![]() ![]() Check it at different spots and see if the tolerances are ok. Example: cut a rectangle and then cut a rabbet around the perimeter of the rectangle leaving 0.25" depth. You should be routing with a flat bottom tool so it’s easier to measure. ![]() I even tried routering out three 25mm wide sections right down the length of the spoilboard (on the left side, middle, and right side of the table) and then with the same tool engraving three separate 3mm wide sections down the same routered areas and still I get a differing engraved depth. Then I place the material to be engraved on the top and still get an engraved depth which differs at different parts of the table. I normally use a spoilboard - sheet of MDF which I then machine about 1.5 mm off the top to supposedly get a completely level surface. ![]() What can be causing this? Has this happened to anyone else? Is there anything that can be done to solve this issue?Īre you using a spoilboard, and do you level it? Many CNC machines have the ability for adjustment and shims may be required. For instance, if I set my software to engrave into a material to a depth of 1mm, I find that on some areas of the material, even when the material is the same thickness right across it's whole surface, the engraved depth is say less that 0.5mm when of course it should engrave to 1mm anywhere on the material. I own a small CNC router - 1000 x 800 mm - and have noticed that the machining Z height across the complete surface of the machining bed area is not level. ![]()
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