Selecting position display modes – HEIDENHAIN PT 855 for Turning User Manual
Page 16
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Working with POSITIP – First Steps
POSITIP 855
Operating Instructions
17
20
Z
1
X
40
40
0 +10
+25
Z
Z
-10
0
+15
Z
0
Z
Z
0
1
1
Selecting position display modes
Radius/diameter display
Drawings for lathe parts usually give diameter values. When you
turn the part, however, you infeed the tool in radius values.
POSITIP can display either the radius or the diameter for you.
When the diameter is being displayed, the diameter symbol (
∅
) is
shown next to the position value.
Example: Radius display, position
X =
20 mm
Diameter display, position
X = 40
∅
mm
To switch over the display
➤
➤
➤
➤
➤ Press MOD.
➤
➤
➤
➤
➤ Page with the paging keys to the soft key row containing
Radius
or
Dia.
➤
➤
➤
➤
➤ Press this soft key to switch from radius to diameter display
or vice-versa.
Separate value/sum display
Separate value display
In this display mode the positions of the saddle and top slide are
displayed separately. The position displays are referenced to the
datum points which you set for the axes. When an axis slide
moves, only the position display for that axis changes.
The top slide is identified with a small O, for example Z
O
.
Sum display
In this mode the position values of the saddle and top slide are
added together. The sum display shows the absolute position of
the tool, referenced to the workpiece datum.
When the sum display mode is active, a small S is shown next to
the axis designation, for example Z
S
.
Example: Separate value (see Fig. 17): Z = +25.000 mm
Z
O
= +15.000 mm
Sum display (see Fig. 17):
Z
S
= +40.000 mm
The sum display will show correct values only if the actual
position values of both axis slides were correctly added
and entered (with sign) when setting the datum for the
“sum.”
To switch over the display
➤
➤
➤
➤
➤ Press MOD.
➤
➤
➤
➤
➤ Page with the paging keys to the soft key row containing
Sum
or
Seprt
.
➤
➤
➤
➤
➤ Press this soft key to switch from separate value display to
sum display or vice-versa.
Fig. 16: Workpiece for radius/diameter display
example
Fig. 17: Workpiece for separate value/sum
display example