PCD (Pitch Circle Diameter) / Bolt-Hole
The
EM250
PCD calculator operates on the work-to-zero principle for the machining of a regular series of holes
around a datum. This datum is entered as the centre of the circle to be machined. Complex hole patterns can be
achieved easily without the need of detailed trigonometric calculations as these are all performed by the DRO.
To achieve these calculations the DRO needs to be configured with the following parameters:
●
Centre of the circle
●
Diameter of the circle
●
Number of holes required
●
Start angle of the first hole
●
End angle of the last hole
X+
Y+
+
Angles are positive clockwise
1
To best demonstrate these methods let us consider the part below as by way of example.
Parameter
Value
Centre co-ordinates 0.000, 0.000
Diameter
80mm
Number of Holes
5
Start Angle
30
o
End Angle
300
o
If a full circle is needed:
●
Start Angle = 0
o
●
End Angle = 360
o
.
ABS
.
.
CENTRE
.
Enter the PCD function by pressing the key. The key LED will be illuminated showing the function is active.
.
CENTRE
.
Enter the co-ordinates of the centre of the PCD circle.
.
CENTRE
.
Use the Message
Navigation keys
.
DIA
Move to Diameter entry and enter value.
.
DIA
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Summary of Contents for EM250 Series
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