Iterative Alignment Problems

[Tammie Godden]

Hi All



I am trying to align a fixture, using iterative alignment. I have done this 100's of times with no problems. This time, however, I am having trouble. When I am finished with the alignment, it is WAY off. pretty good in the Y axis, but about 100 mm low in the Z axis, and about 100 mm forward in the X axis. I have double checked my probe build, it is correct. Any other suggestions?

[bob mappes]

Try posting your alignment here and let us take a look at it.

[Jeffrey Lovely]

check tooling ball noms
tb's may also have been labled with wrong noms
change some numbers that may work & try best fit
see if it starts to get better

[Tammie Godden]

A0 =ALIGNMENT/START,RECALL:STARTUP, LIST= YES
ALIGNMENT/ITERATE
PNT TARGET RAD = 5, START LABEL = , FIXTURE TOL = 0, ERROR LABEL =
MEAS ALL FEAT = ALWAYS ,MAX ITERATIONS = 99 ,LEVEL AXIS=ZAXIS ,ROTATE AXIS=XAXIS ,ORIGIN AXIS=YAXIS
LEVEL = SPH1,SPH2,SPH3,,
ROTATE = SPH2,SPH1,,
ORIGIN = SPH2,,
ALIGNMENT/END

I have double checked all of the above. The fixture/TB/alignment has worked fine as I said about 100 other times. I don't get it...

[Jeffrey Lovely]

what are the nominals for the tooling balls
could it be missing a negative number or vise versa
do you have scribe lines on the gage
are the distances correct from edge or scribe line
use calipers for rough reading

[Tammie Godden]

I checked all this and more. I just ended up mirroring the part program, and using an existing alignment, all is well. PCDMIS glitch, I guess It is exactly the same in every way as the one I was trying to use. I don't know...

[Paul Sarrach]

Worse comes to worse, in the future. And it will. Start over. I have done that with success before.

[Jeffrey Lovely]

pc demons - be gone

[Jeffrey Lovely]

did you shut down and reboot
that works sometimes

[Aguayo]

You can also do a manual long way alignment just to verify,Where youcan first Measure a feature then level then measure the features(feature) for your rotation then rotate then crate the Origen,just another way to verify your previous alingment.

[A Disho]

reply

Try to have sphere # 3 as origin , or ask fixture builder if the have the z plane , as -z , z plane direction is from up to down