Auto-place, or at least "semi-automatic"

Joerg wrote on Wed, 26 November 2014 20:02

When switching to board view for the first time let Eagle scatter the

components the same way they are on the schematic, with multiple pages

in sub-groups.

I don't see any point to this.  The initial placement outside the board

area is irrelevant, so  code to arrange it any particular way would be a

waste of effort.

Auto-placement algorithms don't really work with current technology.

You're going to place every component manually anyway.  It doesn't matter

where it comes from outside the board area when you bring it into the board

area to place it.  You would typically be zoomed in to the area of the

board you are working on, or at least zoomed to just the board if the board

is small.  Parts you bring in to place will come from off screen someplace

no matter how they are arranged out there.  It makes no difference where

off screen that is.

This is one of the few tasks where a paper printout is still useful.  After

finishing the schematic, I print it out and put it on my desk.  As parts

are placed, they are crossed off in the schematic.  When everything on a

sheet is placed, the legend in the lower right corner is crossed off.  This

process continues until everything is crossed off, meaning all parts have

been placed.  Note that nowhere in this process does it matter at all where

the unplaced parts are, as long as they aren't on the board.

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Olin Lathrop wrote:

Joerg wrote on Wed, 26 November 2014 20:02

When switching to board view for the first time let Eagle scatter the

components the same way they are on the schematic, with multiple pages

in sub-groups.

 

I don't see any point to this.  The initial placement outside the board

area is irrelevant, so  code to arrange it any particular way would be a

waste of effort.

 

Not at all, it will make it much easier to find stuff.

Auto-placement algorithms don't really work with current technology.

So why do even lower cost CAD programs such as Diptrace have it and

people use it?

You're going to place every component manually anyway.  It doesn't matter

where it comes from outside the board area when you bring it into the board

area to place it.  You would typically be zoomed in to the area of the

board you are working on, or at least zoomed to just the board if the board

is small.

And that's exactly the problem. You are constantly zooming in and out to

locate parts, especially if you do not have super-duper monitor

resolution combined with the eyes of an eagle (the real ones, soaring

high in the sky and able to spot a mouse a quarter mile below them).

... Parts you bring in to place will come from off screen someplace

no matter how they are arranged out there.  It makes no difference where

off screen that is.

 

This is one of the few tasks where a paper printout is still useful.  After

finishing the schematic, I print it out and put it on my desk.  As parts

are placed, they are crossed off in the schematic.  When everything on a

sheet is placed, the legend in the lower right corner is crossed off.  This

process continues until everything is crossed off, meaning all parts have

been placed.  Note that nowhere in this process does it matter at all where

the unplaced parts are, as long as they aren't on the board.

That's how we did that at the beginning of my career, almost 30 years

ago. I thought that in this day and age at least some auto-grouping

can't be too much to ask.

Imagine this process in a cramped coach class seat on a >10h

international flight where your "work space" is the size of a letter A

sheet and all you have is a netbook. I had four of those flights over

the last couple of months.

--

Regards, Joerg

http://www.analogconsultants.com/

Am 27.11.2014 19:39, schrieb Joerg:

You're going to place every component manually anyway.  It doesn't matter

where it comes from outside the board area when you bring it into the board

area to place it.  You would typically be zoomed in to the area of the

board you are working on, or at least zoomed to just the board if the board

is small.

Yes, this is EXACTLY how to create a nice layout.

And that's exactly the problem. You are constantly zooming in and out to

locate parts, especially if you do not have super-duper monitor

resolution combined with the eyes of an eagle (the real ones, soaring

high in the sky and able to spot a mouse a quarter mile below them).

No, you do NOT need ANY zooming, and you don't need to have good eyes,

either. But, to make that clearer: Olin is a professional long-term user

who surely knows EAGLE by heart and, above all, USES THE COMMAND LINE.

For placing components on board, the command line is absolutely

gorgeous, and you use it as follows:

  1. Make a printout of your schematics. That's not STRICTLY necessary,

     but - believe it or not - the quality of your routing DEFINITELY

     improves if you have a printout available and do NOT have to

     constantly switch screens between schematics and board. If you use

     TWO monitors (one for the schematics, one for the board), a

     printout is NOT necessary.

  2. Zoom into a completely EMPTY space where you later want to place

     your components.

