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Technical specifications Here you can find the technical specifications of Stork Veco's electroformed and photo-etched Encoder discs. For deciding what process your encoder-disc should be made with, please look at the tolerances and the maximum thickness of the disc. You can also choose for our "off the shelf" standard Encoder discs!         Electroforming   Photo etching   Examples: Thickness   Slot/bar width = thickness t = 0.025 mm - 0.100 mm   Depending on material and thickness.   0.09 mm barwidth / 0.05 mm thickness 0.12 mm barwidth / 0.10 mm thickness Tolerances -absolute -relative   0.010 mm 0.002 mm   0.020 mm 0.015 mm   See examples! Minimum bar width   Formula: 2t + 0.20 mm   Depending on material and thickness.     Maximum no. of slots   Formula: (pi * Di) / (4t + 0.40 mm) Di = inner diameter t = thickness   Depending on material and thickness.   < back Stork Veco's metal Encoders offers a lot of advantages.