Sunday, May 19

Sieg SC4 Mini-Lathe!   (and a new project)

I (finally) bought a (slightly) used Sieg SC4 Mini-Lathe!   

I installed the machine beside my milling machine until my new workshop is ready next year.   I spent the last weekend drawing & 3D Printing various lathe tools support in order to have a tidy setup for all the tooling.

I’m planning to convert the mini-lathe to a CNC lathe in the near future.  I already started to shop around for various parts in order to establish a preliminary budget

  • 2 x Nema 23 Stepper (279 oz/in), dual shafts so I can still manually operate the machine
  • 2 x 4.2A @ 50VDC stepper drives
  • 36V Power supply
  • 1204 ballscrews for X/Y
  • Allow for a future tool turret (ATC) prob. Nema 17 + few inputs
  •  Encoder on the spindle (rigid tapping)
  • MESA 6i25 + 7i76
  • LinuxCNC
  • An old 2 core computer running LinuxCNC

I’ve decided to try LinuxCNC for the lathe.  The main reason for this is the fact that I find that Mach4 is too ‘closed’ : You can’t integrate your own hardware in the core of Mach4 unless you get an NDA + dev kit from them.  The other reason is I didn’t want to buy another ESS SmoothStepper that is locked to Mach4 (no LinuxCNC support).


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