i install a mini gerbil controller and have being testing on engraving photos on wood, acrylic. tiles and stone, but i encounter a problem. well i believe that i prepare the photo well enough to engrave. but i always have to set the power on the hight side in order to burn the fine detail from the face or light tones shading the problem is that with hight power the darker tones or black color over burns specially on wood end acrylic. so i wos wondering if there is a setting on light burn to be able to increase the power only on the lightter tone shadding
pic on the left the black color is very deep over burn and on the left everything is smooth to the touch but i loose the face details