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Category: CAD_Computing

Category CAD contains a wide range of topics, from simple to quite complex, focused on BricsCAD, often useful for AutoCAD.

NFS on Ubuntu

Posted on 2021-03-062022-05-16 by vanderworp

A very condensed post about setting up an example NFS server 192.0.2.1 and client 192.0.2.16. All actions as root. Configure the server 192.0.2.1 1 2 3 4 5 6 sudo su apt update apt install nfs-kernel-server systemctl start nfs-kernel-server.service mkdir -p /data/acme nano /etc/exportssudo su apt update apt install nfs-kernel-server systemctl start nfs-kernel-server.service mkdir -p…

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The Flit: Getting rid of Apple and MS fly shit

Posted on 2020-11-072021-03-24 by vanderworp

Apple and Microsoft drop fly shit on your harddisk. Files like Thumbs.db, Thumbs.db:encryptable and .DS_Store are pooped everywhere. Although well-intentioned, these files pollute your environment. You can hardly prevent their creation but you can eradicate them. My grandmother yelled: “Those damned mosquitoes”. She grabbed the “FLIT”, she sprayed in every corner of the bedroom where…

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AMD Pro 4650G workhorse: Meet PharLap

Posted on 2020-10-232021-02-12 by vanderworp

It is always hard to come up with a system with cutting edge components without the accompanying problems and showstoppers. So this page can help you (and me), I hope you like it. This is in particular true for Linux users where unsupported hardware can be a nasty disappointment. This page is pre published in…

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CAD Lisp and variables

Posted on 2020-10-172020-10-17 by vanderworp

A simple test on the command line… Write or paste the yellow stuff and try to understand. On the command line… What is it? (defun test ( / foobar) (setq foobar T)) DEfine a FUNction “test” that sets a variable “foobar” to T (True). No need to say you have to finish with an enter….

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Applied Mathematics concerning CAD Faces

Posted on 2020-07-272022-03-18 by vanderworp

This comprehensive page is a practical collection about CAD faces with layman explanations of mathematics and additional code fragments. It deals with vectors, angles, normals, 2D projections, rotations and more. The best news is that even BricsCAD Lite supports both Lisp and 3D commands like RuleSurf. Even with limited resources you can build great solutions….

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Afplatten van regeloppervlakken tot uitslagen

Posted on 2020-07-172021-01-18 by vanderworp

Deze pagina biedt oplossingen en achtergrondinformatie over het maken van uitslagen of, meer specifiek, het afvlakken van een regeloppervlak – een “ruled surface”. Er zijn nogal wat toepassingen. Denk bijvoorbeeld aan uitslagen van een spiraalboor voor grondboren, hout- of metaalbeplating in de scheepsbouw en gebogen wanden en plafonds in de architectuur. Het doel is om…

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Flattening ruled surfaces to blanks

Posted on 2020-07-152021-06-29 by vanderworp

This page provides solutions and background information on making blanks or, more specific, flattening a ruled surface. There are quite a few applications. Consider, for example, blanks of a spiral drill for ground drilling, wood or metal plating in shipbuilding and curved walls and ceilings in architecture. In my humble opinion, the subject is totally…

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GHS-pictogrammen als SVG-download

Posted on 2020-04-302021-01-18 by vanderworp

Als je niet geïnteresseerd bent in de details, kan je hier de GHS-labels downloaden. De labels zijn omgezet van EPS naar SVG en kunnen daarom direct op webpagina’s of anders worden gebruikt. https://www.unece.org/trans/danger/publi/ghs/pictograms.html bevat de afbeeldingen. Dit is het bestand met alle variaties. Als DXF gewenst is, kunnen Inkscape SVG-bestanden eenvoudig worden opgeslagen als DXF-bestanden.Het…

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GHS pictograms as SVG download

Posted on 2020-04-252020-04-30 by vanderworp

If you are not interested in the details, you can download the GHS labels here. The labels have been converted from EPS to SVG and can therefore be used directly on web pages or different. https://www.unece.org/trans/danger/publi/ghs/pictograms.html contains the images. This is the file with all variations. If DXF is desired, Inkscape SVG files can easily…

