All posts by Corey Burger

BSC 2018: Correcting some too thin errors

As I am fairly new to 3D printing, I am learning a tonne about what not to do. One of the biggest issues I have discovered is that things that look good in CAD can look absolutely terrible once printed, given the resolution of the printing or the limitations of FDM 3D printing. Today I wanted to talk about three different, but similar errors I made: making a part too thin to print correctly.

Back corner of the cab

First up – the back corner of the cab. As the backside of the cab is curved, it thins quite a bit at the very back corners.

Back corner of cab in blue. See the thin joint at the very end

When you bring this into Cura to slice it for printing, the problem becomes obvious.

Back corner of the cab, showig that when printed, it will only be two layers thick (~0.8mm)

The solution to this is to thicken the back wall of the cab, which I did by adding a flat piece to it:

Back corner corrected with additional piece (in red)

Once you bring that into Cura, you see that the narrowest part is now at least 1mm thick, so the piece shouldn’t be so weak.

Thicker corner sliced in Cura
Fenders

The next piece I tackled was the fenders. They were originally 0.25mm thick, which means that they were just over one layer thick when printed at 0.2mm and only two layers thick at 0.1mm. This meant they basically didn’t print at all.

Fender dimensions
Fender sliced, showing no overlap

The solution to this problem is two-fold: thicken the fender up to 0.5mm and also only print at 0.1mm (considered Fine quality).

New fender, now 100% thicker!
New sliced fender, showing overlap
Top of the windshield

This is actually entirely my error. I made the windscreen and frame around it taller than the sides or back of the cab. This meant when I cut up the model to slice, the top of the windscreen disappeared. Oops.

 

Top of the windscreen, showing the height difference

 

Top of the cab when sliced. That grey area is supposed to have yellow lines for printing

BSC 2018: First print of 1956 PANG

The new printer board for my 3D printer finally showed up, so I got to printing the first print of my 1956 PANG. It was less than a full success. As you can see in the pictures below, I have a bunch of work to do.

Printed truck on build plate. Printed without the side compartments. Excuse my messy garage

As can be seen on the build plate, a bunch of details didn’t come out right – the biggest of which was the top of the cab for some reason completely failed to print correctly. I also accidentally selected brim intead of skirt, so I had lots of cleanign to do.

Front & side view. Lledo Model A, Copplestone Chinese and Infinity Ariadna for scale

The sides of the truck aren’t very smooth, and a bunch of the finer details simply didn’t print.

Side rear view of the truck
Side rear view of the truck with Lledo Model A, Infinity Ariadna and Copplestone Chinese for scale
Front and side view of the truck

So what next? First of all,my printer needs some upgrades:

  • A part cooling fan (the Ender 2 lacks it by default)
  • Belt tighteners (and the belts replaced with metal-core of some kind)
  • A more modern Marlin (the firmware that runs the printer)
  • A lot more tuning

On the truck, the first thing I am going to do is shrink it by 25 to 30%. It is too large for what I want. Then I need to some work on the model itself

  • Thicken some of the walls so that they print, especially the fenders, which didn’t print at all
  • Clean up some of the smaller details, possibly removing them for now
  • Re-cut up the cab so it prints correctly

Anyway, I have my work cut out for me!

BSC 2018: PANG print layout

I finally got around to laying out the 1956 PANG for the first printing. As you can see from the pictures below, I am trying to remove the need for supports which will mark the surface of the final print.

Final draft for reference
Final draft for reference
Laid out in TinkerCAD for printing
Laid out in TinkerCAD for printing

I chose not to break out the rear section or the bins for initial printing. I likely will in the final version, as it will speed up print time and make it cleaner.

Cura print layout
Cura layout, with approx. print time. Note that my printer (Ender 2) has a fairly small print bed, so this will fit on it

 

One final note: I am certain that there will be tweaks needs to be this and I am missing things, namely an interior and side mirrors to start.

BSC 2018: 1956 PANG first printable draft

Build Something 2018 continues and I have been pretty quiet for the last week. Part of this is because I am waiting on the warrantied printer board, so motivation is low. Also been busy with other things. But today I kicked myself into gear and go the first printable draft done of the 1956 PANG. Take a look below (the red rectangle is 32mm high and is there for reference):

Front view of 1956 PANG truck
Front View
Front angled view of 1956 PANG
Front angled view
Rear view of the 1956 PANG
Rear view of the 1956 PANG
Side view of the 1956 PANG
Side view of the 1956 PANG
Rear angled view of the 1956 PANG
Rear angled view of the 1956 PANG

 

BSC 2018: 1956 PANG continued

Well, Build Something 2018 is well underway at Lead Adventure. You can follow all the entries, including at least two other 3D printed things, over on the subforum.

