tell me G02 or G03 draw circle but where does draw it?start point end point Radius and center points are need.if I thinking wrong please guide me.
sorry my english is weak so I wrote sth wrong.

[sinha_nsit]

You need to specify either R or IJK, not both.
If you specify both, the control uses R-method, ignoring IJK.
Positive R produces minor arc (which is relevant in most cases), and negative R produces major arc.
The manual does not recommend R-method when the chord angle is close to 180 degree.

[holbieone]

You need to specify either R or IJK, not both.
If you specify both, the control uses R-method, ignoring IJK.
Positive R produces minor arc (which is relevant in most cases), and negative R produces major arc.
The manual does not recommend R-method when the chord angle is close to 180 degree.

i think he is trying to write a program that plots out the tool path

[Farzaneh_2010]

thank you very much.
you are right.I think I need R and J,I.So now found it is not necessary.thanks

[angelw]

thank you very much.
you are right.I think I need R and J,I.So now found it is not necessary.thanks

Are you wanting this information for use with Circular Interpolation in a CNC program, or are you trying to write a program to plot the tool path of a CNC program? If you are trying to write the software to plot the tool path, I can give you the routine to calculate the circle center when given two points and a radius. If that is what you require, please reply and I will post the code and an explanation on how to implement it.

Regards,

Bill