EMS EM250 Series, Operational And Installation Manual

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Simple Radius Function (R-Function)
The EM250 R-Function operates on the work-to-zero principle for the machining an radius. This is the simplest
method for machining one of the eight most common arcs. For more complex arcs see the Auto-R Radius Function.
The common types of arc are shown below. The operation of the R-Function assumes the tool is located at the start
of the arc as depicted by . These are all circular arcs with a user defined radius.
X
Y
Z
Parameter Value
Plane of Operation XZ
ARC Type (1-8) 2
Radius of ARC 200mm
Tool Diameter 6mm
Position tool at the
start of the arc.
Move the Tool to the start of the ARC. It is also possible to machine in the Z plane on a 2-axes XY DRO on Mills. To do
this we will need to use the Knee axis Z-dial for as a manual reference.
ABS
.
.
.
SIM.R XY
Navigate to the plane required and press key. The display will move to the ARC type entry automatically.
SIM.R XZ TYPE 1-8
Set the Z-STEP to the required machining mode using the key BEFORE entering the R-Function
To best demonstrate these methods let us consider the part below as by way of example.
Enter the R-Function by pressing the key. The key LED will be illuminated showing the function is now active.
When the tool has been
positioned at the start of
the ARC zero the Z-axis
dial (2-axis DRO Only)
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