Tips and Tricks for Glass Engraving
With a CO2 laser engraver, you’ll be able to laser engrave flat supplies similar to window glass or mirrors, spherical workpieces similar to wine or champagne glasses, and conical objects like bottles.
Cheaper, solid glasses are a good selection as a result of they typically have decrease lead content material and are extra homogeneous construction. Costly, hand-blown glasses or crystal glasses might have stresses within the materials which are aggravated by the warmth throughout laser engraving, which can trigger the glass to fracture.
You may also laser course of mirror glass with a fiber laser by eradicating solely the reflective layer on the again in order that the glass itself shouldn’t be engraved by the fiber laser, inflicting the floor to stay clean.
The Trotec Speedy flexx has each a CO2 and a fiber laser supply. Thus, you’ll be able to simply mix each processing choices with a single laser machine.
There are a variety of strategies for laser engraving glass and creating particular results. Listed here are few:
1. Moist paper towel
Utilizing a moist paper towel helps stop the engraving space from turning into tough, and results in a transparent, white engraving consequence.
Earlier than you begin engraving, apply a moist single-layer paper towel to the glass. Ensure there are not any air bubbles or overlaps. This is able to have an effect on the engraved picture. Then swap the Air Help to OFF to keep away from untimely drying of the paper throughout engraving. After engraving, the residue simply wipes off, additionally cleansing the engraving space is cleaned.
2. Utility tape
Along with moist paper towels, software tape can be used to stop the floor from roughening. With software tape, nonetheless, the engraving shade is relatively grayish and never vivid white.
As with the paper towel methodology, be sure that no air bubbles and overlaps are fashioned once you apply the tape. After engraving, clear the glass to take away any adhesive residue.
three. Engraving with out auxiliary supplies
Moist paper towel or software tape should not required for processing glass. You possibly can create results by making changes similar to altering the colour within the graphic from 100% black to about 70% grey to reduce the impact of warmth on giant floor, to optimize engraving outcomes. You may also go to the print settings, choose the rasterization sort “Ordered Dithering,” however preserve the identical parameters. This alteration causes not fairly as a lot warmth to enter the fabric; therefore, the floor is roughened much less.
Glasses with curves might be processed with the rotary engraving attachment. For detailed directions, see Suggestions and Tips Rotary Attachment.
Glasses with handles are additionally processed utilizing the rotary engraving attachment. You will need to be sure that the glasses are precisely positioned in order that the deal with shouldn’t be rotated into the engraving subject. First, transfer the Y axis (rotary movement) to the very prime. Clamp the workpiece in order that the deal with is barely above the laser beam. Because the workpiece is rotated backwards for the laser course of, there isn’t a danger of collision with the laser head. For all workpieces with handles, be sure that circumference of the glass is giant sufficient to accommodate the size of the graphic. In any other case the graphic will likely be positioned too near the deal with. You possibly can simply verify the place within the JobControl® laser software program through the use of the “What you see is what you get” operate. (WYSIWYG)
You possibly can see the precise place of your graphics within the JobControl® laser software program, through the use of the “What you see is what you get” operate (WYSIWYG) and the crosshairs. In case you are utilizing the crosshairs, merely transfer the Y axis within the goal place for lasering. Then place the job on the plate to the crosshairs. By transferring the Y axis once more, you’ll be able to verify the dimension of the job in your workpiece and proper any defective positions of the workpiece or the job.
Choose the choice “Reduce to Job Measurement” within the JobControl® Print window to assist place the graphic on the workpeice.
For photograph engraving on glass, use grayscale matrix of 70% black. This causes much less warmth to be utilized to the glass, and the consequence will likely be finer. We suggest utilizing a median decision of 500 dpi and utilizing the rasterization sort “Ordered Dithering.” This optimizes the picture information for the fabric.