  3. Do NOT try to zoom back to where the components actually ARE

     placed right now - just completely ignore their current positions

     (you don't know these positions, anyway).

  4. Do NOT try to move components by trying to find them on screen

     and clicking on them - that's INCREDIBLY difficult and

     time-consuming.

  5. Instead, decide which component you WANT to move by consulting the

     schematics and then TYPE the corresponding command into the board's

     command line. E.g., if you want to move R1, type 'mov r1' (+ENTER),

     and immediately you have the desired component at your mouse tip,

     INDEPENDENT of where it was located previously! You do NOT need to

     search OR zoom OR pan, so you can find and move your components

     approximately twenty times faster than by just using the mouse.

  6. After placing the component where you want it, the MOVE command is

     STILL active, so you don't even need to type it in again, so you

     just type 'N3' and have N3 at your mouse tip for easy placing.

  7. Quite often, do a RATSNEST to improve airwire display.

  8. For even quicker access, create key combinations for the MOVE

     command (e.g. CTRL+M) and RATSNEST.

This is one of the few tasks where a paper printout is still useful.  After

finishing the schematic, I print it out and put it on my desk.

Yes. As already mentioned, this creates the best routing results.

Imagine this process in a cramped coach class seat on a >10h

international flight where your "work space" is the size of a letter A

sheet and all you have is a netbook. I had four of those flights over

the last couple of months.

With the above method, you can easily ignore ANY default positioning of

components, because you ONLY work with the area where you desired that

components SHOULD go. You don't have to search and find and click.

In my opinion, EAGLE's command line is its best feature and certainly

time-saver no. 1. One just has to overcome the sometimes available

personal reluctance to use it ('typing? no - we did that with MS-DOS,

now we want to use the mouse instead').

Andreas Weidner

Am 27.11.2014 19:39, schrieb Joerg:

You're going to place every component manually anyway.  It doesn't matter

where it comes from outside the board area when you bring it into the board

area to place it.  You would typically be zoomed in to the area of the

board you are working on, or at least zoomed to just the board if the board

is small.

Yes, this is EXACTLY how to create a nice layout.

And that's exactly the problem. You are constantly zooming in and out to

locate parts, especially if you do not have super-duper monitor

resolution combined with the eyes of an eagle (the real ones, soaring

high in the sky and able to spot a mouse a quarter mile below them).

No, you do NOT need ANY zooming, and you don't need to have good eyes,

either. But, to make that clearer: Olin is a professional long-term user

who surely knows EAGLE by heart and, above all, USES THE COMMAND LINE.

For placing components on board, the command line is absolutely

gorgeous, and you use it as follows:

  1. Make a printout of your schematics. That's not STRICTLY necessary,

     but - believe it or not - the quality of your routing DEFINITELY

     improves if you have a printout available and do NOT have to

     constantly switch screens between schematics and board. If you use

     TWO monitors (one for the schematics, one for the board), a

     printout is NOT necessary.

  2. Zoom into a completely EMPTY space where you later want to place

     your components.

  3. Do NOT try to zoom back to where the components actually ARE

     placed right now - just completely ignore their current positions

     (you don't know these positions, anyway).

  4. Do NOT try to move components by trying to find them on screen

     and clicking on them - that's INCREDIBLY difficult and

     time-consuming.

  5. Instead, decide which component you WANT to move by consulting the

     schematics and then TYPE the corresponding command into the board's

     command line. E.g., if you want to move R1, type 'mov r1' (+ENTER),

     and immediately you have the desired component at your mouse tip,

     INDEPENDENT of where it was located previously! You do NOT need to

     search OR zoom OR pan, so you can find and move your components

     approximately twenty times faster than by just using the mouse.

  6. After placing the component where you want it, the MOVE command is

     STILL active, so you don't even need to type it in again, so you

     just type 'N3' and have N3 at your mouse tip for easy placing.

  7. Quite often, do a RATSNEST to improve airwire display.

  8. For even quicker access, create key combinations for the MOVE

     command (e.g. CTRL+M) and RATSNEST.

This is one of the few tasks where a paper printout is still useful.  After

finishing the schematic, I print it out and put it on my desk.

Yes. As already mentioned, this creates the best routing results.

Imagine this process in a cramped coach class seat on a >10h

international flight where your "work space" is the size of a letter A

sheet and all you have is a netbook. I had four of those flights over

the last couple of months.

