Hi
Alignment of stations usually take more time than setting up a tool. So you should use the tool align key when you are doing so.
In case you want to turn hydraulic unit off while setting up a tool.
1-You are preventing oil cooling process in off time.
2-And specially in some models that the hydraulic motor is not starting by star-delta method, the shock of every stop-start is higher than you think!
Simply as Amada advised keep ToolAlign key at off position .
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Good luck,
M.R. Norin