Re: [Emc-users] EMC traffic

[Ralph Stirling]

You would not want to do houseplans in Openscad.  It has no provisions for 
making 2d views or projections, and no provision for dimension lines or text.

I use Openscad quite a bit for parts I will 3d print.  Sometimes I create by 
basic part geometry in Openscad, the import it into Freecad (the only other 
tool that can use ,scad files) and apply fillets or other niceties that are 
difficult in Openscad.  Freecad has python scripting, so you could "program" a 
part.  It also has some capability for 2d views with dimensioning, although it 
is very much a work in progress.

-- Ralph

On Jun 27, 2017 11:54 PM, Erik Christiansen  wrote:
Sorry for the late reply - just back from a week on the farm. (Soil test
done, so foundation & slab design can now go ahead.)

On 21.06.17 13:16, andy pugh wrote:
> On 20 June 2017 at 08:50, Erik Christiansen  wrote:
>
> > Incidentally, I've found that the Postscript printer language is sorta
> > almost like gcode on steroids. Fighting with a GUI drawing package
> > gives me chest pains, without producing useful output,
> >
>
> Have you seen OpenSCAD? 3D CAD at the command line.
>
> An example usage: https://youtu.be/IPtF5c8o-10?t=4m30s

Nooo, heard the name, but never seen it before. It is clearly much more
powerful, as it handles 3D - very nice. (Assuming the "Open" means it
runs on linux.) Fortunately, there's not a lot lost in this particular
use case, as floorplans, elevations, sections, and site plan are all 2D.
However, I have had to explicitly define variables, as described
upthread, to automate transfer of e.g. truss length from floorplan to
sectioned elevation. (So, yes, using Postscript is a hack.)

Postscript is quite efficient, though, as I've produced 8 drawings with
798 lines of text. And there's a lot of detail in the floorplan, and a
reasonable amount in the sections.

The drawings are all done, except for some details on the site plan, so
I've missed the boat for drawing it all in OpenSCAD. What I will do is
look at that for 3D design, once I've built and the mill & lathe are in
their new home. (Off-grid, solar powered, maybe with a 10 kWh
Zinc-Bromine flow battery for filling in during clouds, and for
evenings. Hopefully the price will diminish a little bit in the next 18
months. Down under, it's the northern roof plane which will carry the 6
to 7 kw PV array.)

Erik

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Re: [Emc-users] EMC traffic

[Erik Christiansen]

Sorry for the late reply - just back from a week on the farm. (Soil test
done, so foundation & slab design can now go ahead.)

On 21.06.17 13:16, andy pugh wrote:
> On 20 June 2017 at 08:50, Erik Christiansen  wrote:
> 
> > Incidentally, I've found that the Postscript printer language is sorta
> > almost like gcode on steroids. Fighting with a GUI drawing package
> > gives me chest pains, without producing useful output,
> >
> 
> Have you seen OpenSCAD? 3D CAD at the command line.
> 
> An example usage: https://youtu.be/IPtF5c8o-10?t=4m30s

Nooo, heard the name, but never seen it before. It is clearly much more
powerful, as it handles 3D - very nice. (Assuming the "Open" means it
runs on linux.) Fortunately, there's not a lot lost in this particular
use case, as floorplans, elevations, sections, and site plan are all 2D.
However, I have had to explicitly define variables, as described
upthread, to automate transfer of e.g. truss length from floorplan to
sectioned elevation. (So, yes, using Postscript is a hack.)

Postscript is quite efficient, though, as I've produced 8 drawings with
798 lines of text. And there's a lot of detail in the floorplan, and a
reasonable amount in the sections.

The drawings are all done, except for some details on the site plan, so
I've missed the boat for drawing it all in OpenSCAD. What I will do is
look at that for 3D design, once I've built and the mill & lathe are in
their new home. (Off-grid, solar powered, maybe with a 10 kWh
Zinc-Bromine flow battery for filling in during clouds, and for
evenings. Hopefully the price will diminish a little bit in the next 18
months. Down under, it's the northern roof plane which will carry the 6
to 7 kw PV array.)

Erik

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Re: [Emc-users] EMC traffic

[theman whosoldtheworld]

She looks a bit slow ... but she has many other qualities

bkt


2017-06-21 14:16 GMT+02:00 andy pugh :

> On 20 June 2017 at 08:50, Erik Christiansen 
> wrote:
>
> > Incidentally, I've found that the Postscript printer language is sorta
> > almost like gcode on steroids. Fighting with a GUI drawing package
> > gives me chest pains, without producing useful output,
> >
>
> Have you seen OpenSCAD? 3D CAD at the command line.
>
> An example usage: https://youtu.be/IPtF5c8o-10?t=4m30s
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is designed
> for the especial use of mechanical geniuses, daredevils and lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1916
> 
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Re: [Emc-users] EMC traffic

[andy pugh]

On 20 June 2017 at 08:50, Erik Christiansen  wrote:

> Incidentally, I've found that the Postscript printer language is sorta
> almost like gcode on steroids. Fighting with a GUI drawing package
> gives me chest pains, without producing useful output,
>

Have you seen OpenSCAD? 3D CAD at the command line.

