This model is inspired by the Rayker from the game War Robots, though significant differences exist

Compatible with the A1 mini. Assembled dimensions are approximately 250*160mm (in a standard pose)

Printing Notes

The following materials have been successfully printed and assembled:

• PLA: No issues.
• PLA matte: No issues (recommended).
• PETG: Reduce the bed temperature to prevent excessive melting of the first layer, which could cause the integrated joints to stick and become impossible to unscrew. Due to its higher hardness, inserting the pins may be more challenging.

Using transparent or translucent material for the LEDs in plate 6 is recommended for optimal results. Opaque materials are also acceptable; light transmission holes are pre-drilled.

Supports are only required for the main body. Note that a lower infill density for the main body reduces weight. Support and infill settings are optimized in the 3mf file; modification is not recommended.

Assembly Instructions

Assembly is straightforward and requires no adhesive.

• Legs
  Connect the joints sequentially using cylindrical pins and secure the armor plates. Repeat four times to assemble all four legs.

  

• Main Body
  Insert the 7.5mm magnetic LED (Note the dimensions: 7.5mm diameter! Color is arbitrary) into the eye sockets and install the lenses (pupils).
  Insert the fangs (left and right); insert the weapon mounts (not left or right specific).

  

• Core
  Connect the four legs using four hexagonal pins;
  Connect the abdomen using three cylindrical pins;

  

  Finally, connect the main body using three cylindrical pins.

   

  Complete!

  

Joint Tightness

Unlike humanoid mechs, the center of gravity of a spider-type mech and its four legs are not on the same vertical line. If the overall weight is excessive and the leg joints are too flexible, it will be impossible to stand. Therefore, the leg joints must be interference fit, meaning they must be very tight.

If you find yourself questioning "Is this ridiculously tight?", then you are correct; it should be this tight.

Utilize tools such as table corners and pliers as needed during assembly.

Individual printer settings and environments vary, as does the shrinkage of the materials used. If the joints feel too loose, consider these solutions:

1. Increase the pin size. The default cylindrical pin diameter is 5mm. Increase to 5.1mm diameter.
2. Use PETG to print the pins. PETG is less prone to deformation and offers higher friction.

3. Ultimate solution—use metal hardware! Prepare M5*14 screws + nuts to replace loose cylindrical pins. Tighten the nuts to secure the joints laterally. Testing shows this is a perfect solution; it withstands wear and tear even with prolonged use, and adds a metallic aesthetic appeal.

   

Weapon Mounting

This version has four weapon mounting points: top, sides, and abdomen.
Use standard 6*3mm cylindrical magnets (theoretically compatible with 6*2mm). Plan the positive and negative polarity and firmly press the magnets in.

This version includes two side-mounted rocket launchers and two top and abdominal cannons.

Feel free to use your preferred weapons! Simply add a magnet hole to the mounting points.

(Recommended hole size is 0.1mm larger in diameter and 0.2mm deeper than the magnet. For example, a 6*3mm cylindrical magnet requires a 6.1mm*3.2mm hole)

Enjoy!