Comparing previous results to current

[[Ev...]]

Happy Friday folks

I'm trying to compare X/Y positions of a circle from run to run. Is there a way to use a result element to pull data from the previous measurement and compare it to the data from the current? I'd like to see if there's shift from measurement to measurement, resulting in a slight skew in position callouts.

I have PCM but have literally never used it, so keep that in mind.

[[Er...]]

I typically do this task be dropping the results into excel and subtracting one actual from the other to see how much deviation there is between the two. Mostly because i don't have PCM and never thought to try and do this through the program. I suppose if you change all the actuals to nominals after the run, and then run the next part, you would get the results you're looking for, but someone who knows PCM would have to tell you how that would be done.

[[Jo...]]

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If you build a custom table report, enter formula to use measurement from (-1), to (-2) result etc.. Maybe add a field next to current dimension. You can extract those values by formula as well inside report. I don't have the time today to test it out,but there are math operations in template

measurement.JPG

[[Ma...]]

I am using curves for that.

[[Lo...]]

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I did this for years before we bought QC-Calc. Excel will work in a pinch.

[[La...]]

You can do this right in your StandardProtocol.ptx

For this example I have 2 parts I measured. I'm using the field Incremental Part Number and labeled them "Part 1" and "Part 2". I want to compare Part 2 against Part 1.

First show your sidebar if it's not already showing. The hotkey for this is F6 but you can also go to Navigation drop down -> Show measurement selection.

Then click on the little table button and go to Configure Measurement selection.

Turn on "Show measured values as deviation"

Then turn the function on in the sidebar. You'll see it's default behaviour is to switch to deviations from Nominal value.

You can then change this to from Reference Measurement and select any other measurement from your history to check against.

And you will see your deltas:

The only thing to consider is that when you apply changes like this in Monitor, they don't stick. If you like this functionality you would need to enable this on the Designer side and save the report so that this functionality is always showing up by default.

It's a lot of steps to repeat every time you need that functionality so maybe consider saving a copy of the report so this is turned on.