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MOPA Fiber Laser

The MOPA/Fiber 60W Galvo-head laser does super fast engraving and marking of metals, plastics, stone, tile and other inorganic materials. It can do 3D "deep" engraving on metals for things like coins and jewelry, and can engrave and do black or white marking on many materials. It also has the ability to do color marking on stainless steel.


Cheat Sheet

Default Lens

"focus position" for default lens is -343. This is the proper offset for the head to reach the surface of the three metal blocks in the laser.

The thickness of your work surface (in millimeters) should go into the "Z" parameter.

When marking - the (lowest) calibration line should be exactly 234mm from your work surface. (If not, one of these is wrong)


Z-Adjustment

See diagram above. But remember:

  • Set the "Z" of an object to it's thickness in millimeters

  • Anytime you change a "Z", the head will have to move

  • Anytime the head moves - if the door is open - it will make you re-home!

  • Anytime you add a new object - remember to add/specify it's "Z"!

Material Settings

Pulse Width: Standard Fiber laser uses a Pulse Width of ~100ns. You might consider this a "starting point" for most settings. Rarely go much higher. Go lower for finer control and to eliminate flaring, burning, cracking, etc.

Frequency: Materials generally use settings around 20-50 kHz for general abrasion and marking. Higher frequencies generally result in less ablation and more heat. Higher settings generally used for frosting affects, and finer control in things like stainless steel colors.

Speed: Speed can be very high, especially when doing detailed hatching.

Power: Power is power...

Loop Count: How many times to repeat this pass

IMPORTANT: If you're unable to modify a parameter - you probably need to change the "Use Default Parameter" (first parameter) to "False" to allow you to modify.

Parameter Library

  • Hit the "Parameter Library" button to get ready-made settings.

  • Settings that start with "F" were imported from a fiber laser and may not have it's Pulse Width set. (The Default Pulse width of "2ns" is usually not enough to mark anything!)

  • Settings that start with "BKG" were more recent ones tested/added by Brad. Probably will work - but might not be optimal.

  • Parameter settings are usually only half the equation. A refined process requires proper hatch settings as well.

  • If you're adding entries - prefix with something distinct from "F" or "BKG" (i.e. your name, or "USER")

Hatch Settings

Most important hatch settings are:

Mark Contour: Enabling will draw a contour line around the object - i.e. will trace the perimeter. A quick operation.

Enable: This enables hatching on an object. (i.e. filling the entire object)

Hatch Style: (The graphical picture) What type of hatch fill to be used. i.e. Unidirectional, Bidirectional, inner countour ring fill, etc. (See diagram)

Line Spacing: The space between contour lines. Generally around 0.01 to 0.001. This has a HUGE affect on hatch times!

Angle: Vertical lines, horizontal, diagonal, etc.

Autorotate Angle: Change the rotation angle by this mean degrees every time. Can help eliminate hatch lines

Remember - You can have multiple hatches ("Hatch1", "Hatch2", etc) defined for a hatch setting - each has hit's own parameters

Object Settings

Object can be modified after creation - by clicking them in the "Object List" in the upper-left then changing their settings in the lower-left. This includes settings of the object itself (such as size), text, and even hatch settings. Remember to click "Apply" after making any changes for them to take effect!