Baldor top cards with the green or orange 7 segment LED have a 16 way IDC header which 'taps' into the step and direction signals for axis 0,1,2 and 3
This means that any, or all of the axes can drive external stepper drives rather than the 3 fitted to the base board.
NB, Some earlier RS232 only nextmove ST boards didn't have the connector fitted, just soldered holes.
Information and questions about Denford CNC Control electronics, general electrical issues, cables, diagrams, stepper motors, drives etc...
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