Automatic Calculation

[[Me...]]

How do you guys feel about the accuracy of Automatic Calculation for the speed of an RDS XXT head?

[[To...]]

To me, if you have all of the feature's characteristics already created, the calculate button seems to reasonable and in some cases, very close to what the cookbook suggests. The key is to have all of your characteristics in place first.

That being said, I haven't used it in a while since cookbook came out. The Cookbook is quite conservative, so you may be able to "speed" things up with very little impact on the results. In other words, if you're trying to hole ±.005, what does a couple of "tenths" matter? (I can hear metrologist everywhere shaking their heads now.) On the other hand, if your tolerance is ±.0001, then conservative is probably what you want.

I did a test of measuring a 20mm dia circle on the Y axis. I used 5mm per second (from Cookbook), and 10, 15 and 20. I used the #2 (A90 B-90) +Y probe on a Contura 2014 RDS-XXT and the #2 +Y star probe on DuraMax XXT, 10, 15 and 20. I consistently got less than a 1 micron difference. Your results may differ. The odd thing was I got less than 2 micron difference on a Contura Aktiv. I would have assumed the opposite. Good enough though, right?

[[Me...]]

Wide open tolerances is the entire reason I asked.

Thanks Tom!

[[Ka...]]

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The auto-calculated values are usually pretty close to what I manually decide, also. In general, the lighter a stylus system, and better the part finish, the faster one can scan.