EMS EM250 Series, Operational And Installation Manual

Page: 13 / 44

.
.
RECALL 0
.
.
FD. X REF
.
.
ABS
Reference Function
This function allows user to set a machine zero datum and can be applied to each axis. With this machine zero point
users can restore the work coordinates even if the machine is moved when the DRO is in OFF condition. Generally
each encoder has reference marks present at periodic interval (for most
ems-i
scales this would be every 50mm) or
at the scale centre of travel. These reference marks are used to recall the same datum point every time.
.
.
ABS
Example: Find X-axis machine Reference
The DRO is now looking for
the reference signal from
the scale…
Move the axis towards the reference. The
displayed axis value will NOT count. When
the reference is detected the DRO will BEEP
and the display will start counting. The
scale/machine datum will be at 0.000.
When scales with periodic
references are used you must
ensure that the same reference
is used every time.
This can be the first reference,
from one end of travel, or
alternatively by always starting
the reference search from the
same physical machine
position.
Shrink Function
This function key allows for the programming of a scalar value that can be used to compensate for part shrinkage. .
Whilst it can be used on Lathe DRO’s it is primarily intended for use when machining mould tools on milling
machines. All axes are effected by this operation.
For this function to be active it needs to be enabled in the machine Setup.
.
.
ABS
Example: Set a compensation of 0.5%
.
SHRINK
.
SHRINK
.
.
ABS
All axes positions are multiplied
by the entered scalar when
SHRINK is enabled. As such the
part will be made over-size
such that it will contract to the
desired final dimensions.
To disable the function either
turn-off in Setup or set the
compensation value to 1.000.
For this function to be conducted on power-on where Segmented Error compensation has been set. Only
use this function in ABS mode. The REF LED shows when the function is enabled.
- 11 -