The Top Ten RDWorks Learning Lab Videos
These are the top ten RDWorks Learning Lab Videos ranked by average number of views per month. This video looks into lens cutting theory and Russ carries out some experiments to prove his revised theory.
- Some people did not fully comprehend my theory of how lenses cut so I recap with a revised diagram.
- I re-run the test of cutting through 26mm hardwood with a 2.5″ GaAS lens at 3mm/s
- I then change the setup by removing the hardwood but leaving everything else set the same but this time burning a track on a piece of so that its surface mimics the BOTTOM surface of the hard wood We are trying to see what the beam is like at that point
- By changing the speed we can filter out the lower power from the outer part of the thick beam
- I then demonstrate that a 4″ lens will cut through the 26mm hardwood but at 2mm/s i.e. 33% less speed….but why?
- I examine the reflections off the curved surfaces of various lenses to assess the degree of curvature. The flatter the lens surface the greater the “projected” focus (according to my theory) and it illustrates why the 2.5″GaAS cuts better than the 4″ ZnSe.
- Taking a less than perfect lens and test it with my penetration test. I then begin brutally modify it in stages. I test at each stage to asses the performance change. Drilling through the axis, destroys the cutting ability
- I finally test this non-cutting lens to see if it will still focus and engrave.
- Important safety warning about working with zinc selenide.
This video is the last of the The Top Ten RDWorks Learning Lab Videos. Why not try out one of our other video series such as:
The Tangerine Tiger Series where Russ has purchased a new 500 x 300mm, 50W laser machine from eBay with a view to modifying and upgrading it. In fact, he rips out the glass laser tube and high voltage power supply and replaces them with an RF laser source and PSU from Cloudray. Find out how the expensive RF laser source compares to a glass CO2 laser tube and prepare to get your hands dirty!
The Lightblade Learning Lab is a series of videos that Russ did for Thinklaser Limited based on using the Lightblade 4060 Laser Cutting and Engraving Machine. The Lightblade 4060 has a 400 x 600mm bed size and was supplied with a 60W EFR laser tube.
The Fiber Laser Series is all about Russ’s adventures and investigations with a 30 watt fibre laser, loaned to him by Dean at Lotus Laser Systems. If you are looking to engrave metal, without the fuss of using coatings such as Thermark, Cermark or Molybdenum Disulphide spray, then this is the series for you.
The Lightburn Software Series is probably the best generic laser cutting software available (I use it for almost all of my laser work). This series has tutorials, hints and tips as well as the occasional speed comparisons between it and RDWorks. My thanks to the team at Lightburn for allowing me to embed their videos.
Check out The Concise RDWorks Learning Lab Series that condenses all of Russ’s work into an easy to follow encyclopaedia of laser knowledge.
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Transcript For Experiments to Test the Lens Cutting Theory
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Last updated August 26, 2021
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