The Lightblade Learning Lab with Russ Sadler
The Lightblade Learning Lab is a series of videos that Russ did for Thinklaser Limited based on using the Lightblade 4060 Laser Cutting and Laser Engraving Machine. Thinklasers Lightblade 4060 has a 400 x 600mm bed size and was supplied with a 60W EFR laser tube. In this session, Russ investigates the anatomy of the CO2 laser beam and measures the actual diameter of the beam from his laser tube. Using a thermocouple, he confirms that the intensity is Gaussian.
Table of Contents
- The Lightblade Learning Lab with Russ Sadler
- Table of Contents
- Video Resource Files
- External Resource Links
- What Next?
- K-type Thermocouple (Note: this was not shown in the previous session)
- Paper targets (as used previously) and acrylic targets
- Looking at the characteristics of the beam, e.g. the diameter
- The ‘Pulse’ control and configuring it to Manual (timed) or Continuous (controlled by how long the button is pressed) using the menus
- Using a round target
- Removing the lens assembly to prevent ash from the target falling onto the lens
- Looking at the beam diameter
- Total beam diameter coming out of the laser tube (12.7mm in this case)
- Gaussian (‘bell-shaped’) energy density characteristic of the beam
- Need to ensure beam is lined up correctly to ensure no energy is lost at the edges
- Using the thermocouple to measure the relative energy of the beam in different places across a section of the beam
- Using the acrylic target to visualise the energy across the beam diameter at the front of the machine, i.e. just before the final mirror
- Repeating the test immediately after the laser tube
- Looking at the difference in the shape of the hole made in the acrylic targets
- Noticeable ‘step’ change in the power across the beam as it emerges from the laser tube
- Measuring the power of the beam
- Testing when replacing the molybdenum mirrors with gold-plated copper mirrors
My thanks go out to Tom at Thinklaser for giving permission to embed these videos on this site. If you are looking for a new laser machine from a quality supplier, then I would suggest you check out their website: www.thinklaser.com.
Video Resource Files
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External Resource Links
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Transcript For Anatomy of your Laser Beam
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Last updated August 26, 2021
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