Most probably 1MF & 1MR.
This is a common assignment to Contactor 1 Motor Forward and Contactor 1 motor reverse, and is applied to a dual reversing contactor for probably the spindle motor in this case.
In general they are interlocked both electrically and mechanically.
Al.
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |