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b) some kind of box to interface the driver box to the computer (i.e. I think, USB to parallel something)
WARNING almost all manufactures off Software and a good numbers of those making Hardware controllers warns that USB-2-Parallel Port Converters DO NOT work as they should in this application !!!!
Your post was timely. I've been looking at such things. Does the same hold true for the ethernet version of smoothstepper?
This all sounds too easy.
Machines: Sherline Manual Workshop package with rotary table upgraded for CNC. This allows me to play/learn the machines while I play/learn the CNC components.CNC Retrofit: Motor mounts, motors, lead screws. The question is whether to choose Sherline’s standard steppers or high-torque steppers (almost $50 difference a piece). Seems the standard steppers are sufficient or I can start with standard and replace those motors that need more torque. Will not get ball screws at this time (pricey!)Power Supply: I have a 20A, 0-24V supply.CAM: CamBam (Linux or Windows). The question is what else (free or cheap) is available. Must support lathe and mill. If Windows base can move output to a Linux based machine.One thing I just realized...The above means I have to swap the driver between the lathe and mill. I have to noddle on that.This all sounds too easy.
I believe Mach3/4 is Windows only. True? Mach3/4 has a small cost. Mach3 is stable but appears no longer supported. Mach4 appears to be fairly new and was not built on Mach3 (i.e. very different code). Mach4 appears to be under significant development and documentation may be lacking.
I'm not sure what you mean by "upgraded for CNC" and then mention "CNC Retrofit". If the intent is to use the Sherlines manually, I don't think their CNC ready machines can be used manually. At least without some hand wheel adapters.I built up a 50V unregulated power supply for my G540. I don't remember the trade off for voltage and/or unregulated. Hopefully someone will let us know. But 24V seems low.