This value establishes a threshold above which the user will be given a warning and be forced to acknowledge that the position indicated in a status request is significantly different from the previous table position. A value of 0.0 disables this warning message. This can be used to warn of table position drift that can cause inaccurate measurement results. This can also provide a warning for improper table response in the case where a move response is given before the table has completely settled into a stable position and a following status request then receives a different position in its response.
Entry Name: ExternalRotabDriftWarnDiff
Entry Type: Real Number that specifies the threshold distance. The default value is 0.001.
This value does not apply in the case where the table is taken out of auto mode and the table is rotated manually using the control panel. It only applies while in auto mode and therefore the user can have drift warning enabled but can manually move the table while PC-DMIS is running without getting the position drift warning message.