Intro: Carter's Lasercut Tank - RC Jagdtiger
Hello everyone ! this is my new tank : A lasercut RC german Jagdtiger. It was their last and most massive tank destroyer, also my main tank in War Thunder ;)
It requires 3mm material (i cut mine in MDF) at the original scale, which makes it XXcm long, XXcm large, and XXcm high.
You can find the plans on its Thingiverse page. Like the Panzer, don't throw away your scraps, there are parts inside other parts.
But before you cut all the parts, you'll need to gather some material :
- A Dremel with tools to cut tiny metal rods,
- 2x Ø3mm soft rods (XXcm long),
- a Ø3mm screw rod (or soft, a recommend a screw rod here because it is cheaper and can be found easily), approx. 31cm long,
- Ø4mm tubes (Ø3mm inside) for the wheels hinges, to avoid damage on the wood,
- 4 Opitec gears (Ø20mm) if you dont want to use it, i gave equivalent wheels to cut.
If you want to motorize it, you'll need :
- a NodeMCU as microcontroller,
- a 9V battery,
- two 32g servos
- a tiny breadboard (170 points) and some wires.
Look each photo one-by-one, i added some advices or tips about the assembly.
NB : i didn't assembled mine exactly in the following order, because i might happen that i discovered some parts do not fit, and might be cut again, or else. Do not panic if you see parts that are already added before the correct step.
Are you ready now ? Let's go !
Step 1: The Lower Hull
The first one is easy. But it's only a warm-up.
Step 2: The Cannon Hinge
This part will fit in the uper hull that we will make just after. The cannon will fit inside and will be removable to make the transportation easier. Don't put too much glue, this part must fit its height in the hull. While the glue is drying, put some weight on it.
Step 3: The Upper Hull
This part will remain on the lower hull, and can be removable to access to the electronics and the cannon hinge.
Step 4: The Mudguards
They remain on the uper hull's sides. I made it removable so i can add the front part (which is curved, i didn't dare to design it) later.
Step 5: The Ventilation Face
This face remains on the upper hull. It hides the tensioner (it will be made later).
Step 6: The Front Face
It allows to access to the drive wheels gears.
Step 7: The Back Face
It is removable to allow to put the tensioner in its slide before hiding it.
Step 8: The Front Wheel
Take a ~76mm long 3mm rod.
It's the wheel which will pull the tracks. Be careful to align the teeth of both wheels layers, it happened to me to glue the two teethed wheels on the wrong slots, so just follow the dashed lines to undertsand what i mean (sorry for my bad english by the way :S )
Just stack every layers around your soft rod and add the five arms around it. Put a nice amount of glue on it, it must not slide around the rod. Then add the teethed wheels.
On the other side, add your wheel at~26mm away from the wheel. If it is the lasercut one, glue it firmly.
Step 9: The Back Wheel
Same thing for the back wheel but around a piece of tube (18 mm long for 6 layers). Add a 40mm screw but don't hide it with the cap now. We will wait to put it on tensioner before.
Step 10: The Support Wheels
Each wheels is coupled by pair on an hinge, except for the one in the center which has its own hinge (there is an odd number of wheels on a side, i might do it that way) .
Step 11: The Wheel Caps
This parts will fit on the support wheels in order to hide the screw heads. They are designed to be removable, so don't add glue when you put them. We will add them at the end.
Just stack all the layers in order.
Step 12: The Cannon
I suggest you to make the barrel separately before fit it in the breech. The total length of the barrel will depend of the maount of glue between every layer. I suggest to make the barrel approx.17cm (for the one-doted layers).
Step 13: The Servo Holder
This case receives the servos and hold them at the center of the tank. screw with a scrap of screw rod and two nuts.
You will need to hack the servos to make them able to turn 360° instead of 180°. There are two parts to cut out inside the servo.
Step 14: The Tensioner
The tensioner will hold the back wheels and use the screw to slide backward to make the future tracks stretched. You can access it by removing the ventilation face.
Step 15: The Tracks
Here comes the worst part : The tracks (*dramatic music*). It is a succession of two different track parts that turn around a tooth pick.
I suggest you to glue each track part already in the previous made one, to keep every hole parts perpendicular.
Be ready for about two days of work... Each tracks counts around 80 track parts.
Step 16: The Electronics
COMING SOON ! for the moment, i published the general shape of the tank. I'm actually working on the code.
You survived the tracks ? Hell yeah, you've done it ! now, if you want to make this monster move, you'll have to flash this code into your microcontroller.
For the pins :
- The + side of the battery on the VCC pin, and the - side on the ground (GND),
- the left 32G on the A1 pin,
- the right one on the A2 pin.
Connect your phone or your computer to your NodeMCU via WiFi. open your navigator and go to 188.8.131.52. You now have access to the interface, and control your tank.