Cutting Technologies

There are a set of technologies for cutting in EagleWorks, help you get better laser results.

Kerf Compensation

Laser kerf is the amount of material that is removed or lost in the cutting process, and, if not compensated for in the design, will result in loose fitting parts.

Kerf width can vary depending on a number of factors, including the material, the thickness of the material, the laser beam width and the power, the assist gas, etc.

Follow the steps below to find the exact kerf of a specific material cut with a specific group of technologies, e.g. 3mm acrylic cut with a 130W CO2 laser, speed set to 20mm/s and power set to 85%, etc.

  1. Prepare a sample of the material.
  2. Set the cutting parameters.
  3. Cut a 30mm x 30mm square.
  4. Measure the square with a set of calipers.

The difference between the design and the actual size of the square is the kerf. For example, if the square measures 29.80mm, then the kerf is 0.20mm.

The kerf compensation function offsets the cutting path by exact half the width of the kerf, in order to maintain the integrity of the original part size.

Select the drawing objects, and then select Offset polygon in the pulldown-menu Handle or click Offset Polygon to bring up the dialog Offset poly.

Offset Polygon Dialog

Set Offset to exact the half the width of the kerf, choose Auto In/Out. Click Ok, the software will create new cutting paths, which are the same distance from the original all the way around (we set a large value here to help you easily distinguish the new cutting paths from the original). Outer contours are offset outwards and inner contours are offset inwards.

Kerf Compensation Results

And the software will remove the original contours if the option Delete artwork is checked.

Limit the Cutting Speed for Small Circles

Sometimes, you have a design with both long, smooth curves and small circles. To get good cutting quality and efficiency at the same time, you should set a high cutting speed for the whole design but limit the cutting speed for those small circles.

Click System Setting in the pulldown-menu Config.

Settings-Optimize

In the page Optimize, check the option Small circle speed limit to enable a set of cutting speed limits on small circles with different diameters. You can also add your own rules and delete the default settings.

Machine Settings for Cutting

There is a set of machine settings for cutting, which affects all jobs, saved in the laser controller. You can read it from the laser if the machine is connected.

In the tab User of System Work Plat, click Read to read the settings from the laser.

Machine Settings for Cutting

The settings are in the section Cut parameters in the page Processing.

Parameter Description
Idle speed The nominal travel speed. The actual travel speed is often lower than the nominal speed due to the presence of acceleration and deceleration at the beginning and the end.
Idle Acc The travel acceleration.
Start speed The startup speed.
Min Acc The minimum cutting acceleration.
Max Acc The maximum cutting acceleration.
Idle Delay The time after the laser head traveling to the start point of the cutting path and before starting cutting.
Acc factor
G0 Acc factor
Speed factor
Key setting A group of presets matching your needs.

Before making changes, make sure to click Save to save the current settings in case of errors. If you have a presets file from us, click Open to read it and update the current settings. Change the settings only if you know what you are doing. In general, you only need to choose a preset which meet your needs, and the software will adjust the settings in a whole and make a good match.

Preset Description
Slow cutting The slowest mode.
Precision cutting The slower mode.
General cutting The medium mode.
Speed cutting The faster mode.
Super speed cutting The fastest mode.

After changing the settings, make sure to click Write to update the settings in the laser.

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