How to do this

Harry H. Arends wrote:

I know how to make a round board but our enginering departement asked me

to produce a disk like the one in this drawing:

http://www.time-tech.eu/Detector_Wheel.pdf

 

Could someone tell me how to do this?

 

Thanks

 

Harry

Hi Harry,

This is somewhat time consuming but below are the steps that I use for

creating a circular board with a circular pattern of holes.

1. Start your circle at the orgin.

2. Use the circle command to draw your circle: e.g.

Example

GRID inch 1;

CIRCLE (0 0) (1 0);

generates a circle with a radius of 1 inch and the center at the origin.

3. Repeat step 2 for your inner circle: e.g.

Example

GRID inch 1;

CIRCLE (0 0) (.75 0);

generates a circle with a radius of .75 inch and the center at the origin.

4. Using mark command mark the origin.

Example

MARK (0 0)

5. Now the tricky part. Again using the mark command with polar

coordinates mark the first smaller circle.

Example

MARK (P.75 0)

6. Use the circle command (Polar coordintates) to draw your circle: e.g.

Example

GRID inch 1;

CIRCLE (P0 0) (.025 P0)

generates a circle with a radius of .025 inch and the center at the

origin (relative to mark).

To place the next hole.

7.Repeat step 4, Using mark command mark the origin.

Example

MARK (0 0)

8. Repeat step 5, (However use next angle position) Again using the mark

command with polar coordinates mark the first smaller circle.

Example

MARK (P.75 7.5)  Note: The hole rotation will be counter-clockwise.

9. Repeat step 6, Use the circle command (Polar coordintates) to draw

your circle: e.g.

Example

GRID inch 1;

CIRCLE (P0 0) (.025 P0)

generates a circle with a radius of .025 inch and the center at the

origin (relative to mark).

10. Repeat steps 4, 5, 6 adding the required angle delta (in your case

7.5 degrees) to complete the hole pattern.

I hope this helps. If anyone else has a better way please post.

Cheers

Eagle User

Harry H. Arends wrote:

I know how to make a round board but our enginering departement asked me

to produce a disk like the one in this drawing:

http://www.time-tech.eu/Detector_Wheel.pdf

 

Could someone tell me how to do this?

 

Thanks

 

Harry

Hi Harry,

This is somewhat time consuming but below are the steps that I use for

creating a circular board with a circular pattern of holes.

1. Start your circle at the orgin.

2. Use the circle command to draw your circle: e.g.

Example

GRID inch 1;

CIRCLE (0 0) (1 0);

generates a circle with a radius of 1 inch and the center at the origin.

3. Repeat step 2 for your inner circle: e.g.

Example

GRID inch 1;

CIRCLE (0 0) (.75 0);

generates a circle with a radius of .75 inch and the center at the origin.

4. Using mark command mark the origin.

Example

MARK (0 0)

5. Now the tricky part. Again using the mark command with polar

coordinates mark the first smaller circle.

Example

MARK (P.75 0)

6. Use the circle command (Polar coordintates) to draw your circle: e.g.

Example

GRID inch 1;

CIRCLE (P0 0) (.025 P0)

generates a circle with a radius of .025 inch and the center at the

origin (relative to mark).

To place the next hole.

7.Repeat step 4, Using mark command mark the origin.

Example

MARK (0 0)

8. Repeat step 5, (However use next angle position) Again using the mark

command with polar coordinates mark the first smaller circle.

Example

MARK (P.75 7.5)  Note: The hole rotation will be counter-clockwise.

9. Repeat step 6, Use the circle command (Polar coordintates) to draw

your circle: e.g.

Example

GRID inch 1;

CIRCLE (P0 0) (.025 P0)

generates a circle with a radius of .025 inch and the center at the

origin (relative to mark).

10. Repeat steps 4, 5, 6 adding the required angle delta (in your case

7.5 degrees) to complete the hole pattern.

I hope this helps. If anyone else has a better way please post.

Cheers

Eagle User