Learn 3D Printing Step by Step

What’s in the Box?

When you unbox your new 3D printer, you’ll typically find:

• The printer frame (fully assembled or in parts)
• Power supply and cables
• Build plate
• Sample filament spool
• SD card with test files
• Tools (scraper, Allen wrenches, spare nozzles)

Step 1: Assembly (if required)

Most modern printers come pre-assembled. For the Ender 3 V3 SE, simply:

1. Attach the display screen to the frame
2. Mount the spool holder
3. Connect the power cable

Step 2: Bed Leveling

Modern printers with auto bed leveling (like the Ender 3 V3 KE and Bambu printers) handle this automatically. For manual leveling:

1. Heat the nozzle to printing temperature
2. Use a piece of paper to check gap at all four corners
3. Adjust bed knobs until you feel slight drag on the paper

Step 3: Load Filament

1. Heat the hot end to filament temperature (PLA: 200C)
2. Insert filament through the guide tube
3. Wait for filament to extrude from the nozzle
4. Trim the filament end

Step 4: Slice and Print

1. Download your first model from Thingiverse or Printables
2. Import the STL file into your slicer (Cura, Bambu Studio, or Creality Print)
3. Use default settings for PLA
4. Export G-code to SD card
5. Start printing!

Tips for Your First Print

• Start with PLA - It’s the easiest filament to work with
• Use a test file - Print the included benchy or calibration cube first
• Don’t leave unattended - Stay near the printer for the first few layers
• Keep a log - Note what settings work for future reference

Watch the Video Tutorial

For a visual walkthrough, check out our video guide:

Quick Fixes to Try First

1. Clean the bed - Wipe with isopropyl alcohol. Oils from fingerprints are a common cause
2. Apply glue stick - A thin layer of PVA glue stick works wonders for PLA
3. Increase bed temperature - Try 5-10C higher than recommended
4. Slow down first layer - Reduce first layer speed to 15-20mm/s
5. Check nozzle height - The nozzle should be about the thickness of a sheet of paper from the bed

Long-term Solutions

• Use a PEI build plate or BuildTak surface
• Ensure your bed is truly level
• Use a brim or raft for difficult prints
• Enclose the printer to reduce drafts

What is Layer Shifting?

Layer shifting occurs when the print head moves to a different position than expected, causing a visible “step” or “shift” in the printed layers. This is one of the most common 3D printing issues.

Common Causes

1. Loose Belt Tension

Symptoms: Shift occurs in one direction only (X or Y axis)

Fix: Check belt tension - belts should “twang” like a guitar string when plucked. Tighten if loose using the belt tensioner on each axis.

2. Loose Pulley Grub Screws

Symptoms: Intermittent shifting, sometimes only at high speeds

Fix: Tighten all set screws on the motor pulleys and idler pulleys. Apply thread locker for a permanent fix.

3. Mechanical Obstruction

Symptoms: Shift occurs at the same Z-height consistently

Fix: Check for cables, clips, or other objects that might be hitting the print head at a certain height.

4. Print Speed Too High

Symptoms: Shifting at high speeds only

Fix: Reduce print speed by 20-30% and see if the issue resolves.

Quick Diagnostic Flowchart

1. Does the shift happen in only one direction? → Check that axis belt tension
2. Does it happen at the same height? → Look for mechanical obstructions
3. Is it intermittent? → Check pulley grub screws
4. Does it happen at high speed? → Reduce acceleration and jerk settings

Prevention Tips

• Regularly check belt tension every 2-3 weeks
• Use thread locker on pulley set screws
• Keep print speeds within your printer’s rated limits
• Ensure cable management doesn’t interfere with movement

Sanding and Smoothing

For PLA Prints

1. Start with 120-180 grit sandpaper for rough areas
2. Progress to 220, then 320, then 400 grit
3. Finish with 600-800 grit for a smooth surface
4. Apply primer before painting

For ABS/ASA Prints - Acetone Vapor Smoothing

Place your print in a container with a small amount of acetone. The vapor will dissolve the surface layer, creating a smooth, glossy finish. WARNING: Do this outdoors or in a fume hood!

Painting Techniques

1. Prime first - Use automotive or plastic primer
2. Thin coats - Apply multiple thin coats rather than one thick coat
3. Sand between coats - Light sanding with 800+ grit between coats
4. Clear coat - Finish with a clear coat for protection

Epoxy Coating

For a perfectly smooth, injection-molded look:

1. Mix two-part epoxy resin
2. Dip or brush onto the print
3. Rotate the print to ensure even coverage
4. Let cure for 24 hours
5. Sand and polish for a glass-like finish

Understanding Key Slicer Parameters

Layer Height

The layer height is the thickness of each printed layer. This is the single most impactful setting for print quality and speed.

Quality	Layer Height	Use Case
Draft	0.2 - 0.3 mm	Quick prototypes
Standard	0.12 - 0.16 mm	General use
High Detail	0.06 - 0.1 mm	Miniatures, fine details

Rule of thumb: Layer height should be 20-80% of your nozzle diameter.

Infill Pattern and Density

Infill determines the internal structure of your print.

• 15-20% - Display models, figurines (enough for most purposes)
• 30-50% - Functional parts that bear some load
• 60-80% - Mechanical parts, gears, high-stress applications
• 100% - Only when absolutely necessary

Best patterns:

• Gyroid - Best overall strength-to-weight ratio
• Cubic - Good for quick prints with decent strength
• Grid - Simple and predictable

Support Settings

Support structures are needed for overhangs beyond 45 degrees.

• Support type: Tree supports use less material and are easier to remove
• Z distance: 0.2mm for PLA (prevents scarring)
• X/Y distance: 0.4mm (allows easy removal)
• Interface layer angle: 30 degrees (prevents supports from fusing)

Advanced Techniques

Variable Layer Height

Use thinner layers for curved/detailed areas and thicker layers for flat vertical walls. Most modern slicers support this automatically.

Adaptive Slicing

Automatically adjusts layer height based on the model’s geometry - thin layers where detail matters, thick layers for flat areas.

Video Tutorial