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CAD-Lisp: configuration file syntax

Posted on 2019-10-202020-04-29 by vanderworp

There are plenty of ways to create configuration files. They all have pros and cons. What are the possibilities for CAD-Lisp? Choosing a configuration file syntax Win.ini is nice because of its simple structure. The downside is that it is limited, lacking array functionality for example. On the other side of the spectrum there is…

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Linux and BricsCAD on a Lenovo Ideapad L340-15API

Posted on 2019-10-052020-04-11 by vanderworp

From time to time we need a laptop for CAD. A cost effective solution is the Lenovo Ideapad L340-15API with standard 16GB RAM plus a Ryzen 7 GPU. Here is the story and the findings. Only modification is an upgraded M2 unit. We’re totally impressed by performance, combined with a desktop screen. The laptop screen…

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The Linux BricsCAD pages, part 7: Publishing your drawings

Posted on 2019-08-262020-11-01 by vanderworp

Printing in Linux is very different, but not harder. In fact, scripting creates extra possibilities… THIS ARTICLE IS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. All related parts: 1: Introduction 2: Linux base install 3: More user software 4: Tuning Linux 5: Tuning your software 6: Getting BricsCAD working 7: Publishing your drawings PDF as…

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The Linux BricsCAD pages, part 4: Tuning Linux

Posted on 2019-08-262021-06-06 by vanderworp

Optimizing your Linux CAD environment. A proper work space means increased speed and optimized working pleasure… THIS ARTICLE IS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. All related parts: 1: Introduction 2: Linux base install 3: More user software 4: Tuning Linux 5: Tuning your software 6: Getting BricsCAD working 7: Publishing your drawings GUI…

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The Linux BricsCAD pages, part 3: More user software

Posted on 2019-08-262021-06-06 by vanderworp

So you have a running system with almost all software installed, out of the box. But there is more: This page… With a huge amount of additions. THIS ARTICLE IS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. All related parts: 1: Introduction 2: Linux base install 3: More user software 4: Tuning Linux 5: Tuning…

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The Linux BricsCAD pages, part 2: Linux base install

Posted on 2019-08-262021-06-05 by vanderworp

So Xubuntu 21.04 it is. Ready to install? THIS ARTICLE IS ALWAYS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. All related parts: 1: Introduction 2: Linux base install 3: More user software 4: Tuning Linux 5: Tuning your software 6: Getting BricsCAD working 7: Publishing your drawings Preparation You need partitions, free disk space. Assumed…

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The Linux BricsCAD pages, part 1: Introduction

Posted on 2019-08-262021-06-05 by vanderworp

Linux is about choice, freedom and security. Great news but it looks hard to deploy a professional CAD environment in Linux. BricsCAD is the key to it and these pages are to help unlock it, from A to Z. Updated to Xubuntu 21.04 THIS ARTICLE IS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. All related…

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The Linux BricsCAD pages, part 6: Getting BricsCAD working

Posted on 2019-08-262020-04-11 by vanderworp

BricsCAD runs on Windows, macOS and… Linux. Hello security, privacy and independency! There are also some caveats and this post deals with them. THIS ARTICLE IS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. All related parts: 1: Introduction 2: Linux base install 3: More user software 4: Tuning Linux 5: Tuning your software 6: Getting…

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The Linux BricsCAD pages, part 5: Tuning your software

Posted on 2019-08-262022-05-07 by vanderworp

THIS ARTICLE IS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. All related parts: 1: Introduction 2: Linux base install 3: More user software 4: Tuning Linux 5: Tuning your software 6: Getting BricsCAD working 7: Publishing your drawings LibreOffice Sometimes LibreOffice (LO) tries to be too smart. If you type MHz, you don’t want Mhz…

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CAD: An approach to mathematical curves for engineering, part 0, just hackish.

