HEIDENHAIN ND 730 Manual de usuario
English (en)
10/2002
Position Display Units
for Lathes
User’s Manual
ND 730
ND 770
titel.pm6 21.07.2004, 08:342
HEIDENHAIN
Position display
(ND 730 only two axes)
∆= Distance-to-go
R = Radius/diameter
display
Numericalinput
• Changealgebraicsign
• Calllastdialog
• Change parameters
in the parameter list
Select radius/diameter display
in X axis
• Select special functions
• Page forward in the list of
specialfunctions
• Cancel entry
• Reset operating mode
• Zero the selected axis
(if activated via P 80)
• Select parameter:
CL plus two-digit number
Status display:
SCL = Scaling factor
SET = Setdatum
REF = Blinking:
Traverse the
referencepoints
On continuously:
Reference points have
been traversed
Inch= Inch display • Confirm entry
• Page forward
in the parameter list
T = Selectedtool
• Toolcompensation
• Page backward in the list of
specialfunctions
• Page backward in the list of
parameters
• Select coordinate axes
(ND 730 only X and Z)
• Select axis-specific operating parameters
730_770t1.pm6 21.07.2004, 08:352
Part I Operating Instructions
Fundamentals 4
Switch-On, Traversing the Reference Marks 10
Selecting Radius or Diameter Display 11
Separate Value/Sum Display
(only ND 770) 12
Datum Setting 13
Setting the absolute workpiece datum 13
Entering tool data (relative datums) 14
HoldingPositions 15
Moving theAxes with Distance-To-Go 17
Taper Calculator 19
Error Messages 23
Part II Page 25
Installation and Specifications and following
Part I Operating Instructions
3
This manual is for ND display units with the following
software numbers or higher:
ND 730 for two axes 246 271-07
ND 770 for three axes 246 271-07
About this manual
This manual is divided into two parts:
Part I: OperatingInstructions:
• Fundamentals of positioning
• ND functions
Part II: InstallationandSpecifications:
• Mounting the display unit on the machine
• Description of operating parameters
730_770t1.pm6 21.07.2004, 08:353
Fundamentals
4
+Y
+X
+Z
–Z –Y
–X
Z
X
Fundamentals
You can skip this chapter if you are already familiar with
coordinate systems, incremental and absolute dimensions,
nominal positions, actual positions and distance-to-go!
1) Named in honor of the French mathematician and philosopher
René Descartes (1596 to 1650)
Datumor
origin
Graduation
Coordinate system
To describe the geometry of a workpiece, a rectangular or
Cartesian*
coordinate system is used. The Cartesian coordinate system consists
of three mutually perpendicular axes X, Y and Z. The point of
intersection of these axes is called the datum or origin of the
coordinate system.
Think of the axes as scales with divisions (usually in millimeters) that
allow us to fix points in space referenced to the datum.
To determine positions on a workpiece, the coordinate system is
“laid” onto the workpiece.
With lathe work (i.e. rotationally symmetrical workpieces), the Z axis
moves along the axis of rotation, and the X axis moves in the direction
of the radius or diameter. The Y axis can be disregarded since it would
always have the same values as the X axis.
730_770t1.pm6 21.07.2004, 08:354
Fundamentals
5
Cross slide, saddle and top slide
On conventional lathes, the tool is mounted on a slide that moves in
the direction of the X axis (the cross slide) and in the direction of the Z
axis (the saddle).
Most lathes have a top slide above the saddle. The top slide moves in
Z axis direction and is designated Zo.
Z
Z
O
X
+Z
+X
+Z
O
730_770t1.pm6 21.07.2004, 08:355
Fundamentals
6
Z
X
10 5
3530
Datum setting
The workpiece drawing is used as the basis for machining the
workpiece. To enable the dimensions in the drawing to be converted
into traverse distances of machine axes X and Z, each drawing
dimension requires a datum or reference point on the workpiece
(since a position can only be defined in relationship to another
position).
The workpiece drawing always indicates one absolute datum (the
datum for absolute dimensions). However, it may contain additional,
relative datums.
In the context of a numerical position display unit,
datum setting
means bringing the workpiece and the tool into a defined position in
relation to each other and then setting the axis displays to the value
which corresponds to that position. This establishes a fixed
relationship between the actual positions of the axes and the
displayed positions.
With the ND, you can set one absolute datum point and as many as
9 relative datum points (tool datums), and store them in nonvolatile
memory.
Absolute
datum
Relative
datum
730_770t1.pm6 21.07.2004, 08:356
Fundamentals
7
Nominalposition,actualpositionanddistance-to-go
The positions to which the tool is to move are called the nominal
positions (
S
). The position at which the tool is actually located at any
given moment is called the actual position (
I
).
