In this LaserMaker STEAM course, students will create a laser engraved bamboo tube while learning how to prepare artwork for a cylindrical object. The lesson introduces circumference measurement, contour extraction, text layout, rotary axis setup, and laser processing on a curved surface.

Unlike flat boards, a bamboo tube has a curved surface. This means students need to calculate the processable design range before engraving and use a rotary axis to keep the laser focus more consistent across the surface.

1. Course Overview

This project guides students through the full workflow of engraving a bamboo tube. Students measure the tube, calculate the flat design area, open an image in LaserMaker, extract the contour, add text, assign engraving and outlining layers, enable the rotary axis, and prepare the bamboo tube for laser processing.

The example artwork uses the theme “Guangzhou.” Students can replace it with another city, school name, club name, event title, or personal design once they understand the workflow.

2. Learning Objectives

3. Real-World Context

Bamboo tube engraving is a practical example of how laser technology can be used for gifts, cultural crafts, city-themed souvenirs, event displays, handmade products, and classroom maker projects. It also helps students understand how the same design process changes when the material is not flat.

In school projects, students can customize the bamboo tube with a city name, school name, local landmark, club identity, or personal message. This turns the lesson into both a digital design activity and a cultural storytelling project.

4. Work Analysis and Measurement

Before designing the engraving artwork, measure the bamboo tube carefully. In the source project, the bamboo tube has a diameter of 80mm, a height of 90mm, and a wall thickness of 8mm.

Based on the circumference formula of a circle, the processable length is calculated as 251.2mm. Therefore, the processable range of the bamboo tube can be treated as a rectangle with a length of 251.2mm and a width of 90mm. The design should not exceed this range.

5. Materials List

Prepare the following materials and tools before starting the bamboo tube engraving project.

6. LaserMaker Modeling

6.1 Open the Image Material

In the upper function area of LaserMaker, click File, then Open. Double-click to open the image that needs to be engraved.

6.2 Extract the Guangzhou Contour

Select the “Guangzhou” image and click Contour Extraction in the graphics toolbar. Delete the original image and any extra graphics, leaving only the clean contour.

6.3 Add the Text

Click the Font tool from the drawing toolbar on the left side. Enter “Guangzhou,” set the font to Chinese Regular Script, set the font size to Initial, choose the Bold option, and drag the text to the top of the graphic.

6.4 Set the Text and Graphic Layers

Select the text and click the yellow layer in the layer palette at the lower left. This sets the text to the yellow layer.

In the processing panel at the lower right, double-click the yellow layer. Set the material to Basswood, the thickness to 8mm, and the process to Shallow Engraving. For the black layer, set the material to Basswood, the thickness to 8mm, and the process to Outlining.

6.5 Enable the Rotating Axis

In the upper function area, click File, then Options. On the options page, select Rotating Axis, click Enable Rotating Axis, and change the diameter to 80mm.

6.6 Upload the File to the Device

Click the Start button in the processing panel at the lower right to upload the file to the laser device.

7. Laser Processing with the Rotating Axis

7.1 Why the Rotating Axis Is Needed

The bamboo tube is a round object. Standard laser processing is designed for flat surfaces, so it cannot process a curved object evenly without support. On a curved surface, the laser spot size changes as the laser moves across the tube, which can cause inconsistent engraving quality.

In the example diagram, the laser spot at point A is fine, while the spot at point B becomes much larger. As the laser moves from point A to point B, the spot keeps changing, which leads to unstable processing effects.

The rotating axis helps solve this problem. It clamps the round object and rotates it while the laser works. By replacing Y-axis movement with rotation, the cylindrical surface can be processed more like a flat plane relative to the X-axis, helping the engraving effect stay more consistent.

7.2 Install the Bamboo Tube on the Rotating Axis

Choose the correct hole position and clamp the bamboo tube onto the rotating axis. Make sure the tube is held securely before processing.

7.3 Connect the Rotating Axis Power Cord

Connect the rotating axis power cord to the recess in the Y-axis rail on the right side of the equipment.

7.4 Lower the Platform and Focus the Laser Head

Use the Z-axis direction keys on the control panel to lower the processing platform. Move the laser head above the bamboo tube and use the focusing scale to set the correct focus.

8. Test, Adjust, and Reflect

Before engraving the final bamboo tube, students should check the measurement, artwork range, layer settings, rotary axis settings, and physical setup. The design should fit within the calculated 251.2mm by 90mm range.

9. Finished Project

After laser processing, the bamboo tube becomes a custom engraved cylindrical craft. Students can compare the engraved text, outline quality, and overall alignment around the tube.

10. Extension Challenge

Once students understand the workflow, they can create their own bamboo tube designs. They can change the city name, landmark image, font style, layout, or decorative pattern while keeping the same measurement and rotary engraving process.

11. Summary

In this laser engraved bamboo tube project, students learn how to analyse a cylindrical object, calculate the processable engraving range, use Contour Extraction in LaserMaker, add and style text, set engraving and outlining layers, and enable the rotating axis.

The project also helps students understand why curved materials require a different setup from flat materials. By using the rotating axis, learners can engrave round objects more smoothly and apply the same workflow to other cylindrical craft projects.