Re: 3d modelling software
Rob asked > I think I may need to get a small part 3d printed (some plastic board > mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for > a novice? Preferably free! I've found OpenSCAD to be perfect for things like brackets, machine parts and so on. It's no good for figurines and other complex curved objects, perhaps use Blender for those. It also has its quirks and limitations such as being notoriously crappy at fillets, but even passable versions of those can be achieved now (see https://www.thingiverse.com/thing:4932117). I like being able to model solids from first principles, where the model's source is literally just that, a piece of source code. Easy to email or print. And I know that my model is always going to be around and not beholden to the cloud. You can get the program at http://openscad.org/ Being code I think anyone here on cctalk could pick up the gist of it in only one or two clock cycles. Some public models of mine at https://www.thingiverse.com/1944gpw/designs feel free to look at the source which I provide with all my public designs. An STL file is not a source file, but a .scad file is, and is naturally parametric. And only three consecutive keypresses required to generate an STL file ready for slicing: F5 (preview) then F6 (render) and then F7 (save STL). That's fantastically simple. Other free CAD apps I've used include FreeCAD but I found it crashed when trying to import machine-generated DXF files of involute gears with line segments that weren't properly closed. OpenSCAD imported them no problem. Why not give it a try, I'm sure it would be ideal for your guide rails. Steve.
Re: 3d modelling software
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
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
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. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!
Re: 3d modelling software
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: > Send cctech mailing list submissions to > cct...@classiccmp.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://www.classiccmp.org/mailman/listinfo/cctech > or, via email, send a message with subject or body 'help' to > cctech-requ...@classiccmp.org > > You can reach the person managing the list at > cctech-ow...@classiccmp.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of cctech digest..." > > > Today's Topics: > > 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: cctalk@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 < >> cctalk@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: > I just installed Ultrix-11 3.1 using the ultrix31.tap file from > https://pdp-11.org.ru/files.pl?lang=en > which is the location from the comments in Stephen's Machine Room >>> video on > YouTube that I think started this thread. > > It installed just fine, but just like the video, I ran out of space on /usr. /usr was usually tight back in the day. > How can I make a larger /usr partition? Is it possible to do this at > installation time? There did not seem to be an option for this. Can >>> it be > done by using an additional disk? That would seem likely, but not >>> what a >
Re: 3d modelling software
Cool. It wasn’t working that well when I tried. > On Aug 23, 2021, at 12:35, Paul Koning wrote: > > Mac OS, 64 bit Intel until recently, Arm64 right now. It's still the Intel > build, that works impressively well through Rosetta 2. The current version > is 0.19. I haven't run into significant issues with it for quite a while. > It's been pretty solid since 0.14 in my usage. That's a bit off the beaten > track, perhaps; I mostly do my modeling in a 5000 line Python script, and use > my own export to PovRAY rather than the FreeCAD Render workbench. But I did > use that a bit, in some experiments with the KiCAD importer. That's pretty > slick, converting a PCB layout to a 3d CAD model. > >paul > >> On Aug 23, 2021, at 2:19 PM, Alan Perry wrote: >> >> What OS were you running it on? When I first started trying to use it a >> couple years ago on a Mac, it didn’t work so well. I started trying to make >> it work better and then realized that I was spending most of my time trying >> to make the tool work and not so much time modeling the part that I was >> trying replicate and threw in the towel and started using Fusion 360. Using >> Fusion 360 has had some advantages when getting the part made (there is a >> common language for tweaking the model). >> >> alan >> On Aug 23, 2021, at 09:59, Paul Koning via cctalk wrote: >>> >>> I haven't used it for 3d printing work, but from other use I can recommend >>> FreeCAD3d. That is open source software, so free for everyone, not just >>> for "students". >>> >>> It has a GUI, and it can also be scripted using Python, which is a great >>> way to construct very complex models. I've used it to model a SF spaceship. >>> >>> paul >>> On Aug 23, 2021, at 12:29 PM, Rob Jarratt via cctalk wrote: I think I may need to get a small part 3d printed (some plastic board mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for a novice? Preferably free! Thanks Rob >>> >
Re: 3d modelling software
On 8/23/21 1:19 PM, Alan Perry via cctalk wrote: What OS were you running it on? When I first started trying to use it a couple years ago on a Mac, it didn’t work so well. I started trying to make it work better and then realized that I was spending most of my time trying to make the tool work and not so much time modeling the part that I was trying replicate and threw in the towel and started using Fusion 360. Using Fusion 360 has had some advantages when getting the part made (there is a common language for tweaking the model). I recently got a free 3D printer tossed out at work. I use Linux pretty exclusively, and so downloaded FreeCad. The problem is the developers are changing things so fast the docs and on-line tutorials are having trouble keeping up to date. It is a very complex software package, but it DOES work if you can learn the mindset of it. There are sketches, extrusions, solids of revolution, etc. So, this is a mixed recommendation, but if you have a complex part to design, it is probably worth the effort to learn the basics. As far as I can tell, it will do everything Inventor will do. Jon
RE: 3d modelling software
