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« on: August 30, 2012, 11:07:48 AM »
I converted a Hardinge HLVH to CNC. I haven't done anything toward CSS but there are a couple of options. You could drive the spindle motor with a VFD or ,rather than changing the speed adjustment motor, wire in relays from your break out board to the 2 push button switches on the machine. If they are normally open switches(which they probably are) you could still leave those switches as functional at the machne control.
That leaves you with trying to figure out how to trigger the relays to control the speed. There are folks here that can help with that. I would be interested in that as well,though I probably will put a bigger 3 ph motor to drive the spindle and use the VFD that I use to drive my Bridgeport and other machines to drive the Hardinge. I have had issues with not enough power to the spindle with the original belt drive. Mostly a belt slippage issue. But it spoils a part and often a tool when it happens.