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Calibration plate calibration...

pab39
Hi,

We have an Optiv 321GL-TP, and since the beginning we are calibrating probes every week, but also the camera with the glass plate (you know, the one with rectangles and circles).
For the probes i'm pretty sure it's necessary, but what about the camera ? how often do you check it guys ?
This give rise to another question: does the calibration features (sphere/ring and glass plate) has to be verified periodically ?

Thanks.
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  • JEFMAN pretty much covered it.

    You do not need to calibrate the optics very often. There are two reasons you would want to calibrate with any regularity:

    1. You crash the machine and have to physically alter the camera.
    2. you do a lot of min/max magnification settings within your programs.

    The biggest difference between the camera and probe is the probe in mechanical where the camera isn't. Since there is force being applied to the probe it has to be re-compensated periodically. Since there is no physical force on the camera, it's less necessary. (again, unless you do a lot of mag in/out.)

    The offsets should be done regularly, depending on your tolerances, i'd say once a week as a rule-of-thumb.

    Regarding the artifacts...there's no reason for them to be calibrated. They are simply a known value. Unless you drop them, break them, expose them to extreme temperatures, there's no real reason to worry that they have changed. I have seen plenty of customers send them out for calibration or do them in house...that's your decision but it's not really necessary.
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  • JEFMAN pretty much covered it.

    You do not need to calibrate the optics very often. There are two reasons you would want to calibrate with any regularity:

    1. You crash the machine and have to physically alter the camera.
    2. you do a lot of min/max magnification settings within your programs.

    The biggest difference between the camera and probe is the probe in mechanical where the camera isn't. Since there is force being applied to the probe it has to be re-compensated periodically. Since there is no physical force on the camera, it's less necessary. (again, unless you do a lot of mag in/out.)

    The offsets should be done regularly, depending on your tolerances, i'd say once a week as a rule-of-thumb.

    Regarding the artifacts...there's no reason for them to be calibrated. They are simply a known value. Unless you drop them, break them, expose them to extreme temperatures, there's no real reason to worry that they have changed. I have seen plenty of customers send them out for calibration or do them in house...that's your decision but it's not really necessary.
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