G-Code Sequence Error

What does PS0049 mean?

This alarm indicates an incorrect sequence of G-codes related to coordinate rotation (G68, G69) and tool length compensation (G43, G49). It typically occurs when tool length compensation cancellation (G49) is commanded out of sequence with coordinate rotation cancellation (G69) while tool length compensation (G43) is active, leading to an logical conflict in compensation states.

1. 1

   Review the NC program blocks around the alarm point, focusing on the sequence of G68, G43, G49, and G69 commands.

2. 2

   Ensure that the cancellation of tool length compensation (G49) occurs before the cancellation of coordinate rotation (G69) when G43 is active.

3. 3

   A correct sequence typically involves G68, then G43 H1, then G49, and finally G69. Adjust the program to match this order.

4. 4

   Note that commands like G28 (tool length compensation cancellation) can cancel the offset within G68 mode without causing this specific alarm.