Category: CAD_Computing

  • SMR hard disks: Avoid them!

    Very slow performance made me wonder and so I got introduced to SMR technology. A warning is in place: Manufacturers don’t advertise SMR and if you buy a SMR drive, you’ll only be able to write data at frustratingly low speeds. Most normal computer users do not want SMR drives for that reason but since […]

  • Editing PC3, CTB, STB and PMP

    This is a seed… Situation: Large organization where administrators need to create several PC3 files per PC and per profile because users can switch from PC to PC. For some reason just sharing the same PC3 file does not work. Oh boy, that is a frustrating job! Let’s try to solve it… Introduction What we […]

  • Linux on Lenovo ThinkPad P16s

    Linux on Lenovo ThinkPad P16s

    This post describes a practical installation and is also a kind of review. A ThinkPad was deliberately chosen because the hardware is known to be pretty well supported in Linux. We’ll see… Summary Windows, preparation… Possibly I will need the pre-installed Windows version again, I will continue that installation and leave it as is . […]

  • NFS on Ubuntu

    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 sudo su apt update apt install nfs-kernel-server systemctl start nfs-kernel-server.service mkdir -p /data/acme nano /etc/exports And add this to file exports: /data/acme *(rw,sync,no_subtree_check) Next: exportfs -a ufw status ufw allow from 192.0.2.16 […]

  • The Flit: Getting rid of Apple and MS fly shit

    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 […]

  • AMD Pro 4650G workhorse: Meet PharLap

    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 […]

  • CAD Lisp and variables

    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. […]

  • Applied Mathematics concerning CAD Faces

    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. […]

  • Afplatten van regeloppervlakken tot uitslagen

    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 […]

  • Flattening ruled surfaces to blanks

    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 […]

  • GHS-pictogrammen als SVG-download

    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 […]

  • GHS pictograms as SVG download

    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 […]

  • CAD-Lisp: configuration file syntax

    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 […]

  • Linux and BricsCAD on a Lenovo Ideapad L340-15API

    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, when combined with a desktop screen. The laptop […]

  • The Linux BricsCAD pages, part 7: Publishing your drawings

    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 […]

  • The Linux BricsCAD pages, part 4: Tuning Linux

    Optimizing your Linux CAD environment. A proper work space means increased speed and optimized working pleasure… THIS ARTICLE IS ALWAYS UNDER CONSTRUCTION. YOUR POSITIVE INPUT IS APPRECIATED. Updated for Xubuntu 22.04 LTS All related parts: 1: Introduction 2: Linux base install 3: More user software 4: Tuning Linux 5: Tuning your software 6: Getting BricsCAD […]

  • The Linux BricsCAD pages, part 3: More user software

    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 […]

  • The Linux BricsCAD pages, part 2: Linux base install

    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 […]

  • The Linux BricsCAD pages, part 1: Introduction

    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. If you only want a Linux installation, these pages will help you too. Updated: Xubuntu 22.04 […]

  • The Linux BricsCAD pages, part 6: Getting BricsCAD working

    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 […]

  • The Linux BricsCAD pages, part 5: Tuning your software

    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 […]

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

    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 […]

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

    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 […]

  • Documenting: LibreOffice Writer Template Changing

    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 […]

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

    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 […]

  • CAD: Insert and units

    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 […]

  • CAD: Invoegen en eenheden

    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 […]

  • CAD: Vorm- en plaatstoleranties

    (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 […]

  • CAD: Geometric Dimensioning and Tolerancing

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

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

    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…

  • Documenting: Libraries from CAD to PDF and HTML Publications

    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 […]