Rob, I asked on the Radio Club net. The other program mentioned RS Design Spark https://www.rs-online.com/designspark Dave G4UGM > -Original Message- > From: cctalk On Behalf Of Rob Jarratt via > cctalk > Sent: 23 August 2021 17:29 > To: General Discussion: On-Topic and Off-Topic Posts > > Subject: 3d modelling software > > I think I may need to get a small part 3d printed (some plastic board mounting > guide rails from a PDP 11/24 H7140 PSU). What software is best for a novice? > Preferably free! > > > > Thanks > > > > Rob
Re: 3d modelling software
Mac OS, 64 bit Intel until recently, Arm64 right now. It's still the Intel build, that works impressively well through Rosetta 2. The current version is 0.19. I haven't run into significant issues with it for quite a while. It's been pretty solid since 0.14 in my usage. That's a bit off the beaten track, perhaps; I mostly do my modeling in a 5000 line Python script, and use my own export to PovRAY rather than the FreeCAD Render workbench. But I did use that a bit, in some experiments with the KiCAD importer. That's pretty slick, converting a PCB layout to a 3d CAD model. paul > On Aug 23, 2021, at 2:19 PM, Alan Perry wrote: > > What OS were you running it on? When I first started trying to use it a > couple years ago on a Mac, it didn’t work so well. I started trying to make > it work better and then realized that I was spending most of my time trying > to make the tool work and not so much time modeling the part that I was > trying replicate and threw in the towel and started using Fusion 360. Using > Fusion 360 has had some advantages when getting the part made (there is a > common language for tweaking the model). > > alan > >> On Aug 23, 2021, at 09:59, Paul Koning via cctalk >> wrote: >> >> I haven't used it for 3d printing work, but from other use I can recommend >> FreeCAD3d. That is open source software, so free for everyone, not just for >> "students". >> >> It has a GUI, and it can also be scripted using Python, which is a great way >> to construct very complex models. I've used it to model a SF spaceship. >> >> paul >> >>> On Aug 23, 2021, at 12:29 PM, Rob Jarratt via cctalk >>> wrote: >>> >>> I think I may need to get a small part 3d printed (some plastic board >>> mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for >>> a novice? Preferably free! >>> >>> >>> >>> Thanks >>> >>> >>> >>> Rob >>> >>
Re: 3d modelling software
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.
Re: 3d modelling software
On 23/08/2021 17:29, Rob Jarratt via cctalk wrote: I think I may need to get a small part 3d printed (some plastic board mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for a novice? Preferably free! The hobbyist version of Fusion 360 is free. It's what I use. I've tried FreeCAD more than once but it still has some serious bugs. Tinkercad is also free but more limited and although it might be easier to get started with, it's more difficult to do some operations in. I'd avoid Sketchup because it's renowned for producing faulty STL files unless you're careful. If you want some help, you know I'm not very far away. I can certainly I can test STL files out for you, and possibly even print some, depending on what they are. -- Pete Pete Turnbull
Re: 3d modelling software
What OS were you running it on? When I first started trying to use it a couple years ago on a Mac, it didn’t work so well. I started trying to make it work better and then realized that I was spending most of my time trying to make the tool work and not so much time modeling the part that I was trying replicate and threw in the towel and started using Fusion 360. Using Fusion 360 has had some advantages when getting the part made (there is a common language for tweaking the model). alan > On Aug 23, 2021, at 09:59, Paul Koning via cctalk > wrote: > > I haven't used it for 3d printing work, but from other use I can recommend > FreeCAD3d. That is open source software, so free for everyone, not just for > "students". > > It has a GUI, and it can also be scripted using Python, which is a great way > to construct very complex models. I've used it to model a SF spaceship. > >paul > >> On Aug 23, 2021, at 12:29 PM, Rob Jarratt via cctalk >> wrote: >> >> I think I may need to get a small part 3d printed (some plastic board >> mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for >> a novice? Preferably free! >> >> >> >> Thanks >> >> >> >> Rob >> >
Re: 3d modelling software
I think I may need to get a small part 3d printed (some plastic board mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for a novice? Preferably free! Thanks Rob I use the web version of Sketchup 3D. It's now owned by Trimble. It gets me by for making project boxes and parts. -- : Ethan O'Toole
Re: 3d modelling software
If you prefer programming, OpenSCAD https://openscad.org/ might be the 3D modeling software for you. HTH -- Regards, Torfinn Ingolfsen
Re: 3d modelling software
On Mon, 23 Aug 2021, Alan Perry via cctalk wrote: I use Fusion360. It is free for hobbyists and students. ...for now. Pray Autodesk doesn't alter the deal further. Again. For a true, completely offline, free parametric design package, take a look at Solid Edge 2020 Community Edition. The only in-built restriction is the inability of the commercial edition of Solid Edge from opening native format files created by the Community Edition. It's a perpetual license too - you don't even enter a license key. Download and go. It only works under Windows however. g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!
Re: 3d modelling software
I haven't used it for 3d printing work, but from other use I can recommend FreeCAD3d. That is open source software, so free for everyone, not just for "students". It has a GUI, and it can also be scripted using Python, which is a great way to construct very complex models. I've used it to model a SF spaceship. paul > On Aug 23, 2021, at 12:29 PM, Rob Jarratt via cctalk > wrote: > > I think I may need to get a small part 3d printed (some plastic board > mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for > a novice? Preferably free! > > > > Thanks > > > > Rob >
Re: 3d modelling software
I use Fusion360. It is free for hobbyists and students. alan > On Aug 23, 2021, at 09:34, Rob Jarratt via cctalk > wrote: > > I think I may need to get a small part 3d printed (some plastic board > mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for > a novice? Preferably free! > > > > Thanks > > > > Rob >
