The co-ordinates of the positions given in this section are relative to the coordinate system defined on the pin datum point XD, YD, ZD calculated in the previous section.
NOTE: D and E axes in correct orientation for change cycle (D0, E-90).
The following figure shows the maximum tolerance acceptable on the CMM drive path during the automatic change cycle.
Nominal CMM drive path:
The table below gives co-ordinates for the points in the automatic change cycle relative to the pin datum point XD, YD, ZD.
PHS-2 axis origin position relative to pin datum point XD, YD, ZD:
The following table gives the incremental values for the moves between points in the automatic change cycle:
Moves in automatic change cycle:
|A to B||Y||+150|
PHS-2 moves in (or out of) port without probe arm loaded
|B to C||X||-24|
PHS-2 latches (or unlatches) port with probe arm unlocked
|C to C1||Z||-104|
Arm locking move (load cycle only)
|D to C||Z||100|
Arm unlocking move (unload cycle only)
|C1 to D||Z||+4|
Locking mechanism backoff (load cycle only)
|D to E||X||+3.5|
PHS-2 latches (or unlatches) port with probe arm locked
|E to F||Y||-150|
PHS-2 moves in (or out of) port with probe arm locked