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回复: 【转帖】Alignment Update Question
Well, yes and yes......
If you do a 3-2-1 alignment, you MUST do CAD=PART if you are using cad data to program (I do it 100% of the time, with or without cad)
Now, this is the most common time I would change the 3-2-1 alignment:
I get a holding fixture in. I align by the numbers ON THE BASE
I do a DCC alignment, using the same touches as the manual alignment I did.
I will then (ALWAYS!) check the fixture locators to make sure that they check within fixture tolerance (generally less than 0.05mm / 0.002"). If so, then my alignment is done.
IF THEY ARE NOT in tolerance, I will adjust the offset values in the alignment (right in the EDIT window) ONLY for the alignment made from the DCC features. The locator check features are already in the program and are AFTER the alignment. They are TO CAD DATA and they need to stay that way, so when (IF) I tweak the offset values, I TELL IT NO DO NOT UPDATE.
I will then run the DCC alignment and check points to see if they are all in tolerance now. I usually get it with one adjustment, but if the locators are on wierd angles, it may take more than once. Each time I adjust the offsets, I TELL IT NO.
Once I finally get all the locators in tolerance and I have made my last tweak YOU THEN MUST DO CAD=PART AGAIN or any new point you pick off the cad will reflect the amount you shifted (or changed) the offsets in the alignment. AND, in V3.7 MR3 I have noticed that you MUST DO THIS TWICE to get it to 'be right'.
Matthew D. Hoedeman |