Published By
Created On
31 May 2020 12:21:39 UTC
Transaction ID
Cost
Safe for Work
Free
Yes
3D Printing: Strong Bed Adhesion and Easy Object Removal
Two challenges with FDM 3D Printers are:
1. Getting the object to stick to the build plate during printing; failure can result in warping or even complete print failure
2. Removing the object once it's finished
I read all sorts of differing advice on the internet. After some experimentation, I found that it's actually easier than a lot of the advise I was reading (at least for PLA and PET plastics).
In brief:
1. Raise the build plate temperature. About 10⁰C (18⁰F) above recommended values worked for me, although larger parts needed a brim (a thin outline drawn around the bottom). Here are my settings (in Simplify 3D):
- 1st layer height 90% (squishes down the first layer to make it stick)
- Build plate temperature: 70⁰C (158⁰F) for PLA & 80⁰C (176⁰F) for PET
2. Simply wait for the build plate to cool down to below about 30⁰C (86⁰F), and the part easily comes off the build plate (assuming there' a place you can grab hold of it securely)
NOTE: You'll have to experiment with your printer, because different printers have different characteristics and calibrations (e.g., the temperature sensors may not be calibrated properly). Also, I've only tested this with PLA & PET. It might not work with other plastic types.
More articles, videos, etc.: https://keasigmadelta.com/blog/
...
https://www.youtube.com/watch?v=MglVTR2g2yA
1. Getting the object to stick to the build plate during printing; failure can result in warping or even complete print failure
2. Removing the object once it's finished
I read all sorts of differing advice on the internet. After some experimentation, I found that it's actually easier than a lot of the advise I was reading (at least for PLA and PET plastics).
In brief:
1. Raise the build plate temperature. About 10⁰C (18⁰F) above recommended values worked for me, although larger parts needed a brim (a thin outline drawn around the bottom). Here are my settings (in Simplify 3D):
- 1st layer height 90% (squishes down the first layer to make it stick)
- Build plate temperature: 70⁰C (158⁰F) for PLA & 80⁰C (176⁰F) for PET
2. Simply wait for the build plate to cool down to below about 30⁰C (86⁰F), and the part easily comes off the build plate (assuming there' a place you can grab hold of it securely)
NOTE: You'll have to experiment with your printer, because different printers have different characteristics and calibrations (e.g., the temperature sensors may not be calibrated properly). Also, I've only tested this with PLA & PET. It might not work with other plastic types.
More articles, videos, etc.: https://keasigmadelta.com/blog/
...
https://www.youtube.com/watch?v=MglVTR2g2yA
Author
Content Type
Unspecified
video/mp4
Language
English
More from the publisher
Controlling
VIDEO
HOW T
how-to-set-realistic-deadlines-target
So, you're convinced that you need a realistic deadline/target-date to keep your software or engineering project on track. But, how do you come up with that realistic deadline?
The truth is that you'll never know for sure exactly how long a project will take, but there are ways to make a decent estimate. In this video Hans outlines the method he usually uses, along with common pitfalls.
Click the following link for a summary:
https://keasigmadelta.com/blog/how-to-set-realistic-deadlinestarget-dates-for-software-development-projects
...
https://www.youtube.com/watch?v=gHW8J1VjMPY
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
HOW T
how-to-solve-cannot-bind-to-port-due-to
A few months ago I started having trouble with server software being unable to bind to ports because "permission denied." This video explains why (Hyper-V), and what you can do if this happens to you...
Click the following link for a summary:
https://keasigmadelta.com/blog/how-to-solve-cannot-bind-to-port-due-to-permission-denied-on-windows?stage=Stage
The StackOverflow page with the solution:
https://stackoverflow.com/questions/48478869/cannot-bind-to-some-ports-due-to-permission-denied
P.S., Sorry for the audio video syncing issues. Camtasia let me down (for the first time ever), and I simply couldn't get it to render the video in sync.
...
https://www.youtube.com/watch?v=uECJPNpfebs
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
USING
using-third-party-libraries-like-raylib
So, you've mastered compiling multi-file source-code into a program (binary). Congratulations. However, if you're going to write larger useful software, then you're going to need third-party libraries.
This video covers how to link third-party libraries into your project using CMake.
