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Problems with aligning model and CAD=Part

Previously I have always transformed the model prior to any programming; however, I have decided to try Matt's method.

From the book of Matthew:

Try all of this:

Alignments:

First of all, to do ANY alignment, 3-2-1 or iterative, you MUST have XYZ values for whatever you use for the alignment.

Step #1
Do this no matter WHAT type of alignment you are going to do.
1) Place the part on the table the way it will sit for your inspection
2) Import your model data BEFORE you do any measuring
3) Using the CTRL-F3 option (3-D rotate), rotate the cad data until it matches the way the part sits on the machine, remembering that as you look at the screen you are looking DOWN on the machine
4) Once you have the cad data rotate (you are actually ONLY rotating the VIEW of the cad data), use F5 to open the setup options.
5) Go to the Part/Machine tab and while looking at the 3-D rotate cube, set your CAD to MACHINE axis
6) Click OK
7) Set your workplane to the ‘top’ of the cube (if the top, facing YOU face of the cube is X-, use the X- workplane)

.


When I complete step 6) the model flips back to it's original orientation. Should this happen? If I continue through the rest of Matt's steps for aligning it and then do a CAD=Part it is still misaligned like step 5) had no effect. I'm programming offline. Thanks in advance for any help.

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  • You should observe the probe in the graphics window - after a correct "F5; CAD axes <-> machine axes" the probe in the GW should be oriented (in relation to the part) the way you expect it to be oriented in the machine.

    I see no "CAD <=> Part" in Matthews instructions. If every feature has correct THEOs (clicked on CAD, or modified by hand) there's no need to do CAD <=> Part - it shouldn't change anything, anyway! If it does change anything it means something was wrong with your features, and the program is now (more or less) hosed.

    And I see only problems in transforming the CAD model. You do something undocumented to the original CAD, and then when the CAD model is updated you need to do exactly the same thing again. Every time. If you do "F5; Part to machine" correct, this information is visible and stored in the program, and importing a revised CAD model consists of just that: importing it - done!
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  • You should observe the probe in the graphics window - after a correct "F5; CAD axes <-> machine axes" the probe in the GW should be oriented (in relation to the part) the way you expect it to be oriented in the machine.

    I see no "CAD <=> Part" in Matthews instructions. If every feature has correct THEOs (clicked on CAD, or modified by hand) there's no need to do CAD <=> Part - it shouldn't change anything, anyway! If it does change anything it means something was wrong with your features, and the program is now (more or less) hosed.

    And I see only problems in transforming the CAD model. You do something undocumented to the original CAD, and then when the CAD model is updated you need to do exactly the same thing again. Every time. If you do "F5; Part to machine" correct, this information is visible and stored in the program, and importing a revised CAD model consists of just that: importing it - done!
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