Easson Premium SC-100, Manual

Page: 18 / 108

Purpose :
Most DRO cabinet on the market provide just two set of work co-ordinates - ABS/INC . It was
found that ABS/INC was inadequate and inconvenient to use, and, particularly in the case of
complex machining or repetitive work, which needed more than just two sets of working
co-ordinates.
ABS / INC operation has the following shortfalls :
- In much machining work, the work-piece machining dimensions are derived from more than
two datums, therefore, the operator has to switch between
ABS and INC to set up the
machining datums time after time. This process is very time consuming and prone to error.
- In the case of batch machining of repetitive work, the operator has to set up and calculate
all the machining positions time after time.
SC-100 provides a 199 subdatum ( SdM ) memory to cope with the shortfalls of ABS/INC . SdM
function does not just simply provide 199 sets of INC co-ordinates, it is specially designed to provide much
more convenient features for the operator to cope with repetitive work.
The difference between
INC and SdM is as follows:.
1. INC is independent of ABS and will not follow any change in ABS zero point. All S dM
co-ordinates are relative to the ABS coordinates, so, all SdM positions will move together
when the ABS zero position changes.
2. All SdM relative distance data to ABS can be entered directly into SC-100 memory using the
keypad. No need for any additional calculations.
SdM application in a work piece that has more
that one datum.
Operator can store all the work subdatums in
SC-100's memory as per follows.
( sdm 2 )
Subdatum 2
( ABS )
Work piece
main datum
( sdm 1 )
Subdatum 1
( sdm 4 )
Subdatum 4
( sdm 3 )
Subdatum 3
Operator then can
switch between
the subdatums directly
by pressing key
No need to refer back
to ABS coordinate and
set up the subdatums
from their relative
distance from ABS point
( sdm 3 )
point 3
( ABS )
Work Piece Datum (0.000)
( sdm 2 )
point 2
( sdm 4 )
point 4
( sdm 1 )
point 1
SdM application on the repetitive batch machining of
parts
Because all sdm subdatums (0.000) are relative to
ABS zero, so, for any repeative work, the
operator just needs to set up the first work piece zero
at ABS and store the machining position in subdatum
zero.
For anymore repeative parts, just set up the 2nd, 3rd..
work piece zero at ABS, then all the machining
positions will reappear
Press Up/Down
key to go to
machining points
move the machine
to display = 0.000,
then machining
location reached
or
or
- 10 -
DIGITAL COUNTER
Made in Taiwan
SC-103
Sdm 2
0.000
0.000
abs
inc
½
ref sdm
inch
mm
R
R R
9 8 7
4 5 6
1 2 3
CE 0
cal
sin
COS tan
M
in M
R
+
ENT ENT ENT ENT
X
X
0
Y
Y
0
Z
Z
0
DIGITAL COUNTER
Made in Taiwan
SC-103
Sdm 2
abs
inc ½
ref sdm
inch
mm
R
R R
9 8 7
4 5 6
1 2 3
CE
0
cal sin COS tan
M in M
R
+
ENT ENT ENT ENT
X
X
0
Y
Y
0
Z
Z
0