The distance from the nominal position to the actual position is called
the distance-to-go (
R
).
Signfordistance-to-go
When you are using the distance-to-go display, the nominal position
becomes the relative datum (display value 0). The distance-to-go is
therefore negative when you move in the positive axis direction, and
positive when you move in the negative axis direction.
Tooldatums(toolcompensation)
Your display unit should show you the absolute position of the
workpiece, regardless of the length and shape of the particular tool
being used. For this reason you must determine the tool data and
enter it. First touch the workpiece with the cutting edge of the tool
and then enter the associated display value for that position.
You can enter tool data for up to 9 tools. When you have set the
absolute workpiece datum for a new workpiece, all tool data (= relative
datum points) are referenced to the new workpiece datum.
IS
Z
X
R
T1 T2 T3
730_770t1.pm6 21.07.2004, 08:357
Fundamentals
8
Z
X
15
5
35
65
1
0
Absoluteworkpiecepositions
Each position on the workpiece is uniquely defined by its absolute
coordinates.
Example Absolute coordinates of position
1
:
X = 5 mm
Z = –35 mm
If you are working according to a workpiece drawing with absolute
dimensions, you are moving the tool to the coordinates.
Z
X
1
10 5
3530
2
Relative workpiece positions
A position can also be defined relative to the previous nominal
position. The datum for the dimension is then located at the previous
nominal position. Such coordinates are termed relative coordinates or
chain dimensions. Incremental coordinates are indicated by a
preceding I.
Example Relative coordinate of position referenced to
position :
IX= 10 mm
IZ = –30 mm
If you are working according to a workpiece drawing with incremental
dimensions, you are moving the tool by the dimensions.
Signforincrementaldimensioning
A relative dimension has a positive sign when the axis is moved in the
positive direction, and a negative sign when it is moved in the
negative direction.
2
1
730_770t1.pm6 21.07.2004, 08:358
Fundamentals
9
Z
Positionencoders
The position encoders on the machine convert the movements of the
machine axes into electrical signals. The ND display unit evaluates
these signals, determines the actual position of the machine axes and
displays the position as a numerical value.
If the power is interrupted, the relationship between the machine axis
position and the calculated actual position is lost. The reference marks
on the position encoders and the REF reference mark evaluation
feature enable the ND to quickly re-establish this relationship again
when the power is restored.
Workpiece
Reference marks
The scales of the position encoders contain one or more reference
marks. When a reference mark is crossed over, a signal is generated
identifying that position as a reference point (scale datum = machine
datum).
When these reference points are crossed over, the ND's reference
mark evaluation feature restores the relationship between axis slide
positions and display values as you last defined it by setting the
datum. If the linear encoders have distance-coded reference marks,
you need only move the machine axes a maximum of 20 mm to
restore the datum.
Scale in linear
encoder
Reference mark
Distance-coded
reference marks
Encoder
730_770t1.pm6 21.07.2004, 08:359
10
Switch-On,Traversing the ReferenceMarks
ENT ... CL
ENT
Crossing over the reference marks stores the last relationship
between axis slide positions and display values for all datum points in
nonvolatile memory.
Note that if you choose not to cross over the reference marks (by
clearing the dialog ENT ... CL with the CL key), this relationship will be
lost if the power is switched off or otherwise interrupted!
Cross over the reference marks in all axes (in any
sequence). Each axis display becomes active when
its reference mark is crossed over.
Turn on the power (switch located on rear panel).
REF starts blinking in the status display.
0è1
Switch-On, Traversing the Reference Marks
You must cross over the reference marks if you want to use
the multipoint axis error compensation function.
(See “Multipoint Axis Error Compensation”)
Confirm reference traverse mode. REF remains
on continuously. Decimal points start blinking.
730_770t2.pm6 21.07.2004, 08:3610
Otros manuales para ND 730
1
Este manual sirve para los siguientes modelos
1
Tabla de contenidos
Otros manuales de Monitor de HEIDENHAIN
HEIDENHAIN
HEIDENHAIN VRZ 770 Manual de usuario
HEIDENHAIN
HEIDENHAIN ND 286 Manual de usuario
HEIDENHAIN
HEIDENHAIN ND 780 Manual de usuario
HEIDENHAIN
HEIDENHAIN ND 720 Manual de usuario
HEIDENHAIN
HEIDENHAIN ND 231 Manual de usuario
HEIDENHAIN
HEIDENHAIN BE 411F Manual de usuario
HEIDENHAIN
HEIDENHAIN ND 730 Manual de usuario
HEIDENHAIN
HEIDENHAIN ND 710 Manual de usuario
HEIDENHAIN
HEIDENHAIN ND 281B Manual de usuario
HEIDENHAIN
HEIDENHAIN VRZ 650 Hoja de instrucciones
