Hi,
that is a substantial machine. Unlike Stuart I think it looks doable, the four driver boards along the top look like stepper drivers to me.
I could be wrong but there appears to be no encoder feedback cable that I would expect with servo drives. Can you post up close pics
of the axis motors?
The large board to the lower left looks like the spindle drive board. If we can work out what the spindle is it might be possible to reuse that
as well. Can you post pics of the spindle motor including the nameplate? Close up of spindle drive board would help.
The cost of changing to Mach4 will be largely dependant on whether existing motors and boards can be reused.
Is this machine for commercial use?. If so an industrial licence, $1400, is appropriate, add $600 for a PC and probably another $400 for an ESS
and couple of BoBs. About $2500 without changing any motors and/or drives...
Craig