Loosing position after base alignment

[[Ja...]]

I am self-taught on the Zeiss Duramax and am having issues with finding the part.  I will run my manual alignment, then my base alignment runs, when I start measuring my part it is miles off and always somewhere different.  I will be off 500mm in X then do the exact same thing and be off -200 in X.  Is there something I could have done during my setup to cause this?

[[To...]]

One mistake I have observed when users have an issue like this is they mix working on the CAD model and probing points on the part before the base alignment has been completed. 

Test out the following routine.

Extract the feature used in base alignment from the model.

Assign the features to the base alignment.

Create your clearance planes (cuboid) 

Check your stylus and clearance plane assignments.

Run the program using a manual alignment. (Clear existing results must be checked)

If you want to run it again, choose the named alignment (3rd one down)

At this point, you could probe features on the part because the cmm now knows where the part is but I would recommend working from the model.

 

If you're not working from the model, avoid making edits on the base alignment features until after you've completed the base alignment process. You can corrupt features by editing them during the base alignment process.

 

You will probably need to start from scratch because it might be more difficult to fix the existing program.  Not impossible to fix but easier to re-do.

 

[[DW...]]

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 Does your base alignment have a 2d/3d line to control rotation?

[[Ma...]]

From description it's not well described, but here are some checks what should be done:

• using correct program alignment in autorun - you can check "manual alignment" before start to teach machine new origin instead of going into programming part of Calypso
• having stable base alignment features - for first alignment avoid using cylinders - better to use 2 circles and 3d line from their centers
• check nominals of features if they are correct

one tip for using cylinders in base alignment:

you have to setup start alignment with same origin as base alignment, just don't use cylinders - then you can select "start alignment" in base alignment list
I am not sure if you will perform base alignment with manual alignment checked, but in programming you can probe start alignment and then just run straight base alignment.
Explanation:

while start and base alignment is using almost identical features so their origins are same - so you don't need to probe both alignments, CNC will run base alignment from start alignment.