Re: Quality assurance for CNC programs - Help needed.

On Wed, 10 May 2006 00:55:39 GMT, "John R. Carroll"
<jcarroll@xxxxxxxxxxxxxxxxxxxxx> wrote:

Eric Stevens wrote:
On Tue, 09 May 2006 20:51:54 GMT, "John R. Carroll"
<jcarroll@xxxxxxxxxxxxxxxxxxxxx> wrote:

Eric Stevens wrote:
On Tue, 09 May 2006 19:30:54 GMT, "John R. Carroll"
<jcarroll@xxxxxxxxxxxxxxxxxxxxx> wrote:

Eric Stevens wrote:
I'm a professional engineer who knows just enough about CNC
programming to be dangerous.


I would be grateful if somebody could point me to relevant
Standards or Code of Practice documents, or the like, if any
actually exist.

Thanks in advance

Eric Stevens



Eric,
The CE safety standard is what you are looking for. Look over mode
4.

I do have some CE documents. Could you tell me which one you have in
mind?


I'll look and give you a specific reference. You have answered the
question at hand in another part of this thread. You can clamp
spindle RPM on a tool by tool or global basis on any Fanuc later
that an 11M. Unless the tool in question was being moved from one
location to another or the code reinitialized the tool changer,
preventing this sort of an accident is as easy as water flowing down
hill.


That applies in most cases but the tool concerned was that of an empty
pot used by the program to allow manually loaded tools. No single
speed limit was suitable for all. The speed for the particular tool
was loaded in the program into a parameter the programmer did not
realise could be cleared by the RESET key. (It wasn't cleared on their
other Fanuc CNC machines in which #1003 was set differently).


I see.
It still would have been possible to limit the RPM of that tool to
say 300 or something less hazardous but only if you used it in the same
position each time. No matter.

I have an offline solution that addresses this sort of thing. It translates
your parametric macro's to NC code and you can check and run that without
worry.

Thanks for the offer but that particular problem has already been
attended to. I'm more concerned about establishing proper procedures
so that kind of thing cannot happen again. Hence my enquiries about
codes, standards etc.



Eric Stevens

.

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