Posted on 2019-08-152020-04-11 by vanderworp

Part 0: Drawing mathematical functions in BricsCAD and AutoCAD. Calculating x and y values with a spreadsheet and drawing the curve in BricsCAD (and AutoCAD, ZWCAD). Post-processing: smoothing and exporting as SVG for LibreOffice, PDF. This is a series about creating mathematical curves in BricsCAD (and AutoCAD).Part 0, just hackish with a spreadsheet, result driven.Part…

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CAD: An approach to mathematical curves for engineering, part 2, the coding.

Posted on 2019-07-112020-10-19 by vanderworp

This is a series about creating mathematical curves in BricsCAD (and AutoCAD).Part 0, just hackish with a spreadsheet, result driven.Part 1, the math, understanding ways to iterate.Part 2, the coding, techniques available. THIS ARTICLE IS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. In part 1 the mathematics are explained. It turns out to be a…

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Documenting: LibreOffice Writer Template Changing

Posted on 2019-06-202020-04-11 by vanderworp

Internally, LibreOffice Writer has been used for technical documentation for many years: Writer is very strong in combination with style sheets and SVG format is perfectly supported. Vector-based images can therefore be inserted very well. When you work with large documents, there are two annoying peculiarities you should be aware of. The first is that…

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CAD: An approach to mathematical curves for engineering, part 1, the math.

Posted on 2019-06-162020-04-11 by vanderworp

This is a series about creating mathematical curves in BricsCAD (and AutoCAD).Part 0, just hackish with a spreadsheet, result driven.Part 1, the math, understanding ways to iterate.Part 2, the coding, techniques available. THIS ARTICLE IS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. Introduction Mechanical engineers sometimes need mathematical curves. For example: A satellite dish is…

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CAD: Insert and units

Posted on 2019-06-122020-04-11 by vanderworp

You add an external drawing and suddenly the scale is no longer correct. It is a problem that everyone sometimes encounters. How do you solve that? This article explains the consequences of various unit settings. Do you draw in inches? Or mm? Or unitless? And how are “INSUNITS”, “INSUNITSDEFSOURCE” and “INSUNITSDEFTARGET” set? Do you find…

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CAD: Invoegen en eenheden

Posted on 2019-06-122021-05-06 by vanderworp

Je voegt een externe tekening toe en ineens klopt de schaal niet meer. Het is een probleem waar iedereen weleens tegenaan loopt. Hoe los je dat op? In dit artikel wordt uitgelegd wat de gevolgen zijn van diverse instellingen van eenheden. Teken je in inches? Of mm? Of eenheidsloos? En hoe staan “INSUNITS”, “INSUNITSDEFSOURCE” en…

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CAD: Vorm- en plaatstoleranties

Posted on 2019-06-082021-01-18 by vanderworp

(Geometric Dimensioning and Tolerancing) Dit is WORK IN PROGRESS, reacties, tips, commentaar zijn uiterst welkom! Introductie Toleranties aangeven is een ware kunst. Je moet goed nadenken over wat acceptabele waarden zijn en waar je de toleranties plaatst. Immers, te kleine toleranties zijn prijsverhogend, te grote of verkeerde toleranties leveren productie- en gebruiksproblemen op. Deel twee…

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CAD: Geometric Dimensioning and Tolerancing

Posted on 2019-06-082020-04-11 by vanderworp

Currently only in Dutch: https://vanderworp.org/nl/vorm-en-plaatstoleranties/

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Documenteren: Bibliotheken van CAD naar PDF- en HTML-publicaties

Posted on 2019-06-072021-01-18 by vanderworp

Het extraheren van illustraties uit CAD-bestanden voor documentatie is voor de hand liggend. Organisaties kunnen dit slim en goedkoop doen door XML te gebruiken. Het oorspronkelijke artikel staat hier: https://vanderworp.org/en/libraries-from-cad-to-pdf-and-html-publications/ Automatische vertaling… Automatische vertaling…

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Documenting: Libraries from CAD to PDF and HTML Publications

Posted on 2019-05-292020-04-11 by vanderworp

Extracting illustrations from CAD files for documentation is obvious. Organizations can do this smart and inexpensive by using XML. However, little can be found on the net about this. It is time for an example. For understanding the value for your organization, for learning and or for direct use. Part I: What we are going…

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