3D Printing Slicers

While the Slicer is the one that directly communicates to your printer, and while it does have nifty 3D operations (such as creating connectors), it is not a 3D Modelling tool. The workflow is you model it in a separate DCC (like Blender or Fusion 360) then import the model into slicer.

The Golden Rule of Slicing

Before diving into advanced tweaks, stick to the designated filament settings. For the most part, the default dedicated profiles work flawlessly about 90% of the time. Only start dialing in custom parameters when you actually run into a specific problem.

Workflow & Slicer Choice

A Slicer to Rule Them All? If you are just starting out, use the recommended slicer that comes with your printer (e.g., Bambu Studio for Bambu Lab, PrusaSlicer for Prusa). Funnily enough, modern slicers are like Linux distros—many share a common ancestor (Slic3r). What you learn in one can usually be applied to the others.

That said, while they are interchangeable, they do have their own quirks. For example, the U1 Snapmaker Slicer doesn't like to use Gyroid Infill as it stresses its hardware motors than usual.

Print by Object vs. Print by Layer Using the "Print by Object" sequence can take more time and bed space, but it provides excellent flexibility, especially for prototyping. If one part fails mid-print, the rest of your plate isn't ruined. (Note: Many modern slicers now allow you to skip failed objects mid-print regardless of the sequence).

DCC Axis Orientation When exporting from a DCC (like Maya or Blender), you might notice your model comes into Bambu Studio rotated. This is because 3D software often uses a Y-up axis, while slicers and CAD software use a Z-up axis. You need to configure the axis switch during export. If you forget, just press F in Bambu Studio to use the "Lay on Face" tool.

Structure & Strength

Infill Patterns For the most part, I use Gyroid and consider it a done deal. I used to default to Grid, but the nozzle dragging across the infill can cause vibrations or knock the model off the bed—issues I initially mistook for poor bed adhesion.

Caveat for Small Parts: While Gyroid is great, it’s computationally heavy on the printer's motion system for tiny, thin walls. For delicate or telescoping parts, Rectilinear or Grid is often safer because the print head travels in simpler, predictable paths.

Handling Thin Walls If a wall is 1.0mm thick, stick to 2 or 3 walls maximum (with a 0.4mm nozzle) to ensure the slicer doesn't create awkward "in-between" lines that ruin tolerances.

For things like finger pointers or antennas, you are dealing with leverage. In very thin structures, maxing out the wall count makes the part brittle. A slightly lower wall count combined with a well-chosen infill allows for a tiny bit of flex, preventing the part from snapping clean off when extended.

Modifiers for Localized Strength Don't increase the infill for the entire model if you only need strength in one spot. Use Modifiers (Right-click > Add Modifier > Height Range Modifier or Shape). This allows you to increase the wall count or infill density only at stress points (like the base of a handle), keeping the rest of the print lightweight.

The "Solid Layer" Trick Check if your slicer allows "Solid Infill on Top/Bottom" or "Internal Solid Infill" specifically at the joints or mounting points. This adds strength exactly where needed without adding friction to sliding segments.

Quality & Detail Control

Layer Height & Walls

• Layer height: 0.20mm is the standard workhorse. Drop it to 0.12mm or 0.08mm if you're printing miniatures or need invisible layer lines.
• Order of walls: Switching to Outer/Inner gives you much sharper and cleaner outside surfaces, though it might struggle slightly on extreme overhangs.
• Top Surface: Adjust "Top Shell Layers" to improve the final finish. If you want it perfectly flat, enable Cura's Ironing feature (or its equivalent in your slicer) to smooth out the top.

Bridging Always account for bridging settings. Slow down the print speed for bridges to about 10 mm/s to give the filament time to anchor and cool across the gap.

Stringing Enable “Avoid crossing perimeters” (or Combing). This keeps the travel moves inside the printed part, wiping any stringing inside the infill rather than across the model's exterior.

Hardware Synergies

The AMS (Automatic Material System) While many view the AMS purely as a multicolor tool, veteran users emphasize its value in operational continuity. Its true strengths are automatic backup spooling (running out of filament mid-print is no longer an issue), pre-set RFID material profiles, and keeping filament in a dry, controlled environment.

Nozzle Swaps I was stunned by how much faster the 0.6mm high-flow nozzle is compared to the default 0.4mm—often twice as fast, depending on the geometry. For detail work, stick to 0.4mm, but for rapid prototyping, a 0.6mm (or even 0.8mm) nozzle will massively accelerate your iteration time.

Case Study: Tall, Cylindrical Models

Standard speed settings are much too fast for tall, thin rods. High-acceleration movements (like gap infill at 350 mm/s) will cause the printer to shake and almost certainly knock the print over. Drastically reduce your speeds for the entire height of the model:

Setting	Target Speed	Why?
Outer wall	30–50 mm/s	Prevents the nozzle from "whipping" the top of the rod.
Inner wall	50–80 mm/s	Keeps the pace steady and prevents internal vibration.
Sparse infill	80–100 mm/s	Fast enough to save time, but won't shake the frame too much.
Internal solid/Gap	50–80 mm/s	Prevents aggressive, jerky movements inside the thin geometry.
Top surface	30–50 mm/s	Ensures final layers are clean without pushing the rod over.

Fans and Cooling

(A quick note on cooling) Part cooling is highly material-dependent. For PLA, you generally want the fan running at 100% after the first few layers to lock the plastic in place quickly—especially on overhangs. For PETG or ABS, too much cooling will weaken layer adhesion and cause warping. Always scale your fan speeds down for high-temperature materials unless you are actively crossing a bridge or steep overhang.