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Video P*r*o*b*i*n*g / 3d Probing on Granite slabs
« on: February 25, 2019, 02:34:48 AM »
Hello guys! I am Peter and I am stonemason and I use CNC mill for 90 percent of my jobs. I have read a lot of topics on the forum but none of them points me directly to solution of a problem:
My granite slabs are polished as glass and they are uneven on the surface. When I have to engrave a 100 or more letters on them I have to measure every two letters and make a separate toolpath in aspire or artcam. When i have a slab 1000mm on 2000mm and it has difference lets say 2mm from one side to the other and my letters are careved 2mm deep, I get no letters on the lower side and get bold (like offset) letters on the higher side of the slab. I can always try to make the slab even, but since they are polished I cannot calibrate them with a tool, because I have re-polish them after the lettering. The other way I tried is to make the slabs even by putting something under the lower part, but this also did not worked, because most of the slabs are cut and polished like and arc. So they have a "belly in the center. So I get a slab that is Z=0 in the center of XY, and Z=-2 in one corner, Z=+1 in the other, Z=+2 in the third and Z=-3 in the fourth corner.
I found that my only solution is a some kind of material flatness detection software and hardware like mach3 plugin plus a laser scanning or touch probe digitizing.
Can somebody tell me what to buy to solve this problem, that I have been struggling for a long time. Thank you all in advance.
My granite slabs are polished as glass and they are uneven on the surface. When I have to engrave a 100 or more letters on them I have to measure every two letters and make a separate toolpath in aspire or artcam. When i have a slab 1000mm on 2000mm and it has difference lets say 2mm from one side to the other and my letters are careved 2mm deep, I get no letters on the lower side and get bold (like offset) letters on the higher side of the slab. I can always try to make the slab even, but since they are polished I cannot calibrate them with a tool, because I have re-polish them after the lettering. The other way I tried is to make the slabs even by putting something under the lower part, but this also did not worked, because most of the slabs are cut and polished like and arc. So they have a "belly in the center. So I get a slab that is Z=0 in the center of XY, and Z=-2 in one corner, Z=+1 in the other, Z=+2 in the third and Z=-3 in the fourth corner.
I found that my only solution is a some kind of material flatness detection software and hardware like mach3 plugin plus a laser scanning or touch probe digitizing.
Can somebody tell me what to buy to solve this problem, that I have been struggling for a long time. Thank you all in advance.