The programs, in detail

Four programs of 6 to 12 weeks, worked on your printer and the prints failing this week.

Program 01 · Diagnose, don't guess

Prints that finish

We go through the diagnostic order that experienced users follow: bed and nozzle first, then temperature, then flow, then retraction, changing one thing at a time. You photograph each failure, and within a day you get a named cause rather than five suggestions.

  • 8 weeks
  • Any FDM printer
  • 3 hours a week
  • Filament to burn

Start this program

Weeks 1–2 · Machine basics

Bed, nozzle, belts and what a good first layer looks like.

Weeks 3–4 · Temperature and flow

Towers and calibration prints that mean something.

Weeks 5–6 · Retraction and cooling

Stringing, bridging and overhangs.

Weeks 7–8 · Reliability

Long prints that survive the night.

Weeks 1–2 · Anatomy

Walls, top layers and infill, and which actually add strength.

Weeks 3–4 · Orientation

Layer lines, stress and where parts break.

Weeks 5–6 · Supports

Placing them so they come off cleanly.

Weeks 7–8 · Your profiles

One per material, tested and saved.

Program 02 · Settings you understand

The slicer

Downloaded profiles work until they don't. We go through the settings that matter for strength, speed and surface, how orientation changes everything, and how to build your own profiles for each filament you use.

  • 8 weeks
  • Printing already
  • 3 hours a week
  • Any slicer

Start this program

Program 03 · Beyond downloads

Designing parts

Printing other people's files gets old. We work in free CAD software on the parts you actually need — brackets, organizers, replacements — with the tolerances that decide whether something snaps in or has to be filed for an hour.

  • 12 weeks
  • Comfortable printing
  • 4 hours a week
  • A caliper

Start this program

Weeks 1–3 · Sketching

Constraints, dimensions and a first real part.

Weeks 4–6 · Measuring

Calipers, tolerances and printing test fits.

Weeks 7–9 · Assemblies

Parts that fit together and screws that hold.

Weeks 10–12 · Your project

Something you needed, designed and printed.

Weeks 1–2 · Choosing

Matching the material to where the part will live.

Weeks 3–4 · Handling

Drying, storage, ventilation and safe practice.

Weeks 5–6 · Finishing

Sanding, priming and paint.

Program 04 · The right plastic

Materials & finishing

Material choice fixes problems that settings cannot. We cover heat and sunlight resistance, toughness, drying and storage, ventilation and handling for resin and ABS, and the sanding, priming and painting that make a print look like a product.

  • 6 weeks
  • Any level
  • 3 hours a week
  • Ventilated space

Start this program

Got a print that keeps failing?

Twenty minutes on your printer, your settings and what the photo is telling us. Free.