Filament – M0AWS Amateur Radio

I’m a big fan of the RaspberryPi single board computers (SBCs) and have been using them since the very first model was released. (I still have the first model even now!)

Over the years I have used RaspberryPi computers for all sorts of things. These days I use them for running services on the local LANs here at home along with a number of virtual machines providing services both locally and publicly on the internet. (Yes, you can run virtual machines (VMs) on RaspberryPi computers)

I currently have 4 x RaspberryPi 5 SBCs running 24/7 and have had them stored in a simple rack that I designed when I first got into 3D printing. The rack worked ok but, it was difficult to get access to the Pi’s without removing those around the one I wanted to access. This is a real nuisance when you have services running on them all.

I’ve now had my 3D printer for a while and decided it was time to design a better solution. Before I set about diving into the CAD software I decided to have a look on Makerworld to see if anyone else had already come up with something more suitable.

Trawling through the many offerings from hundreds of 3D designers on the Makerworld website, I found a very nice RaspberryPi Modular Racking System that looked ideal for the job.

Modular RaspberryPi Rack from Makerworld

The nice thing about this design is that each Pi module connects to the other using a simple sliding, locking pin system. This means that over time you can add more and more modules to the rack as your RaspberryPi collection grows. The other nice thing is that each Pi SBC is held on its own removable sled making it possible to remove each Pi with ease and without disturbing any of the others.

I downloaded the design into BambuStudio and went through all the component parts. I was really pleased to see that there were two sizes of module available, a single board Pi only module and a tall module for housing a RaspberryPi with a HAT installed.

Since the 4 x Pi5’s that I am using have either an NVME + 2nd Gigabit Ethernet HAT or a NVME SSD Baseboard installed I will need the taller module for each unit.

To make it easy to identify each SBC in the rack I printed each module in the same colour as the hostname of the Pi, bluepi, redpi, greenpi, orangepi and a spare slot for purplepi when I get it.

My RaspberryPi rack with 4 x Pi5's in place and operational — My RaspberryPi rack with 4 x Pi5’s in place and operational

These 4 little Pi’s work hard and CPU temperatures can exceed 50 degrees Celsius very easily. They all have the Official Pi Cooler with fan installed however, this doesn’t come on until the CPU reaches 50c and so I decided to added some extra cooling in the form of a small USB fan onto the back of each module. This reduces the operating temperature of each Pi down to around 25c under full load.

The purple slot on the end is a spare ready to house another Pi SBC. I’d love another Pi5 16GB model but, at the current ridiculous prices it makes no sense to invest in another and so I will fit my spare Pi4 into the slot for now and find something for it to do.

This has been a fun little project to print and put together and will provide the perfect solution to my Pi management woes.

More soon …

For some time I’ve been considering purchasing a 3D printer so that I can create parts for my HAM Radio projects. The issue has always been, what printer to buy?

Having searched online, watched many YouTube videos and endless reading I ended up even more confused and no closer to making a decision. In the end I decided to step away from the idea for a while and see where things went.

Some time much later I ventured back to the subject and discovered the Bambu Lab 3D printer range. These were getting rave reviews and were positioned as being ideal for the total 3D printing beginner.

Once again I read as much as I could about the Bambu Lab printers, watched endless videos and searched online for supplies, spare parts etc to ensure they were readily available.

Eventually I had all the boxes ticked.

Relatively easy to use software
MacOS/Linux supported
Can print using the filament types I need for my projects
Good size print plate
iPhone App
Wireless connectivity
Built in camera for time-lapse videos
Multi-colour filament delivery system
Sensibly priced filament
Readily available replacement parts
Active Eco System and community

Looking at all the current 3D printers available in the Bambu Lab range I decided to purchase the A1 Combo model. This has a 256 x 256mm build plate, 4 filament feed print head and the filament Automatic Management System (AMS) that makes multi-colour printing a breeze.

With the decision made all I had to do was find a supplier. Strangely enough buying direct from Bambu Lab gave the best price and with the £10 voucher and 28% off of filament bought at the same time as the printer it was a no brainer.

£528 later I had 10 rolls of filament and an A1 Combo 3D printer winging it’s way to me.

2 days later our local DPD delivery driver arrived with 2 large boxes and a comment about how heavy one of the boxes was.

Upon opening the printer box I found it was extremely well packed. The printer comes in a partially assembled form and requires some assembly by the end user. All the parts are really well labelled right down to each packet of screws being labelled with their exact use. All the tools needed to assemble the printer are included as is the easy to follow manual.

Bambu Lab screw packages labelled for each part

Bambu Lab screw set for the AMS Stand — Bambu Lab screw packages labelled for each part

Another thing I really liked about Bambu Lab is that they supply you with screws for things that aren’t in the box, like the scraper screws shown above. At first I thought this was a bit weird but, in reality this makes complete sense as printing your own tool set is a great introduction to making your first prints.

Next I attacked the heavy box, this contained the 10 reels of filament I’d purchased at the same time. I’d ordered a good assortment of colours that would keep everyone in the family happy.

Installing the BambuStudio software on my MacBook Pro was a breeze. Using the account I setup at purchase time I was soon hooked into the Bambu Lab Makerworld community.

I immediately found the tools I needed to print and set about making my first 3D prints. The software has a lot of functionality, especially when it comes to the designing of your own objects. It’s fair to say the initial learning curve is vertical however, there are some great videos on YouTube on printing downloaded objects using the BambuStudio software.

BambuLab Scraper and Stand 3D Print — ambuLab Scraper and Stand 3D Print

Whilst searching for 3D Print tools on the MakerWorld I stumbled across this really neat filament waste collector that fits nicely onto the X axis support. During the print there is a small amount of waste filament, especially if you are printing a multi-colour object as the print head has to be purged each time a new colour is required. Out the box there is nothing to catch the waste filament and so, it ends up on the floor. Fortunately the MakerWorld community resolved this issue with a multitude of options for collecting and storing the waste, all of which you can print yourself.

3D printed waste filament collection bin

The print speed is incredibly quick, much quicker than I ever imagined and it’s addictive to stand and watch the print take form right in front of your eyes.

Printing an iPhone Stand for my sister-in-law

Once I’d printed the necessary tools and a few downloaded iPhone stands for the family I set about looking at designing my own objects.

The Bambu Studio software does have the capability to design objects built in but, the learning curve is vertical and there are very few videos on YouTube showing how to use the object creation section of the software. This lead me to look for an alternative 3D CAD package that had tutorials on how to create 3D print objects. After a little searching online i found that Tinkercad has a great range of tutorials online to get people started with designing their own 3D print objects.

In no time at all I had an account created on the tinkercad site and was going through the online tutorials to learn how to use all the functionality offered in the free tier.

TinkerCAD - Designing a cooling fan mount — TinkerCAD – Designing a cooling fan mount

The online tutorials are very good and move along at a good pace with interactive examples that show you how things work. Once I’d completed the tutorials I dived straight into designing some objects of my own.

I’ve still got a lot to learn about 3D printing but, I have to say that TinkerCAD really does simplify the whole design process. Once my object designs were complete, all I had to do was export them in .stl format and then import the STL file into Bambu Studio and send it to the printer.

So far my prints have come out great and I’ve been really impressed with the quality of the finished articles.

I’ve now started on my list of HAM Radio 3D print projects and will document my progress over the next few weeks and months as I progress.

More soon …

Category: Filament

Building a new Pi Rack

Joining the 3D Print Revolution