And what of our 1956 PANG tricycle truck? Yesterday saw a lot of work on the back end.  As of two days ago it looked like this:

I really didn’t like the aspect ratio of the truck – height, etc. So I completely rebuilt the back end so it was taller and thus looked narrower:

Early work on 1956 Pang

Today I started working on the front end, which is a lot harder. It has a lot of curves with curves, so it going to be a real challenge to do well. I am not overly happy with the look (too wide and squat) so might rebuild the front. Here it is in exploded view.

Front end of 1956 PANG, exploded view on right
Front end of 1956 PANG, exploded view on right

What I love about modelling this way is that if you don’t like something, it is trivial to rebuild it. Play with the ratio, etc.

An evening in the air at Trumpeter Salute

Trumpeter Salute, the best annual miniatures convention on the west coast of Canada (sorry, Gottacon. Your relentless focus on GW turns me off) is happening again this weekend and I am again reminded of why I come to conventions: to be inspired.

This evening found both Brian and I playing aerial games, although he had considerably less success with his World War One 1/72 than I did in Leviathans, where I fairly handily destroyed a British aerial cruiser and destroyer. Our third member, recovering GW player Sean, was evolving. Or something involving tails. I didn’t ask.

And the spending has begun. I picked up some Saxons for my eventual Dux Brittanium, Sean some ECW/30 Years War and Brian also managed to spend a great deal of money. And we haven’t even hit Pulp Miniatures yet.

But now, pictures:

Leviathan cruiser on cruiser action
German World War One aircraft, 1/72 scale
British World War Two aircraft, 1/300 scale

More photos tomorrow, including of Brian’s RCW game.

When the Chinese met the train, a RCW game

In a cavalcade of firsts this Sunday, my (mostly) freshly-painted Chinese met their match in our new armed train, all being played on our new gaming mat, some 6′ by 9′ of fully flocked canvas drop cloth.

The game, a preview of Brian’s Trumpeter Salute convention game, was  the defense of a small Russian town by a combined White and Chinese force. Thankfully for the Whites, they had managed to scrounge up a field gun plus a machine gun. The wealthy Chinese warlord Wu Do also brought one along to the party. Facing against them were a large Red force, including the newly-built armed train and the armoured car.

Opening shot. Red armed train the back, Whites in the foreground. Chinese are out of shot to the left.

Due to a lot of luck, the Chinese ended up being the central troops in the game. They had lots of officers and their cards kept coming up, so they quickly occupied the central building and started taking fire. Another squad rushed up a hill, only to discover what happens when a HMG opens up on you when you cannot respond.

The maddest moment of the game came when Sean’s Reds cavalry attempted to run down the White field gun. The gun was right in the middle of town, which meant that his close assault was rudely interrupted by two squads of Chinese, including the Warlord’s aggressive Household troops. This did not end well for the Red cavalry, which were slaughtered to a man (and horse).

Red cavalry attempt to run down the White gun. Chinese infantry and Wu Do in the foreground.

By the end the train had done its job and had cleared a route into the town. We called it when it became clear that the Chinese would retreat (having no interest in defending this particular muddy bit of Russia to the death) and the Whites were too weak to hold back the largely untouched Red infantry (even if they couldn’t move due to bad card luck.)

(As usual, we used Through the Mud and Blood from Too Fat Lardies. An excellent rule set all ’round)

And now for something completely different: two Cadillac ’59s

Brian and I avoid most post-WW2 gaming as a general principle (we just don’t find it all that exciting) but the one part that holds any interest for me is retro-future post-Apocolypse ala Fallout. Given I am a sucker for cars, I picked up these two on a lark during one of my many runs to the second-hand store. They have been completely repainted. Enjoy!

Front of the two '59 Cadillacs
Front of the two ’59 Cadillacs
Rear of the Cadillacs
Rear of the Cadillacs

For Canada Day: UK National Archives pictures of Canada

In commemoration of Canada Day, our former colonial masters have found some pictures of that place formerly known as their colony of Canada and very kindly shared them with us via flickr.

There are some great pieces here, including a tour by the then Price of Wales( the future Edward VIII) in 1919:

CO 1069-286-1

And domestic architecture in the 1920’s
CO 1069-290-2

An amazing find. The wholeCollection, imaginatively titled “Canada“, is up on Flickr.

(h/t to the Toronto Star)