Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready?

Another thing being over-looked is the type of materials for each. Acme screws are soft and generally not heat-treated at all, ballscrews are case heat treated to 65-72 rockwell and then precision ground to tolerance.. Like comparing cold rolled rod and Thompson shafting. There is no comparison other than they are both round.

Ron

"C.S. Mo" <cs@...> wrote:
I think that what both of you are missing is that the rated life is
Inches of Travel at Maximum operating load. At no load, or virtually no
load, there is virtually no wear.

So if you figure a 1" ballscrew has an operating load of 1,650lbs (RBS,
which is pretty typical), your average CNC Conversion machine probably
almost never sees full load, or even anything close to it.

--C.S.

>--- In CAD_CAM_EDM_DRO@yahoogroups.com, "lcdpublishing"
><lcdpublishing@...> wrote:
>>
>> So, using that information you are providing.....
>>
>> Let's assume (Nasty word isn't it), that we will traverse 20" every
>> minute in a production machine.
>
>I suggest you google "ball screw life" to understand the concept, then
>you won't have to assume anything.
>
>Fred Smith - IMService
>http://www.cadcamcadcam.com/hobby

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