3D Printing Army Men: 7 Secrets for Flawless Prints

The model orientation on the build plate sets layer direction, support contact area, and the strength of thin features. For an army man, the bottom of the round base is the least critical surface, so that is the face you aim toward the plate.

Upright with a backward tilt of 15 to 20 degrees usually wins. The rifle barrel and helmet stay clear of the plate, supports land on the back and the underside of the base, and layer lines run along the body instead of across the face.

Laying the figure flat saves supports but ruins the detail. Layer lines cross the cheeks and chest, and the rifle breaks at the wrist because the layers run perpendicular to the load. For a display piece, upright costs a few extra minutes of support removal. It buys a clean silhouette.

One more move helps. Rotate the model about 30 degrees in the XY plane so the slicer's cooling fan passes over the rifle and the helmet evenly. Thin features cool at different rates when they sit parallel to the fan duct.

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  Upright, tilted 15–20°Best surface finish on the front; supports land on the back and base.
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  Flat on the backFewer supports, but layer lines cross the face and thin parts snap.
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  Rotate 30° in XYEven cooling on the rifle and helmet.

A printer that produces a beautiful cube can still be off by 0.2 mm on a 40 mm figure. That error is 0.5 percent, which matters when a base has to drop into a slotted display stand or a peg has to fit a hole. Calibrate the axes, not the vibe.

Print a 20 mm calibration cube and measure it with calipers. Then print a test bar with a 5 mm hole and a 5 mm pin. Adjust steps per millimeter and the extrusion multiplier until both clear the tolerance you need. Most FDM machines settle around ±0.1 mm after tuning, and resin machines around ±0.05 mm.

Temperature drift moves dimensions too. A drafty room changes the first layer and the top surface. Enclose the printer or move it away from the door before you chase slicer settings.

Measure after the part cools. PLA shrinks roughly 0.2 to 0.5 percent, ABS closer to 0.8 percent. If the final size matters, scale the model by that factor in the slicer instead of sanding the finished figure.

Layer height controls vertical resolution. Wall count controls shell stiffness. You cannot max out both without paying in print time, and army men punish long prints because every gram of material adds weight to a part that stands on two thin legs.

For a 40 mm figure, a 0.12 mm layer height with two perimeters gives a clean surface and reasonable strength. Drop to 0.08 mm and the helmet and hands look sharper, but print time roughly doubles. Push to 0.2 mm and the face reads as blocks.

Walls matter more than infill on small parts. Three perimeters at 0.4 mm nozzle width give the legs real bending stiffness. Infill above 20 percent adds weight and print time without much benefit at this scale.

The base is the exception. It carries the whole figure, so give it four walls and 25 percent infill. The legs can stay lighter.

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  0.08 mm layerSharpest detail, roughly twice the print time of 0.12 mm.
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  0.12 mm layerGood balance for 30–50 mm figures.
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  Three perimetersStiff legs and rifle; more useful than extra infill.

The round base creates a curved underside, and the slicer has to hold it up. Left alone, that support grid bonds to the base like glue, and prying it off takes chunks with it. Control the interface and the problem mostly disappears.

Set the support Z distance to about 0.2 mm for a 0.12 mm layer. That gap lets the support release without fusing. Use a dense support interface only under the base, and keep the rest of the support sparse so it snaps away by hand.

Place support blockers over the face, the rifle, and the helmet. These areas should print in free air or bridge on their own. If the slicer insists on a support tower under the chin, move the model or add a blocker.

Break supports off while the part is still slightly warm. Cold PLA snaps at the wrong place. Warm PLA peels clean.

Resin prints a 40 mm soldier with a sharp helmet rim and readable pockets. An FDM machine at 0.12 mm cannot match that. The catch is the handling, not the print quality.

Uncured resin irritates skin and the fumes need ventilation. Wear nitrile gloves, work near an open window or a fume hood, and keep the wash station sealed. Isopropyl alcohol for cleaning is flammable, so no open flames nearby.

Exposure time drives dimensional accuracy. Overexposed resin prints slightly fat and loses the gap between the legs. Run an exposure test print and pick the time that resolves the smallest feature without bloating.

After curing, resin figures are brittle. A thin rifle can snap if it drops. For a display army man that is fine. For a figure that gets handled, FDM with three perimeters survives better.

Hollowing saves resin and reduces peel forces on a large base, but a hollow model with no vent traps liquid resin inside. That uncured resin slowly leaks, cures unevenly, and can crack the shell weeks later.

Add two vent holes, one near the highest point and one low on the base. Diameter around 2 to 3 mm is enough for a 40 mm figure. Drain the part, then wash and cure the inside with a small UV light if you can reach it.

For FDM, hollowing rarely helps at this scale. The walls get thin, the legs lose stiffness, and the print time barely drops. Keep FDM figures solid with three perimeters.

Skip hollowing entirely if the figure is under 30 mm. The material saved is small and the risk of a trapped void is not worth it.

Fresh off the plate, an army man has support scars and layer lines. The finishing steps decide whether it looks like a toy or a collectible.

Start with flush cutters, not sandpaper. Clip supports close, then remove the nubs with a sharp blade. Sanding first just smears the plastic and clogs the paper.

For FDM, a light sand at 400 grit, then 800 grit on visible surfaces, removes layer lines without rounding edges. A brief pass with a heat gun smooths the surface, but keep the nozzle moving or the rifle will droop.

Primer fills the remaining texture. Two thin coats of filler primer, sanded between, give a surface that takes paint evenly. Then a black wash in the crevices and a dry brush on the highlights bring the detail out. That is the step where a printed figure starts to read as a sculpted one.

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  Cut, do not sand firstFlush cutters and a blade remove supports cleanly.
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  400 then 800 gritSmooths layers without rounding the rifle and helmet.
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  Filler primerTwo thin coats fill texture and hold paint.

Printing a few soldiers for a display or a prototype is a good fit for a desktop machine. The part is small, the quantity is low, and the design is yours to iterate.

The math changes when you need hundreds of identical figures, or when the figure is one piece of a larger assembly that has to fit a machined bracket. Then the question is not print quality. It is repeatability and how the plastic part interfaces with the metal one.

GreatLight runs 127 high-precision CNC machines, including 16 simultaneous 5-axis machining centers, alongside custom 3D printing. We hold ±0.005 mm on machined features and Ra 0.8–1.6 μm on functional surfaces when the design calls for it. If your army man sits on a machined base or drops into a metal display stand, we can produce both and check the fit before shipping.

Send the model and we will return a quotation and a DFM analysis within 12 hours. No minimum order quantity, from one prototype to 10,000+ parts.

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  Print in-houseLow quantity, display pieces, fast design iteration.
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  OutsourceHigh repeatability, mixed plastic and metal assembly, tight fit.