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
ref
mark or
ref
point..
Since this
ref
point position is permanent and fixed, it will never change or
disappear when the DRO system is switched off. Therefore, we simply need to
store the distance between the
ref
point and the work piece datum ( zero
position ) in DRO's memory. Then, in case of the power failure or the SC-100 being
switched off, we can recover the work piece datum ( zero position ) by presetting
the display zero position as the stored distance from the
ref
point.
to store the X axis work datum
function :
Example :
SC-100
provides one of the most easy-to-use
ref
datum memory function.
There is no need to store the relative distance between the
ref
mark and your work datum
zero into the
SC-100
,
whenever you alter the zero position of
ABS
coordinate, such as by zeroing,
centre find, coordinate preset or etc..,
SC-100
will automatically store the relative distance
between
ABS
zero and the
ref
mark location into
SC-100
's memory.
In daily operation, operator simply needs to locate the
ref
mark position whenever they switch on
the
SC-100
to let it know where the
ref
mark position is, then
SC-100
will automatically do the
work datum storage on its' own . In the case of a power failure or the
SC-100
being switched off,
the operator can recover the work piece datum easily by using the
RECALL 0
procedure.
Operation :
Distance between the
ref point and work piece datum
X axis
ref
mark position
( 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
ref
mark position.
glass grating scale
- 6 -
Summary of Contents for Premium SC-100
Page 2: ......
Page 8: ......
Page 13: ...5...
Page 17: ...9 sdm 3 3 sdm 2 2 sdm 4 4 ABS sdm 1 1...
Page 26: ......
Page 28: ......
Page 33: ...25...
Page 38: ......
Page 39: ...31...
Page 47: ...39...
Page 53: ...45 R R R...
Page 69: ...61 R R R...
Page 86: ......
Page 87: ...79...
Page 88: ......
Page 108: ......