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" <info@time-tech.eu> wrote in message

news:gped9j$21i$1@cheetah.cadsoft.de...

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

You only need to calculate ONE hole for this. Work at 3, 6, 9, or 12

o'clock. Lets say you're at 6:00... .

Draw the circular board outline with the origin as center. Draw your first

hole at 6:00.

Copy the hole and place the copy outside the circle, (use a coarse grid if

you can).

Group the board, rotate it by 7.5 degrees, then copy the hole copy back to

the 6:00 position.

Group the board, rotate...

(To rotate the PCB: group the entire PCB, click the move icon, RIGHT click

the group AT THE ORIGIN, type 7.5 in the angle box, ENTER, LEFT click the

ORIGIN. The board should have rotated 7.5 degrees. You might want to make an

index mark at some point on the board before you start, that's up to you.

It would get more complicated if you had to do oddball angles, (maybe,

360/7?) but you could work with some multiple of the base angle - depending

on your allowable error.

Since the total number of holes is divisible by four, you can probably do a

group copy once you're 1/4 the way done, then once again for the second

half. Simply eyeball the placement. You will have extra board outlines on

top of the original that should be removed.

oww, dizzy -gottaa go

Can you not make a DXF form your drawing and import to eagle?

OK you must perhaps set holes manuel.

Thierry

"Brett Holden" <brettholden@bellsouth.net> skrev i melding

news:gpf3m0$imc$1@cheetah.cadsoft.de...

 

"Harry H. Arends" <info@time-tech.eu> wrote in message

news:gped9j$21i$1@cheetah.cadsoft.de...

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

 

You only need to calculate ONE hole for this. Work at 3, 6, 9, or 12

o'clock. Lets say you're at 6:00... .

 

Draw the circular board outline with the origin as center. Draw your first

hole at 6:00.

Copy the hole and place the copy outside the circle, (use a coarse grid if

you can).

 

Group the board, rotate it by 7.5 degrees, then copy the hole copy back to

the 6:00 position.

 

Group the board, rotate...

 

(To rotate the PCB: group the entire PCB, click the move icon, RIGHT click

the group AT THE ORIGIN, type 7.5 in the angle box, ENTER, LEFT click the

ORIGIN. The board should have rotated 7.5 degrees. You might want to make

an index mark at some point on the board before you start, that's up to

you.

 

It would get more complicated if you had to do oddball angles, (maybe,

360/7?) but you could work with some multiple of the base angle -

depending on your allowable error.

 

Since the total number of holes is divisible by four, you can probably do

a group copy once you're 1/4 the way done, then once again for the second

half. Simply eyeball the placement. You will have extra board outlines on

top of the original that should be removed.

 

oww, dizzy -gottaa go

 

 

I think you will have to use a script. Create a circle in the

dimension layer with a wire of 0 and the correct diameter and arc.

Then for each of the slots specify the exact co-ordinates of the

squares/slots on a circle inset from the outer edge, then rotate each

slot in polar co-ordinates

On Fri, 13 Mar 2009 20:50:14 +0100, "Harry H. Arends"

<info@time-tech.eu> 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

Sorry for the late answer but i have been in hospital for some weeks.

The problem doenst lies in the holes but the notches in the outer rim.

Harry

"Robert Lewis" <robert.lewis@iMnMicroControl.com> schreef in bericht

news:4fnsr4dcba9hol6fn18oapshl59e79ona0@4ax.com...

I think you will have to use a script. Create a circle in the

dimension layer with a wire of 0 and the correct diameter and arc.

 

Then for each of the slots specify the exact co-ordinates of the

squares/slots on a circle inset from the outer edge, then rotate each

slot in polar co-ordinates

 

On Fri, 13 Mar 2009 20:50:14 +0100, "Harry H. Arends"

<info@time-tech.eu> 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

How can i import a dxf drawing into eagle

"Thierry Pottier" <tp@tpelectronics.no> schreef in bericht

news:gpihd2$8nv$1@cheetah.cadsoft.de...

Can you not make a DXF form your drawing and import to eagle?

OK you must perhaps set holes manuel.

Thierry

 

"Brett Holden" <brettholden@bellsouth.net> skrev i melding

news:gpf3m0$imc$1@cheetah.cadsoft.de...

 

"Harry H. Arends" <info@time-tech.eu> wrote in message

news:gped9j$21i$1@cheetah.cadsoft.de...

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

 

You only need to calculate ONE hole for this. Work at 3, 6, 9, or 12

o'clock. Lets say you're at 6:00... .

 

Draw the circular board outline with the origin as center. Draw your

first hole at 6:00.

Copy the hole and place the copy outside the circle, (use a coarse grid

if you can).

 

Group the board, rotate it by 7.5 degrees, then copy the hole copy back

to the 6:00 position.

 

Group the board, rotate...

 

(To rotate the PCB: group the entire PCB, click the move icon, RIGHT

click the group AT THE ORIGIN, type 7.5 in the angle box, ENTER, LEFT

click the ORIGIN. The board should have rotated 7.5 degrees. You might

want to make an index mark at some point on the board before you start,

that's up to you.

 

It would get more complicated if you had to do oddball angles, (maybe,

360/7?) but you could work with some multiple of the base angle -

depending on your allowable error.

 

Since the total number of holes is divisible by four, you can probably do

a group copy once you're 1/4 the way done, then once again for the second

half. Simply eyeball the placement. You will have extra board outlines on

top of the original that should be removed.

 

oww, dizzy -gottaa go

 

 

Harry H. Arends schrieb:

How can i import a dxf drawing into eagle

Take a look at the Download area, Misc folder.

There are two or three tools that allow to convert DXF into EAGLE

script format. Simply search for "dxf" with the search function

of your browser.

--

Mit freundlichen Gruessen / Best regards

Richard Hammerl

CadSoft Support -- hotline@cadsoft.de

FAQ: http://www.cadsoft.de/faq.htm

On Wed, 20 May 2009, Richard Hammerl wrote to us saying :

Harry H. Arends schrieb:

How can i import a dxf drawing into eagle

 

Take a look at the Download area, Misc folder.

There are two or three tools that allow to convert DXF into EAGLE

script format. Simply search for "dxf" with the search function

of your browser.

 

Bear in mind, though, that the DXF format is a very loose standard and

the import tools have limitations on which object types they cope with.

When I tried it on a logo design, the tools all achieved exactly the

same result - nothing.

--

Rob Pearce                       http://www.bdt-home.demon.co.uk

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