Advice Needed, Converting a Boxford VMC 190

[m100]

Comparing my 190 to the Boxford 160 lathe that uses a similar stepper driver board as the 190, and a similar MW Controls processor board underneath (in the case of the 160 the steppers are assigned to the x axis, the z axis, and the turret for the lathe toolpost toolchanger rather than X Y Z for the 190).

The Bradford instruments board is possibly also a limit switch interface, the ribbon cable is labelled PL1 fast serial link at its connection to the main processor board and contains very similar components to the main processor board. Comparing the photos of my machine (without a toolchanger) to yours I have a total of 5 wires and a loop on the orange connector, you only appear to have two. Where you have two white wires I have an orange and purple connected to CL5 and CL6 respectively on CONN1 on the stepper board. Suspect these are the clock and direction for one axis.

The additional wiring I have, a 3 core small diameter cable eventually goes through a conduit that leads, I think, to the motor head. That PCB also carries three LEDs L1,L2, L3 attention, limit plus and limit minus respectively.
I suspect these are may be the Z limits, the wiring looks the same as the x and y limits and yours does not have a z limit switch or it does it is implemented in a different way.

Below is a photo of the connector between the processor and the stepper board, at the stepper board end, with the two wires on the end that go to the standalone bradford instruments board

The underside of the stepper board has a factory fitted 'bodge wire' to connect CL6 to pin 6 (step) on the GS-D200S stepper drive on the Z axis. Given that the stepper board is 'universal' there might be some confusion about the allocation of the pins and the silk screen.

The terminal assignments for the 190 should, I think, be as follows:

xd = x direction
xc = x clock
zd = y direction
zc = y clock
cl5 = z direction
cl6 = z clock