hi friends
where i can find fanuc calibration grids for print ?
Need irvision calibration grid
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amir65esf -
November 22, 2016 at 9:25 AM -
Thread is marked as Resolved.
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Here is a large one I made because the fanuc ones were not large enough for me.
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I remember hearing something about people having issues when printing out their own grids. Apparently some printers would not keep equal spacing in both directions for some reason. They suggested as a way to check for correct spacing-print out 2 grids, and then rotate one 90 degrees and then lay it over the other. Hold it up to light, and check that all of the grids line up, if for some reason they don't the printer is skewing the spacing for some reason.
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I remembered where I saw the info about printing out calibration grids. It was posted on the iRVision forum on Fanuc's cRc site by someone from Fanuc. You need access to the cRc site to even get to the forum, and it hasn't been around very long so there is not much activity there, at least not yet. One of the really nice things about it is the fact that Fanuc engineers seem to post pretty regularly in response to questions. Anyways here is a hit list posted on there in response to someone asking about printing out their own grids.
Please following these guidelines when printing a custom calibration grid.
•The ratio of the diameters of the large and small circles needs to be approximately 1.414 to 1, so that the ratio of their areas is approximately 2:1.
•The spacing of the circles has to be accurately uniform in both directions. We had trouble getting them manufactured accurately at first, as printing equipment tends to have a slight difference in the horizontal and vertical scaling. The easiest way to check this is to make 2 copies of your grid, place one on top of the other rotated 90 degrees, hold them up to the light, and see if the circles are exactly aligned. If you can’t get both the first and last circle in a row to line up at the same time, scale the drawing by a small amount in one direction and try again.
•Measure the circle spacing with a ruler to make sure that it is accurate. Measure from the left side of the first small circle to the left side of the last one in a row and divide by the number of circles in the row for best accuracy.
•It is a good idea to print the circle spacing in mm on the grid for reference.
•Make sure that a printed grid is held as flat as possible by gluing it to a piece of plastic, stiff cardboard, or sheet metal.
•The actual value of the circle spacing relative to the circle sizes is not important, as long as the large circles appear at least several pixels apart in the image.
•There should be enough small circles so that the field of view of the camera contains circles from edge to edge both horizontally and vertically.
•The placement of the large circles does not matter. This just sets the origin, and you can place it wherever is convenient.
•Make sure that the L pattern is not mirror reversed. The row of 3 large circles is along X and the row of 2 large circles is along Y.
•The small white circles in the center of the circles are not necessary, but do not affect the calibration software. They were placed there to facilitate teaching a robot frame manually with a pointer.
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Thanks for the heads up on that forum, I did not know it was here.
Anyway I signed up but as of right now I still have (No Access) on all topics. I'm sure it will get resolved soon.
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Thanks for the heads up on that forum, I did not know it was here.Anyway I signed up but as of right now I still have (No Access) on all topics. I'm sure it will get resolved soon.
I do recall having to wait to gain access as well. IIRC the next day I had access.
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Here is a large one I made because the fanuc ones were not large enough for me.this is so big !!
i need c to c 20mm -
Cad drawing
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I need a Fanuc calibration grid for 3DV of 22.5mm size plate.
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Call fanuc and order this kit VO-1800-023
It has about 6 different size grids.
I think the kit is around a 100 dollars