An example usage: https://youtu.be/IPtF5c8o-10?t=4m30s

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is designed
for the especial use of mechanical geniuses, daredevils and lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916
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Re: [Emc-users] EMC traffic

[Erik Christiansen]

On 20.06.17 10:25, Jon Elson wrote:
> On 06/20/2017 02:50 AM, Erik Christiansen wrote:
> > Incidentally, I've found that the Postscript printer language is sorta
> > almost like gcode on steroids. Fighting with a GUI drawing package gives
> > me chest pains, without producing useful output, so I've just finished
> > drawing floorplans, elevations, sections, and started the site plan for
> > a new build, with all text input. (800 lines for 8 engineering drawings
> > for submission to the local council.)
> Don Lancaster wrote a couple books on PostScript.  One is "A PostScript
> Cookbook".  Maybe the other was actually a series of magazine articles,
> "PostScript as a programming language".  Very useful stuff to know.

The only dead-tree book I have is "Postscript Language reference, third
edition." Much good info came from BLUEBOOK.PDF, found on the
intertubes. This is my first foray into Postscript, so a steep learning
curve. Rewarding though, because each lesson learned amplifies the
horsepower applied to the next challenge. Making e.g. a simple double
glazed window function, taking length & wall thickness arguments, meant I
only ever had to think once how to draw a window. Adding a "flip"
allowed the dimension text, also taken from the arguments, to be always
the right way up.

> I do some mechanical drawings in my PC board design package. Mostly, because
> I know it very well.

I'm beginning to see why you would. I computed truss length as wall
length (computed from wall segments + window lengths) + eave + porch,
and used that in the corresponding cross-section. When I changed one of
the components in the floorplan, the truss niftily redrew itself to the
new dimensions, but left the veranda posts behind - because I'd not used
the variables to fix their position. Manual drawing would not have found
that error for me.

One thing I didn't find in the books was how to set a variable to a
computed value - all the examples were just setting it to a constant.
A little bit of experimentation revealed that an exch did the trick.
(I'm still not clear on precisely what that's doing inside Postscript.)

Erik

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Re: [Emc-users] EMC traffic

[Jon Elson]

On 06/20/2017 02:50 AM, Erik Christiansen wrote:
Incidentally, I've found that the Postscript printer 
language is sorta almost like gcode on steroids. Fighting 
with a GUI drawing package gives me chest pains, without 
producing useful output, so I've just finished drawing 
floorplans, elevations, sections, and started the site 
plan for a new build, with all text input. (800 lines for 
8 engineering drawings for submission to the local council.)
Don Lancaster wrote a couple books on PostScript.  One is "A 
PostScript Cookbook".  Maybe the other was actually a series 
of magazine articles, "PostScript as a programming 
language".  Very useful stuff to know.


I do some mechanical drawings in my PC board design package. 
Mostly, because I know it very well.


Jon

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Re: [Emc-users] EMC traffic

[Erik Christiansen]

On 19.06.17 16:42, hubert wrote:
> Just checking, It seems unusual not to have any posts in this long a period.
> My last received post was 6/17/17, 12:27 PM

IIRC, there is usually a bit of a lull in the northern hemisphere
summer. My guess is that there's been a bit of sunny weather, and
everyone's out behind or on a mower. (That or down at the beach.)

Not so down under. I'm off to the farm for another load of firewood
tomorrow. The chainsaws are already sharpened. Will have to turf out the
27 year old wood heater, though. It doesn't heat as well since the
baffle plate rolled itself up after I ran it hard during a cold spell.

Incidentally, I've found that the Postscript printer language is sorta
almost like gcode on steroids. Fighting with a GUI drawing package
gives me chest pains, without producing useful output, so I've just
finished drawing floorplans, elevations, sections, and started the site
plan for a new build, with all text input. (800 lines for 8 engineering
drawings for submission to the local council.)

Erik

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Re: [Emc-users] EMC traffic

[David Berndt]

Everyone gave up and moved to machinekit...


On Mon, 19 Jun 2017 17:42:24 -0400, hubert  wrote:

Just checking, It seems unusual not to have any posts in this long a  
period.  My last received post was 6/17/17, 12:27 PM


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Re: [Emc-users] EMC traffic

[Bertho Stultiens]

On 06/19/2017 11:42 PM, hubert wrote:
> Just checking, It seems unusual not to have any posts in this long a
> period.  My last received post was 6/17/17, 12:27 PM

Seems right... No news is good news ;-)


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(disclaimers are disclaimed)

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Re: [Emc-users] EMC traffic

[Kurt Jacobson]

I was thinking the same thing. It's very unusual for this list to be so
quiet.

Kurt Jacobson
505-303-1933
Sent from Mobile

On Jun 19, 2017 5:47 PM, "hubert"  wrote:

> Just checking, It seems unusual not to have any posts in this long a
> period.  My last received post was 6/17/17, 12:27 PM
>
> 
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