John, how did you pull that mold so cleanly??
Ralph
On Tue, Dec 17, 2019 at 6:23 PM John Dammeyer <
johnd@...> wrote:
I'm working on that concept.? I still think that it will be either a Raspberry Pi or a BeagleBone Black since running LinuxCNC (MachineKit) under the covers is the nicest solution to creating an ELS that with the flip of a switch so to speak is also full CNC.
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However, I don't know, and until I have LinuxCNC on a lathe I won't know, if you can manually turn the spindle by hand and have the lead screw track.? If that's a critical point for end users they are better off to stay with the hi res encoder generating step pulses to the lead screw.
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Where that feature is really useful is when you want to mount something threaded back in the lathe and line up the cutting tool with the existing thread.? I've done that with my ELS by using the compound to tweak where the tool appears to be as it makes a pass.? Done without the tool engaging in the thread it's pretty easy to get it close.? But precise probably not.
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And there's so much backlash in my half nut that rocking the spindle back and forth will snap the edge of a carbide insert in a heartbeat as the spindle moves but the lead screw doesn¡¯t? Even with backlash compensation.
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John
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You obviously have a lot of expertise John. Is it possible you could adapt your design to the new possibilities that have emerged in the 14 years since your initial creation?? ?
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Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer
