Re: 3d modelling software

2021-08-23 Thread Jon Elson via cctech

On 8/23/21 3:29 PM, shad via cctech wrote:

Hello Rob,
FreeCAD is nice for modeling 3D shapes.

For 3D printing, depending on the technology of 3D printer, you need to process 
original model to convert compact sections into hollow honeycomb structure, and 
add small plastic bars into empty volumes to support the model while it's 
printed.
I'm not expert of this latter procedure and tools.

Cura does a great job of slicing the .stl model and 
computing the infill, support, etc.


Jon



Re: 3d modelling software

2021-08-23 Thread Torfinn Ingolfsen via cctech
On Mon, Aug 23, 2021 at 10:29 PM shad via cctech
 wrote:
>
>
> For 3D printing, depending on the technology of 3D printer, you need to 
> process original model to convert compact sections into hollow honeycomb 
> structure, and add small plastic bars into empty volumes to support the model 
> while it's printed.
> I'm not expert of this latter procedure and tools.
>

With FDM ("plastic glue gun") printers, this process typically
involves a program called a "slicer". You export the model from the 3D
modeling program (.amf, .wmf and .stl are the most common formats) and
input that into the slicer program, which "slices" the model into
layers, and outputs commands to the printer (commonly G-code) into a
text file. The text file is then transported to the printer (via
network, or modern sneakernet aka SDcard) where you load it and start
the printing process.

Common slicer programs are Cura
https://ultimaker.com/software/ultimaker-cura and PrusaSlicer
https://www.prusa3d.com/prusaslicer/
In general, it is easier to start with the slicer program recommended
/ supplied by the 3D printer manufacturer - they have taken the
guesswork out of the settings, which gives you better printing results
from the start.

If I have to choose between Cura and PrusaSlicer, I prefer PrusaSlicer
because it has an easier user interface.
HTH
-- 
Regards,
Torfinn Ingolfsen


Re: 3d modelling software

2021-08-23 Thread geneb via cctech

On Mon, 23 Aug 2021, shad via cctech wrote:


Hello Rob,
FreeCAD is nice for modeling 3D shapes.


Not if you've ever used a commercial product that does the same job. ;)

For 3D printing, depending on the technology of 3D printer, you need to 
process original model to convert compact sections into hollow honeycomb 
structure, and add small plastic bars into empty volumes to support the 
model while it's printed. I'm not expert of this latter procedure and 
tools.


Dictating the infill pattern of a STL file is *never* the job of the 
drawing tool, it's the job of the slicer being used to turn the STL file 
into gcode.


g.


--
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http://www.f15sim.com - The only one of its kind.
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A Multi-Value database for the masses, not the classes.
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Re: 3d modelling software

2021-08-23 Thread shadoooo via cctech
Hello Rob,
FreeCAD is nice for modeling 3D shapes.

For 3D printing, depending on the technology of 3D printer, you need to process 
original model to convert compact sections into hollow honeycomb structure, and 
add small plastic bars into empty volumes to support the model while it's 
printed.
I'm not expert of this latter procedure and tools.

Andrea

Aug 23, 2021 19:07:55 cctech-requ...@classiccmp.org:

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>    1. Tektronix XpressWare 8.1 (Cameron Kaiser)
>    2. Re: Tektronix XpressWare 8.1 (Doc Shipley)
>    3. Re: Ultrix-11 (Peter Allan)
>    4. Need Spectravideo SVI-328 parts (geneb)
>    5. 3d modelling software (Rob Jarratt)
> 
> 
> --
> 
> Message: 1
> Date: Sun, 22 Aug 2021 17:16:49 -0700 (PDT)
> From: Cameron Kaiser 
> To: cct...@classiccmp.org
> Cc: Cameron Kaiser 
> Subject: Tektronix XpressWare 8.1
> Message-ID: <202108230016.17n0gn3c16973...@floodgap.com>
> Content-Type: text/plain; charset=US-ASCII
> 
> Bitsavers has 6.3 (thank you Al) but I'm trying to push my luck and find
> 8.1 for this XP421CH Xterm. Anyone know of where it can be found?
> 
> --
>  personal: http://www.cameronkaiser.com/ 
> --
>   Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckai...@floodgap.com
> -- FOOLS! I WILL DESTROY YOU ALL! ASK ME HOW! -- "Girl Genius" 8/29/07 
> 
> 
> 
> --
> 
> Message: 2
> Date: Sun, 22 Aug 2021 21:08:21 -0500
> From: Doc Shipley 
> To: Cameron Kaiser via cctalk 
> Subject: Re: Tektronix XpressWare 8.1
> Message-ID: <8c287f5c-4ad8-1002-570c-1c671c689...@vaxen.net>
> Content-Type: text/plain; charset=utf-8; format=flowed
> 
> On 8/22/21 19:16, Cameron Kaiser via cctalk wrote:
>> Bitsavers has 6.3 (thank you Al) but I'm trying to push my luck and find
>> 8.1 for this XP421CH Xterm. Anyone know of where it can be found?
>> 
> 
> Well
> 
> There's this:
> 
> http://bio.gsi.de/DOCS/NCD/www.technogoths.demon.co.uk/tekxp400/node3.html
> 
> and there's this:
> 
> http://www.docsbox.net/V81106.tgz
> 
> Please don't kill my server.
> 
>   It's been a long long time since I had the XP400D, and I don't think I
> ever tried connecting from Windows, so you're kind of on your own.  Good
> luck!
> 
> 
>   Doc
> 
> 
> --
> 
> Message: 3
> Date: Mon, 23 Aug 2021 10:11:26 +0100
> From: Peter Allan 
> To: Warner Losh 
> Cc: "General Discussion: On-Topic and Off-Topic Posts"
>   , Ethan Dicks 
> Subject: Re: Ultrix-11
> Message-ID:
>   
> Content-Type: text/plain; charset="UTF-8"
> 
> Thanks Warner and Ethan. That is very helpful.
> 
> I had not realised that the partition sizes were REALLY hard wired - as in
> set in the code. That explains why there is no option to set the size at
> installation time.
> 
> I will redo the installation with that in mind.
> 
> Cheers
> 
> Peter
> 
> On Fri, 20 Aug 2021 at 22:03, Warner Losh  wrote:
> 
>> 
>> 
>> On Fri, Aug 20, 2021, 2:26 PM Peter Allan via cctalk <
>> cct...@classiccmp.org> wrote:
>> 
>>> The idea of using an RA81 drive as it is bigger sounds like a simple
>>> solution, but does it actually give a larger /usr partition? Even though
>>> an
>>> RD54 drive is not huge, most of it is not taken up by the root partition
>>> plus the /usr partition, but is available for use as (on the video at
>>> least) /user1.
>>> 
>>> I will give it a try after the weekend and see what happens.
>>> 
>> 
>> I was going to try tonight. The dksizes.c table suggests that it is 10MB
>> instead of 8.5MB on the RD54. Yet someone else said it was smaller, so I
>> wanted to check
>> 
>> Warner
>> 
>> 
>> Cheers
>>> 
>>> Peter Allan
>>> 
>>> On Fri, 20 Aug 2021 at 17:38, Ethan Dicks  wrote:
>>> 
>>>> On Fri, Aug 20, 2021 at 11:50 AM Peter Allan via cctalk
>>>>  wrote:
>>>>>

Re: 3d modelling software

2021-08-23 Thread John Ames via cctech
The quick-'n-easy solution I found when I needed to model some parts
for a keyboard was https://www.tinkercad.com/ - needs a modern-ish web
browser and a modestly beefy system tho.