as many years as I have been doing this I have only once calibrated a disc styli and that was about 1 year ago. (I was told we need a ring gage instead of a calibration sphere)
can anyone direct me to some info on this.
thanks in advance
calibrate a disc styli
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medupriest
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Re: calibrate a disc styli
With DCC machines, a calibration sphere is suitable for the calibration. With Manual systems, you can set up a CAL-ring from the Probe ribbon tab.
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myork1967
- Nikon
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Re: calibrate a disc styli
ok thank you
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myork1967
- Nikon
- Posts: 51
- Joined: Wed Mar 14, 2012 10:29 pm
- Location: Christopher, Illinois
- Contact:
Re: calibrate a disc styli
what is the max form error acceptable on the calibration?
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medupriest
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Re: calibrate a disc styli
That kind of depends on the machine and configuration.
What kind of form error are you getting and what do you get with a regular spherical stylus?
You can do some tests to see what the issue is.
If the stylus is tight and a length that is suitable for the strength of the module (if you are using TP20)(send a picture of the assembly if you are unsure) then you can try measuring 20-30 points on the ring gauge and then go to the feature database tab, right-click on the circle, and select "create form error graphical report".
If the high and low spikes are randomly displaced, the issue could me machine motion in general (error map/encoders/tuning reader heads).
If the high and low spikes follow a pattern (high and low every 60°, elongation along one axis or another), then you may be able to figure out what the issue might be from that pattern.
What kind of form error are you getting and what do you get with a regular spherical stylus?
You can do some tests to see what the issue is.
If the stylus is tight and a length that is suitable for the strength of the module (if you are using TP20)(send a picture of the assembly if you are unsure) then you can try measuring 20-30 points on the ring gauge and then go to the feature database tab, right-click on the circle, and select "create form error graphical report".
If the high and low spikes are randomly displaced, the issue could me machine motion in general (error map/encoders/tuning reader heads).
If the high and low spikes follow a pattern (high and low every 60°, elongation along one axis or another), then you may be able to figure out what the issue might be from that pattern.