Guides
Quick answer
30 guides covering how these machines work and what goes wrong with them. Each one labels its figures as either published specifications or community conventions, so you know which parts to trust absolutely.
How the machines work, what goes wrong, and which numbers you can lean on.
18 guides3D printing
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How to choose a filament material
PLA, PETG, ABS, ASA, TPU and nylon each solve a different problem. Here is how to pick the right one by density, temperature and what the part actually needs to survive.
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How to choose your first 3D printer
A buying framework for a first FDM 3D printer: what auto leveling actually fixes, how much build volume you need, and the hotend flow numbers that decide real-world print speed.
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Clearing a clogged nozzle
A full clog stops extrusion completely, a partial clog just thins it out, and the right fix depends on which one you have. Here is how to tell them apart and clear each safely.
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Filament storage and drying
Every common filament pulls moisture from room air, and wet filament prints worse than old filament. Here is how to store and dry spools so they print like new.
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Why your first layer will not stick
A first layer that will not stick is almost always a dirty plate, the wrong bed temperature, or a bad Z offset. Here is how to tell them apart and fix each one.
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How FDM 3D printing works
How fused deposition modeling builds a part layer by layer, why a layer cannot be taller than the nozzle, and how nozzle diameter, layer height and volumetric flow set what a printer can actually do.
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Infill patterns and percentage
What infill percentage and pattern actually change in a 3D print, how much weight and print time they add, and when 100 percent infill is worth the cost.
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Layer adhesion and part strength
Why 3D printed parts fail along layer lines, why a layer taller than the nozzle cannot bond, and how orientation, infill and material choice change real-world strength.
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Layer shifting: causes and fixes
Layers that suddenly offset sideways partway through a print are almost always mechanical, not a slicer setting. Here is how to find which axis and part is responsible.
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Post processing 3D prints
Support removal, sanding, gap filling and finishing turn a functional print into a clean one. Here is the order that works for both FDM and resin parts.
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Printing ABS without warping
ABS warps because it shrinks unevenly as it cools. Here is what actually stops it, an enclosure, bed adhesion and draft control, and the ventilation it still needs.
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The resin printing workflow, start to finish
From filling the vat to a fully cured part, here is every stage of resin printing in order, including the safety steps that protect your skin and your drain.
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Washing and curing resin prints
A resin print is not done when it comes off the plate. Here is how to wash off uncured resin and cure a part properly, and how to protect your skin and your drain while doing it.
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Slicer settings explained
Layer height, line width and print speed explained through volumetric flow, the mm3/s number that actually limits how fast a hotend can print before it starts under-extruding.
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Stringing and oozing
Thin hairs between parts and blobs at travel moves usually come down to temperature or wet filament. Here is how to tell the two apart and fix each one before touching retraction.
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Supports and overhangs
When an overhang needs support, the difference between an overhang and a bridge, and how to choose between grid, tree and interface supports without wasting filament.
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Under extrusion: causes and fixes
Gaps between lines and weak layers are not always a clog. Under extrusion is often a flow ceiling problem the printer never reports as an error. Here is how to find it and fix it.
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Warping and lifting corners
Corners curling off the bed, most common with ABS and ASA, is usually an environment problem, not a first-layer problem. Here is what to fix first and why an enclosure alone does not solve it.
12 guidesLaser cutting and engraving
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Setting up air assist
Air assist pressure and flow rate by job: engraving, cutting thin wood, cutting thick wood, and why acrylic needs deliberately low airflow.
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Cleaning laser lenses and optics
How to safely clean a laser cutter lens and mirrors, why technique matters more than the cleaning product, and why a dirty lens is often an airflow problem.
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Holding material flat on a laser bed
How a honeycomb bed keeps material flat and why that matters for focus and burn marks, plus practical ways to flatten thin or warped stock.
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How CO2 lasers work
A CO2 laser generates light in a gas-filled tube at 10.6 micrometers, a far infrared wavelength that cuts clear acrylic and glass but still cannot mark bare metal.
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How diode lasers work
A diode laser makes light in a semiconductor chip, not a gas tube. Here is how that beam is generated, focused and turned into a cut or an engraving.
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Kerf and tolerance in laser cutting
Kerf is the material a laser beam actually removes as it cuts. Here is what sets its width, why it drifts sheet to sheet, and how to design parts that still fit.
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Which materials you can and cannot laser
Some materials laser safely, some need a specific wavelength, and some release toxic gas that damages the machine and harms you. Know the difference before you cut.
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Engraving photographs with a laser
Photo engraving turns an image into rows of burned dots or lines. Here is how that raster process works, and why more DPI helps on metal but wastes time on wood.
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Laser fire safety
The core fire safety rules for a desktop laser cutter: never leave it unattended, keep an extinguisher within reach, and know which materials flare up fastest.
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Laser focus and calibration
Focus height sets your spot size and your power density. Here is how to find it, why depth of field limits how forgiving it is, and why it needs rechecking often.
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Choosing laser safety glasses
Laser safety glasses are wavelength specific filters, not general eye protection. Diode and CO2 lasers need different, non-interchangeable glasses.
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Setting up laser ventilation
How to size an exhaust fan and duct run for a desktop laser cutter, using cubic feet per minute and duct velocity instead of guesswork.
Common questions
Where should a complete beginner start?
Start with the material you intend to print or cut rather than with the machine, because material choice drives almost every other decision. On the printing side that means understanding why PLA is forgiving and ABS is not; on the laser side it means learning which materials are safe to cut at all, since that list is shorter than most people expect.
Do these guides cover CNC routers?
No. This site covers desktop fabrication specifically, meaning benchtop 3D printers and desktop diode and CO2 lasers. CNC routing, table saws and dust collection are a different workshop with different safety rules and different machines, and pretending one guide covers both serves neither well.
Why label figures as standard or convention?
Because the difference matters when something goes wrong. A material density or a laser wavelength is a fixed fact you can build on. A rule such as keeping layer height below three quarters of the nozzle diameter is a widely used convention that works well but is not a specification, and knowing which one you are relying on tells you what is safe to bend.
How do the guides relate to the calculators?
The guides explain why a relationship holds and the calculators let you run your own numbers through it. They share the same underlying material data, so a figure quoted in a guide and the same figure produced by a calculator cannot drift apart. Most guides link directly to the tool that does their arithmetic.