How to Level the Bed on a 3D Printer Under $300? | Both Ways, Explained

Bed leveling on a sub-$300 printer comes in two flavors. The Creality Ender-3 V3 SE and Bambu Lab A1 mini are the two best-known budget models, and they handle the job in opposite ways: one is fully automatic, the other needs occasional hands-on adjustment. Both are covered here, step by step. If you are still deciding which model to buy, the best sub-$300 printers we’ve tested compare them side by side.

Bed Leveling on Sub-$300 Printers: What’s Different

On modern budget printers, “leveling” usually means the printer maps the bed surface with a sensor and compensates in software. Only the Bambu A1 mini also needs a manual bed tramming routine for physical correction. The table below shows which workflow you get.

Ender-3 V3 SE Leveling: Let the CR Touch Do It

For the Ender-3 V3 SE, leveling the bed is a fully automatic operation. The printer’s CR Touch probe measures the bed and sets the Z offset for you, so there is no paper-and-feeler-gauge guesswork.

Preheat the nozzle for your material first — the manual recommends preheating for PLA or TPU before leveling. From the printer’s Prepare menu, select Leveling and wait for the probe cycle to finish. The manual notes the print platform-to-nozzle distance should sit around 0.1 mm; the CR Touch handles that measurement automatically. When it completes, the printer stores the mesh and applies it to the next print.

Bambu A1 Mini Leveling: Auto Check, Plus Manual Tramming

The Bambu A1 mini runs bed leveling automatically before every print from Bambu Studio or the printer itself. That routine maps the bed surface and compensates for small variations. Manual tramming is different: it physically straightens the bed when the printer’s auto leveling cannot compensate for a tilted or skewed heatbed.

Bambu’s documented procedure takes about ten minutes:

1. Clean the nozzle tip and remove the hotend sock so no filament interferes.
3. Remove the build plate.
4. Run the supplied a1mini_manual_bed_screws_adjust_assist.gcode from the microSD card.
6. Repeat until all corners check out, tighten the 3 screws, reinstall the build plate, and run Settings > Maintenance > Calibration to confirm the result.

After tramming, the A1 mini still runs its own auto leveling before printing; the two steps work together, not instead of each other.

Common Leveling Mistakes to Avoid

Don’t confuse bed tramming with bed leveling. Tramming fixes mechanical alignment; auto leveling maps the surface. Both are needed on the A1 mini. Keep the nozzle clean before any adjustment, and remember that leveling is temperature-sensitive — the Creality manual’s preheat step exists because a cold bed reads differently than a printing-temperature bed.

FAQs

Do I need to level the bed before every print?

No. The Ender-3 V3 SE stores its CR Touch mesh and reapplies it automatically, so routine prints need no action. The Bambu A1 mini runs its own bed leveling at the start of each print. Manual tramming on either printer is a periodic fix, not a per-print chore.

What is the correct nozzle-to-bed gap?

Creality’s manual specifies about 0.1 mm between the print platform and nozzle for proper leveling. In practice the nozzle should just kiss the bed surface — if you feel resistance or see the bed flex, you have gone too far.

How do I know if my A1 mini needs manual tramming?

If first layers come out uneven on one side of the build plate even after auto leveling, the bed is likely tilted. Run the calibration check under Settings > Maintenance > Calibration, and if it flags a problem, go through the manual tramming steps above.