With the above method, you can easily ignore ANY default positioning of

components, because you ONLY work with the area where you desired that

components SHOULD go. You don't have to search and find and click.

In my opinion, EAGLE's command line is its best feature and certainly

time-saver no. 1. One just has to overcome the sometimes available

personal reluctance to use it ('typing? no - we did that with MS-DOS,

now we want to use the mouse instead').

Andreas Weidner

Andreas Weidner wrote:

Am 27.11.2014 19:39, schrieb Joerg:

You're going to place every component manually anyway.  It doesn't

matter

where it comes from outside the board area when you bring it into the

board

area to place it.  You would typically be zoomed in to the area of the

board you are working on, or at least zoomed to just the board if the

board

is small.

 

Yes, this is EXACTLY how to create a nice layout.

 

There is another method to create nice layouts and I've seen that many

years ago on a large mainframe system (late 80s!). The layout software

clustered the parts somewhat similar to the schematic. That is much more

intuitive to many people including me and the layouters at that company

preferred this method greatly over the command line.

And that's exactly the problem. You are constantly zooming in and out to

locate parts, especially if you do not have super-duper monitor

resolution combined with the eyes of an eagle (the real ones, soaring

high in the sky and able to spot a mouse a quarter mile below them).

 

No, you do NOT need ANY zooming, and you don't need to have good eyes,

either. But, to make that clearer: Olin is a professional long-term user

who surely knows EAGLE by heart and, above all, USES THE COMMAND LINE.

For placing components on board, the command line is absolutely

gorgeous, and you use it as follows:

1. Make a printout of your schematics. That's not STRICTLY necessary,

    but - believe it or not - the quality of your routing DEFINITELY

    improves if you have a printout available and do NOT have to

    constantly switch screens between schematics and board. If you use

    TWO monitors (one for the schematics, one for the board), a

    printout is NOT necessary.

Funny that you mention it, this morning I ordered a new PC and also a

second 27" monitor with exactly such purposes in mind.

2. Zoom into a completely EMPTY space where you later want to place

    your components.

3. Do NOT try to zoom back to where the components actually ARE

    placed right now - just completely ignore their current positions

    (you don't know these positions, anyway).

4. Do NOT try to move components by trying to find them on screen

    and clicking on them - that's INCREDIBLY difficult and

    time-consuming.

5. Instead, decide which component you WANT to move by consulting the

    schematics and then TYPE the corresponding command into the board's

    command line. E.g., if you want to move R1, type 'mov r1' (+ENTER),

    and immediately you have the desired component at your mouse tip,

    INDEPENDENT of where it was located previously! You do NOT need to

    search OR zoom OR pan, so you can find and move your components

    approximately twenty times faster than by just using the mouse.

6. After placing the component where you want it, the MOVE command is

    STILL active, so you don't even need to type it in again, so you

    just type 'N3' and have N3 at your mouse tip for easy placing.

7. Quite often, do a RATSNEST to improve airwire display.

8. For even quicker access, create key combinations for the MOVE

    command (e.g. CTRL+M) and RATSNEST.

 

Sure you can do that. You could even use the mouse for the move command

like Olin said. I am used to the command line from the Orcad SDT days.

Still, not all layouters work that way. Many do not even want the

keyboard on the desk during placement and routing.

This is one of the few tasks where a paper printout is still useful.

After

finishing the schematic, I print it out and put it on my desk.

 

Yes. As already mentioned, this creates the best routing results.

 

Imagine this process in a cramped coach class seat on a >10h

international flight where your "work space" is the size of a letter A

sheet and all you have is a netbook. I had four of those flights over

the last couple of months.

 

With the above method, you can easily ignore ANY default positioning of

components, because you ONLY work with the area where you desired that

components SHOULD go. You don't have to search and find and click.

 

In my opinion, EAGLE's command line is its best feature and certainly

time-saver no. 1. One just has to overcome the sometimes available

personal reluctance to use it ('typing? no - we did that with MS-DOS,

now we want to use the mouse instead').

 

I grew up with DOS. Ok, now I've given my age away. Still, when it comes

to layouts I prefer not to have to use the keyboard much. I don't do

layouts much but I sometimes take over when very critical RF stuff must

be placed and routed.

--

Regards, Joerg

http://www.analogconsultants.com/