I am hoping to get some help understanding a few aspects of the gray scale engraving process. Specifically I continue to have issues regulating the darkness of the engraving. They typically come out much lighter than expected. I am using a Jtech 7W laser attached to a Shapeoko XXL.
A couple questions if you wouldn’t mind.
- When using gray scale does my min/max power setting actually effect the outcome of the engraving or does the software adjust itself accordingly based on the picture provided?
- If the above is true, should I just leave my min/max power settings at 0/100 during any gray scale operation?
- Is gray scale always the best option for a photo? If not is there a general rule of thumb for making this decision? I know there are provided thumbnails when selecting an engraving method, but I’m not quite sure I understand the benefits to either one.
- Is speed the best way to regulate the final darkness of a gray scale engraving? Will 100ipm be darker than 150ipm with the same min/max power settings on a gray scale engraving?
Here is a recent example of an engraving I did. The picture is older and in black and white but I cant seem to make the engraving darker regardless of power settings.
This example is the same photo but done on canvas with the same settings. The only difference is that this engraving was done multiple times in an attempt to darken it, however after slowing it down and increasing the max power, the engraving still came out very light.
Here were my settings for the above images. I am currently running another pass on birch ply with 5/100 min/max power settings and its still coming out very light.
Thank you for any help or tips you can provide!