EDUstick® Creators Club
Three-sided pyramid
Four identical filled PLA triangles form a colourful hollow tetrahedron.
Your outcome: Assemble a first closed solid from four identical faces.
Illustration of the finished construction. Full-size (1:1) templates are supplied on a separate sheet.
Work 1 • stage 1/8
Make four filled faces
First close four outlines in separate template areas. Then fill each one in sequence with a single thin layer: apply strands approximately 1,1 mm wide every approximately 0,9 mm, from the bottom side towards the apex, alternating from edge to edge. Join each strand to the adjacent strand and the outline.
Choose your own colours for the faces or stripes. Let each face cool flat.
Check: You have four identical, cool triangles with sides approximately 60 mm long and a continuous fill.
If it does not work: Cover any gaps with a thin strand on the support. Remake a curved or undersized face using the template; do not bend hardened PLA.
1 × Face 1 · PLA | template F3-B-01-wall
1 × Face 2; 1 × Face 3; 1 × Face 4 · PLA | template follow the written method
→ T001 • Techniques — reference appendix
Four separate filled faces
Face 1 · Face 2 · Face 3 · Face 4
Blue / dark emphasis: the part used in this action. Arrows: visual guides. Illustration not to scale.
Work 1 • stage 2/8
Tack the first two faces
Lay face 1 flat. Align one side of face 2 with it and incline that face so that its apex is approximately 49 mm above the centre of the base. Hold the cool outer centre at least 15 mm from the edges. From the outside, make two tacks approximately 4 mm long, approximately 7 mm from the ends of the joint.
After each tack, move the nozzle away and hold the parts until rigid.
Check: Two cooled tacks join the rims and maintain the inclination of the second face.
If it does not work: Correct the alignment before the next tack. If the joint has failed, support the parts and add PLA; do not bend the face.
1 × Seam 1–2 · PLA | template follow the written method
→ T002 • Techniques — reference appendix
Two short tacks
Face 1 · Face 2 · Seam 1–2
Blue / dark emphasis: the part used in this action. Arrows: visual guides. Illustration not to scale.
Work 1 • stage 3/8
Build a corner from three faces
Place face 3 between base 1 and face 2. Align both shared sides and the top apex. The base remains flat. Hold the cool centre of face 3 from the outside; add two tacks to each joint, approximately 7 mm from the corners. Maintain your grip after each one until rigid.
Check: Three cool faces form a corner; a triangular opening the size of the fourth face remains.
If it does not work: If the edges do not align, remove the still-loose face and check its size and position. Do not force the gap closed or bend the PLA.
1 × Seam 1–3; 1 × Seam 2–3 · PLA | template follow the written method
→ T002 • Techniques — reference appendix
Tacks from the outside
Face 3 · Seam 1–3 · Seam 2–3
Blue / dark emphasis: the part used in this action. Arrows: visual guides. Illustration not to scale.
Work 1 • stage 4/8
Close with the fourth face
Hold the cool centre of face 4 from the outside, at least 15 mm from the edges. Place it against the opening from the outside: align the bottom side with the base, then align the other two sides. Do not put your fingers inside or press the face in. Make two tacks from the outside on each of the three joints. Hold until cool.
Check: The fourth face covers the entire opening, and six cool tacks join its three sides to the other faces.
If it does not work: If the edges do not align, remove the still-loose face and check its size and position. Do not force the gap closed or bend the PLA.
1 × Seam 1–4; 1 × Seam 2–4; 1 × Seam 3–4 · PLA | template follow the written method
→ T002 • Techniques — reference appendix
Tacks from the outside
Face 4 · Seam 1–4 · Seam 2–4 · Seam 3–4
Blue / dark emphasis: the part used in this action. Arrows: visual guides. Illustration not to scale.
Work 1 • stage 5/8
Complete seam 1–2
Once the tacks have cooled completely, hold the solid by the centres of the cool faces. Lift and rotate the entire assembly; lay it flat on face 3. Joint 1–2 is now accessible above the support. On the supported solid, join the tacks with fresh PLA from the outside. Fill the sections between them and up to both corners, covering both rims.
Hold the cool centre of the face at least 15 mm from the weld; move the nozzle away and let it cool before the next rotation.
Check: The edge has a continuous seam from corner to corner, joining both faces.
If it does not work: Fill the gap at the supported joint. Do not rest the model on a hot seam.
Complete seam 1–2
Complete model — all previously made parts
Blue / dark emphasis: the part used in this action. Arrows: visual guides. Illustration not to scale.
Work 1 • stage 6/8
Complete seam 1–3 / Complete seam 1–4
Once the tacks have cooled completely, hold the solid by the centres of the cool faces. Lift and rotate the entire assembly; lay it flat on face 2. Joint 1–3 is now accessible above the support. On the supported solid, join the tacks with fresh PLA from the outside. Fill the sections between them and up to both corners, covering both rims.
Hold the cool centre of the face at least 15 mm from the weld; move the nozzle away and let it cool before the next rotation. Once the tacks have cooled completely, hold the solid by the centres of the cool faces. Lift and rotate the entire assembly; lay it flat on face 2. Joint 1–4 is now accessible above the support.
On the supported solid, join the tacks with fresh PLA from the outside. Fill the sections between them and up to both corners, covering both rims. Hold the cool centre of the face at least 15 mm from the weld; move the nozzle away and let it cool before the next rotation.
Check: The edge has a continuous seam from corner to corner, joining both faces.
If it does not work: Fill the gap at the supported joint. Do not rest the model on a hot seam.
Complete seam 1–4
Complete model — all previously made parts
Blue / dark emphasis: the part used in this action. Arrows: visual guides. Illustration not to scale.
Work 1 • stage 7/8
Join with complete seams — 2/2
Begin only after all the tacks have cooled. Position the solid for each seam as follows: 2–3 on face 1; 2–4 on face 1; 3–4 on face 1. Lift and rotate the entire cool assembly. Hold the cool centre of a face at least 15 mm from the edge.
From the outside, fill the sections between the tacks and up to the corners with a strand of PLA, joining both rims. Let each seam cool before rotating.
Check: The three shown edges have continuous, cool seams from corner to corner.
If it does not work: Fill any gap or detached area while supporting the joint. If a tack has failed, repair the alignment before completing the weld.
Complete seam 3–4
Complete model — all previously made parts
Blue / dark emphasis: the part used in this action. Arrows: visual guides. Illustration not to scale.
Work 1 • stage 8/8
Check four orientations
Once completely cool, examine all six seams and four corners against the light. Stand the solid on faces 1, 2, 3, and 4 in turn; in each orientation, gently touch the top and release it. Check that it is closed and stable. Choose the orientation that best displays your colours.
Check: Four filled faces enclose a hollow interior. The model rests stably on every face; nothing comes apart.
If it does not work: Fill the gap at the supported joint and repeat the test once cool. Do not bend a warped face; it must be remade.
Test on face 4
Face 1 · Face 2 · Face 3 · Face 4
Blue / dark emphasis: the part used in this action. Arrows: visual guides. Illustration not to scale.
Finished model
View 1
Compare your model with the illustration.