Easson ES-12, Инструкции по эксплуатации, Страница: 78 / 122

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Shrinkage Calculation
Example : To drill the following holes in the plastic injection mould
28
28
20
20
20
15
15
12
40
Because the plastic material will shrink when it cool
down after the plastic injection process, the
dimensions of the holes in the mould have to be
expanded according to the shrink factor.
Normally, the mould maker have to calcuate all
expanded dimensions in prior to the machining.
With the ES-12's shrinkage compensation function
which actually expands the actual dimension by
shrink factor, it enable the operator to drill directly
according to the dimension specified in the drawing,
no need to calculate the expanded dimensions one
by one.
Operation procedure
press to enter the shrink factor
2. Set the ES-12 to Expand Compensation mode for machining
1. Enter the Shrink Factor into the ES-12, in this example, the ABS plastic is used of which the shrink factor is 1.005
When the DRO is in Shrinkage Compensation
display mode, the displayed dimensions in
all axes are either "expanded" or "reduced"
by the ratio of
shrink factor .
To remind the operator that the DRO is in
Shrinkage Compensation mode, the message
display will displaying :
1) The message of "+ SHRINK" and keep flashing
2) Give a beep sound for every 10 sec.
3) All DRO functions are disabled
Expand
Actual Dimension display
Shrinkage Compensated display
The displayed dimension are now divided
by the
shrink factor
( 1.005 in this example )
X
Y
Z
ABS
mm
mm
mm
123.450
22.500
120.345
X
Y
Z
ABS SHRINK.
mm
mm
mm
1.005
X
Y
Z
ABS
mm
mm
mm
100.000
100.000
100.000
X
Y
Z
ABS + SHRINK.
mm
mm
mm
95.000
95.000
95.000