CAD CAM EDM DRO - Yahoo Group Archive

Re: Newbie - Help & Clarifications

Posted by Fred Smith
on 2005-08-25 16:06:13 UTC
--- In CAD_CAM_EDM_DRO@yahoogroups.com, "David A. Frantz"
<spinwizard@f...> wrote:
> Fred Smith wrote:

> >In the not so distant past, many machining centers and turning
> >centers were shipped fully enclosed, and with door interlocks
that
> >prevented access to tool, part, and/or fixtures. There was
little
> >if any provision for view ports into the enclosed machine
workspace.
> >
> >
>
> As far as I know they still come this way.

Yes, many do, but now the controllers have a setup mode which allows
the spindle to be used in setup mode. There are also the "toolroom"
lathes and mills, which are not fully enclosed, and are still
considered safe.

> >That is they could only be used with preset tools as there was no
> >method provided for a setup person to use simple tool touch
> >techniques to set tool length and work offsets. No accomodations
> >were provided to use edge finders for example, to set part zeros.
> >
> >
> That is an issue and accomodations can be made for zeroing out
tools.
> In any event those tools are enclosed for a number off reasons.

Mostly CYA related to lawyer, insurance and darwinism costs.

> >Few production or tool shops left the interlocks in place as it
was
> >impossible to use the machines for any but strictly dedicated
> >production jobs.
> >
> >
> That is the excuse that I hear from a number of people.

It is not an excuse. There was a whole generation of American
machine tools that were unusable.

>Usually the
> same people that have war stories about getting injured on the job.
>
> >These machines were a combinaiton of paranoid safety reactions
and
> >lousy/inadequate controller design. The legal environment left
few
> >options available to US machine builders. This was a major cause
of
> >the failure of the US machine tool industry between 1980 and 1995.
> >
> >
> Fred; I find your post in these forums interesting to read but I
believe
> you went of the deep end here. The safety devices where put in
place
> due to real accidents that often maimed the person being
injured.

Nope.

> All importers have to conform to the same safety regulations as
the
> domestic manufactures.

Absolutely not, they have to conform only to the extent that they
have deep pockets, within the importing country.

>In any event this makes no sense due to the
> very stringent regulations in europe. Often European machines
come
> in to the country with far more tought put into safety than the
domestic
> brands of that era.

Yes and they were pricey as well. Unless you are thinking of East
European machine tools, which were another story.

Fred Smith - IMService
http://www.cadcamcadcam.com/hobby

Discussion Thread

biswanath55 2005-08-23 20:47:59 UTC Newbie - Help & Clarifications Jim Peck 2005-08-24 03:00:16 UTC RE: [CAD_CAM_EDM_DRO] Newbie - Help & Clarifications Fred Smith 2005-08-24 05:54:30 UTC Re: Newbie - Help & Clarifications wanliker@a... 2005-08-24 09:39:19 UTC Re: [CAD_CAM_EDM_DRO] Re: Newbie - Help & Clarifications Lance Hopper 2005-08-24 11:50:02 UTC Re: Newbie - Help & Clarifications Blue 2005-08-24 15:21:20 UTC Re: [CAD_CAM_EDM_DRO] Newbie - Help & Clarifications caedave 2005-08-24 16:30:32 UTC Re: [CAD_CAM_EDM_DRO] Newbie - Help & Clarifications Blue 2005-08-24 18:24:54 UTC Re: [CAD_CAM_EDM_DRO] Newbie - Help & Clarifications caudlet 2005-08-24 21:03:53 UTC Re: Newbie - Help & Clarifications Andrey Lipavsky 2005-08-24 21:20:44 UTC RE: [CAD_CAM_EDM_DRO] Newbie - Help & Clarifications caedave 2005-08-25 01:39:14 UTC Re: [CAD_CAM_EDM_DRO] Newbie - Help & Clarifications Abby Katt 2005-08-25 06:07:51 UTC Powerdump relay (now with free arcwelding) turbulatordude 2005-08-25 06:16:00 UTC Re: Newbie - Help & Clarifications - Home and Limit Swtiches Les Newell 2005-08-25 06:20:06 UTC Re: [CAD_CAM_EDM_DRO] Powerdump relay (now with free arcwelding) Andy Wander 2005-08-25 06:33:35 UTC RE: [CAD_CAM_EDM_DRO] Powerdump relay (now with free arcwelding) lcdpublishing 2005-08-25 07:25:54 UTC Re: Newbie - Help & Clarifications - Home and Limit Swtiches John Johnson 2005-08-25 07:52:53 UTC Re: [CAD_CAM_EDM_DRO] Powerdump relay (now with free arcwelding) caudlet 2005-08-25 08:35:07 UTC Re: Powerdump relay (now with free arcwelding) David Speck 2005-08-25 09:37:02 UTC Re: [CAD_CAM_EDM_DRO] Powerdump relay (now with free arcwelding) David A. Frantz 2005-08-25 10:15:34 UTC Re: [CAD_CAM_EDM_DRO] Newbie - Help & Clarifications Fred Smith 2005-08-25 12:42:24 UTC Re: Newbie - Help & Clarifications David A. Frantz 2005-08-25 14:21:25 UTC Re: [CAD_CAM_EDM_DRO] Re: Newbie - Help & Clarifications Fred Smith 2005-08-25 16:06:13 UTC Re: Newbie - Help & Clarifications lcdpublishing 2005-08-25 17:04:12 UTC Re: Newbie - Help & Clarifications wanliker@a... 2005-08-25 17:07:27 UTC Re: [CAD_CAM_EDM_DRO] Re: Newbie - Help & Clarifications wthomas@g... 2005-08-26 20:47:00 UTC Re: [CAD_CAM_EDM_DRO] Newbie - Help & Clarifications