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BRIAN
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WY thanks for your question.
We do not need to use the indicator to see if it reads as advertised just push the feeler the correct amount and see if the dial agrees.
John. Yes the coax is indicating the null. The point is how wide is the null. On my indicator when the short feeler is used the dial is pushed by a Class One leaver of about 5 to1 ratio. so even when the in it's best mode. at zer0 diameter with the effort at 90° the accuracy is degraded by that amount.The longer the feeler the worse the result is
Brian
We do not need to use the indicator to see if it reads as advertised just push the feeler the correct amount and see if the dial agrees.
John. Yes the coax is indicating the null. The point is how wide is the null. On my indicator when the short feeler is used the dial is pushed by a Class One leaver of about 5 to1 ratio. so even when the in it's best mode. at zer0 diameter with the effort at 90° the accuracy is degraded by that amount.The longer the feeler the worse the result is
Brian