Tickle file

[Bill]

What is the purpose or function of the tickle file. How or when should it be used?

[Franklin]

Bill,

Check out the PDF titled "Setting the laser Tickle File" on this page: http://www.laserengravings.info/forum/content.php?131-Laser-Tips-Repairs-and-Tutorials

Page 2 will show you the effect of changing the tickle setting - a problem is usually apparent due to a slight vertical line just to the left and right of the engraved area, this is most noticeable on the color plastic plates, but can be seen on other products as well.
If you are not seeing these vertical lines, you probably don't need to worry about this.