During the daily machining process, it is very common that the machining cannot
be completed within one working shift, and hence the DRO has to be switched
off, or less commonly, a power failure occurs whilst machining which leads to
loss of the work piece datum ( work piece zero position ). The re-establishment
of work piece datum using edge finder or other method inevitably introduces
machining inaccuracies, because it is not possible to re-establish the work piece
datum exactly at the previous position.
To allow the recovery of work piece datum very accurately, with no need to
re-establish the work piece datum using an edge finder or other methods, every
transducer has a reference point location to provide a datum point memory function.
The working principal of the ref datum memory function is as follows.
-There are a permanent and fixed mark (position) on the transducer,
normally called mark or point..ref ref
Since this point position is permanent and fixed, it will never change orref
disappear when the DRO system is switched off. Therefore, we simply need to
store the distance between the point and the work piece datum ( zeroref
position ) in DRO's memory. Then, in case of the power failure or the RD-11M being
switched off, we can recover the work piece datum ( zero position ) by presetting
the display zero position as the stored distance from the point.ref
to store the X axis work datum
function :
Example :
RD-11M provides one of the most easy-to-use datum memory function.ref
There is no need to store the relative distance between the mark and your work datumref
zero into the ,RD-11M whenever you alter the zero position of coordinate, such as by zeroing,ABS
centre find, coordinate preset or etc.., will automatically store the relative distanceRD-11M
between zero and the mark location into 's memory.ABS RD-11Mref
In daily operation, operator simply needs to locate the mark position whenever they switch onref
the to let it know where the mark position is, then will automatically do theRD-11M RD-11Mref
work datum storage on its' own . In the case of a power failure or the being switched off,RD-11M
the operator can recover the work piece datum easily by using the procedure.RECALL 0
Operation :
Distance between the
ref point and work piece datum
X axis mark positionref
( permanent and fixed )
work piece datum
( zero position ) After power failure, the work
piece datum (zero position) can
be recovered by presetting this distance
from the mark position.ref
- 6 -
glass grating scale
Resson
Technologies