Click the following link for a summary (and to download the source code):
https://keasigmadelta.com/blog/using-a-k-a-linking-third-party-libraries-like-raylib-in-your-project-with-cmake
Want to learn more CMake? Click the following link:
https://keasigmadelta.com/store/landing/learn-cmake-by-example-bookcourse/learn-cmake/
...
https://www.youtube.com/watch?v=_5wbp_bD5HA
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
COMPI
compiling-multi-file-c++-source-code
There are plenty of C++ tutorials around, but most don't cover the essential step of how to compile multiple source files into one program. This video show how, using CMake...
Click here for a summary (and to download the example/template):
https://keasigmadelta.com/blog/compiling-multi-file-c-source-code-with-cmake
...
https://www.youtube.com/watch?v=FFXCqKMUZ7Y
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
BUGS
bugs-in-the-machine...
T'is the season for technical issues. This time, it comes from an unexpected source. Bugs. Real physical bugs. Specifically, ants...
Click the following link for a summary:
https://keasigmadelta.com/blog/bugs-in-the-machine
Credits: This video includes screenshots from Cinemaware's "It Came from the Desert." Both the original Amiga computer game, and the recent movie based on the game.
...
https://www.youtube.com/watch?v=b3PId_4cGtE
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
CONNE
connecting-filezilla-to-ftp-servers
Having trouble connecting Filezilla to an FTP server that's behind a NAT router? If it connects, but then gives a "Failed to retrieve directory listing" error, then you have likely hit a classic NAT router problem.
In this video Hans explains what goes wrong and, more importantly, an easy way to "fix" it. Enabling a hidden Filezilla feature will enable you to successfully connect to the FTP server.
Click the link below for a summary:
https://keasigmadelta.com/blog/connecting-filezilla-to-ftp-servers-behind-a-nat-router-the-easy-way
Check out the FTP server I used for testing:
keasigmadelta.com/zitaftpserver
NOTE: This also works for virtual NAT routers, which you may encounter if you're server is running on a Virtual Machine (VM) or emulator (e.g., Qemu).
...
https://www.youtube.com/watch?v=A_sPhBfOzRw
Transaction
Created
9 months ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
LOW-C
low-cost-enclosure-heater-to-keep-your
So, you've built an enclosure for your 3D printer (see https://youtu.be/yVTDA3dOHp8 ). Now it needs a heating system to keep it at constant temperature. My enclosure needed about 300W of heating power to get it to the right temperature, so typical "off the shelf" heaters weren't an option.
The Enclosure Heating System in Brief
- A 1500W hairdryer with 3 heat settings (put on the lowest heat and fan speed to get 300W)
- A temperature controller (STC-1000, easily obtainable via TradeMe/eBay)
WARNING: Wiring up the temperature controller involves mains voltages. If you're unsure how, then get someone who knows what they're doing (e.g., an electrician). Or, buy a fully assembled unit
Verdict
The heating system is acceptable. There's a slight hot spot in one corner, but it's not too hot to be a problem. It's good enough to do the job... and it was pretty cheap all up (I swiped an old hair dryer from the cupboard ;-) ).
NOTE: I recommend using a hairdryer with 3 heat and speed settings. I tried a different one with two settings, and the hot spot was enough to affect the print (made the part stick to the bed too hard).
More articles, videos, etc.: https://keasigmadelta.com/blog/
...
https://www.youtube.com/watch?v=_PVG-zyeiRc
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
HOW T
how-to-secuely-store-passwords-on-a
You're writing a program that connects to a server, and want to store the user's login details for their convenience. How do you do so securely?
Short answer: you won't be happy with any of the suggestions. Long answer: watch the video. ;-)
Click the following link for a summary:
https://keasigmadelta.com/blog/how-to-securely-store-passwords-on-a-users-computer
...
https://www.youtube.com/watch?v=JG9k9GaOKUA
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
RAYLI
raylib-2d-challenge-part-3-switching-to
The code started getting a bit complex in part 2 of this challenge, so it's time to add some structure. Otherwise, it'll quickly become unmaintainable.
Watch this video to see the difference between messy code, and code that's been restructured, and makes a good foundation for something much bigger (like an actual game, instead of a tiny demo).
Click the following link for a summary (and to download the code):
https://keasigmadelta.com/blog/raylib-2d-challenge-part-3-switching-to-c-and-structuring-the-code-right
...
https://www.youtube.com/watch?v=eW05rq1Nz2I
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English