Yet another Denford for the collection (Triac Retrofit thread)

[m_c]

Rather than have this thread as just another "look at what I got/done" thread, I'm wanting to explain some of the reasoning behind the choices.
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Denford use pretty industrial type setups for their electrics, so all the control electrics in this machine already run 24V, which I'll be sticking with, as 24V controls pretty much eliminates all noise problems. (If there is demand I'll go into the details of the why higher voltage is better)
This particular machine is a VMC version (basically means it comes with inbuilt computer/display/keyboard), running stepper motors courtesy of a parker SD rack.
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Here's a few pics.
Original control cabinet setup-

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It powers up!

Check the whopping 1024kb of memory and 33MHz clock speed :-)
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I love old school tech-

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Now that's how it came. Cutting edge technology for the early nineties, and would likely still work if I could be bothered finding a working floppy disk drive to create a new floppy disk. But I need this machine working, not stuck running archaic software/hardware.
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In an ideal situation, I'd install servos, however I don't have the budget or time to rework everything to fit servos.
Instead, I'm going to stick with the original steppers for now, and using modern drivers.
I've opted for Leadshine EM806s. A lower end drive would also of worked, but I want to make this machine as reliable as possible, so the stall-detection of the EM drives gives an extra bit protection should something go wrong.