Re: [CAD_CAM_EDM_DRO] CNC Grinding

Hi Doc:
No, not really.
Wheel wear mandates redressing of the wheel in any precision grinding
operation.
There is no way around this.
What happens when surface grinding, is that the wheel breaks down at the
corners first, (because the wheel is traversed incrementally across the job)
and the wear zone progresses across the face of the wheel until the whole
wheel face has lost its concentricity.
At that point, a redressing cycle is invoked to re true the wheel, the
absolute distance from reference face to wheel surface is recalculated, and
the program may be run again until the wheel is fully worn again.
Form grinding, by contrast, is characterized by breakdown of the most
delicate features of the wheel first, also typically the corners, even
thought the wheel does not usually traverse, it only plunges.
When the part registers as out of spec, the entire wheel form is reproduced
in the wheel, and the wheel is re-referenced as before.
Grinding processes are not characterized by slow loss of dimension of an
otherwise satisfactory wheel face, that can be compensated by changing the
relative positions of wheel and job...the characteristics of the wheel
typically deteriorate to the point that satisfactory cutting performance is
unattainable with the wheel face in its used condition.
Typically it's either wheel loading, (clogging) or wheel concentricity
breakdown and loss of desired geometry.
Hope this helps
Cheers

Marcus

----- Original Message -----
From: <docsys@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, February 16, 2004 11:35 AM
Subject: [CAD_CAM_EDM_DRO] CNC Grinding


> I am looking at setting up a grinder for CNC control and was wondering
> how to compensate for wear of the grinding wheel.
>
> Can the wear of the wheel be taken into account so the ground parts
> will have the same dimensions? If so, how can this be achieved?
>
> thanks
>
>
>
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