This document identifies and organises important information for the VHS Laser Cutter Lenses. It is a combination of a product description document and a how-to guide.

1. Trained VHS laser cutter users.
2. Laser experience levels can range from new users to sporadic users to very experienced users.

1. How to perform basic laser cutter operations. I.e. logging in, turning on the laser, starting Lightburn, loading laser files, setting power and speed levels and performing laser cuts, general cleanup and putting away all laser related material after completing laser session.
2. How to set the lens focus height for a specific operation (ie engraving vs cutting) and material thickness using a focusing guide.

Learning about the different types of VHS laser cutter lenses will open up exciting new laser project possibilities, add to learners capabilities as well as allowing for more efficient use of the laser cutter.

VHS currently has three laser lenses that live in a storage box on the shelf on the laser bench.

1. one 2.5 inch (standard) lens. (green tape)
2. one 4 inch lens. (orange tape)
3. one compound engraving lens. (blue tape)

This is the lens that any user should find on the laser cutter when starting their session. The usual power, speed settings and focus guides work as expected with the standard lens. All trained laser users should have no issues with using the standard lens as they normally have.

This lens is used for cutting thick materials from ⅜” up to ¾” plywood/softwood and perhaps up to ½” hardwood or engraving into deep recessed pockets.

This lens is used for fine detail photo engraving. This lens when properly focused and using proper speed and power settings should be capable of producing 0.1mm dots.

Lenses are installed in the head assembly by sliding them into the lower tube and securing by snuggly tightening the lower knob and then attaching the blue air assist tube to the lens. Below is that head assembly and air assist tube without a lens installed.

1. Position the laser head lens over a gap between the bed grates.
2. Detach the air assist line from the lens.
3. While holding the laser lens with one hand loosen the knurled knob and gently slide out the lens from the head assembly.

1. Slide the lens into the head assembly and gently snug the knurled knob. Do not over-tighten.
2. Attach the air assist line to the lens

The standard and 4 inch lens have a simple push to insert and push to detach system while the engraving lens has a small diameter tube that is inserted inside of the air assist line.

Laser lens with blue air assist tube attached

Push down on outer ring to release and gently pull the blue air assist tube from lens

The laser engraving lens has a smaller diameter tube that is permanently attached to the lens. Just slide this inside the larger diameter air assist hose.

Smaller diameter air assist hose inside of larger diameter air assist hose.