Re: [CAD_CAM_EDM_DRO] Re: Electronic Lead Screw Drive Article ?

>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:
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>>I don;t think this device, as it stands, would be useful for Imperial
>>threading.
>>It was aimed at standard metric threads, where a very limited number
>>of ratios will suffice. It could probably be expanded on to give most
>>of the standard
>>imperial threads. But, 11, 13 and 27 would be a problem, for sure. I'm
>>not sure it actually has a limitation to even ratios, but I thought it
>>might.
>>
>>Also, I'm not sure what happens if you stop the spindle, or open the
>>halfnuts and have to move the carriage. I guess that would be the same
>>problem as with standard threading gear systems, you have to sync the
>>carriage to the leadscrew with the threading dial, and the thread pitch
>>determines which marks you can use.
>>
>>Jon
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>Well, if one can print plastic encoder wheels on a laser, then one can
>make their own verson of change gears ! And at a price a whole lot
>less than the cast iron ones.
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