Total runout help

Total runout:

-Chuck onto the datum
-Rotate the part
-While rotating, put an indicator on your surface of evaluation. Record the DEVIATION (highest positive & highest negative) in multiple cross sections. Do the math & report it out.

Math for TOTAL runout:
-Distance between highest deviation & lowest deviation REGARDLESS of what cross section the deviation comes from.

In the above example...highest positive deviation recorded is +0.002 and highest negative deviation recorded is .001...the distance between those values is 0.003.

0.003 is your total runout.

To do this on a CMM:

Legacy-->
-Measure both features as cylinders
-Level to -A- and make -A- an origin...report total runout of evaluation surface back to -A-

Xact/Geotol-->
-Measure both surfaces as cylinders
-Define surface as Datum -A- using DATDEF command
-Using feature control frame builder...report total runout of evaluation surface back to -A-

Hope this helped...Sorry I suck at drawing

Total runout:

-Chuck onto the datum
-Rotate the part
-While rotating, put an indicator on your surface of evaluation. Record the DEVIATION (highest positive & highest negative) in multiple cross sections. Do the math & report it out.

Math for TOTAL runout:
-Distance between highest deviation & lowest deviation REGARDLESS of what cross section the deviation comes from.

In the above example...highest positive deviation recorded is +0.002 and highest negative deviation recorded is .001...the distance between those values is 0.003.

0.003 is your total runout.

To do this on a CMM:

Legacy-->
-Measure both features as cylinders
-Level to -A- and make -A- an origin...report total runout of evaluation surface back to -A-

Xact/Geotol-->
-Measure both surfaces as cylinders
-Define surface as Datum -A- using DATDEF command
-Using feature control frame builder...report total runout of evaluation surface back to -A-

Hope this helped...Sorry I suck at drawing