34169522 - heidenhain - DR. JOHANNES HEIDENHAIN GmbH

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Fundamentals 4 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. Coordinate system To describe the geometry of a workpiece, the 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) which 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. The machine axes are parallel to the axes of the coordinate system. The Z axis is normally the tool axis. 1) Named in honor of the French mathematician and philosopher René Descartes (1596 to 1650) Y +Y Z +Z –X Datum or origin –Z Graduation –Y X +X
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, Y 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. You can set 2 absolute datum points and store them in nonvolatile memory. 1225 750 320 0 Absolute datum 0 300±0,1 150 0 -150 325 -250 -216,5 -125 0 125 216,5 250 0 450 700 900 950 216,5 125 0 -125 -216,5 250 Relative datums -250 Fundamentals 5
Page 1 and 2: User’s Manual Position Display Un
Page 3: This manual is for the ND display u
Page 7 and 8: Nominal position, actual position a
Page 9 and 10: Switch-On, Traversing the Reference
Page 11 and 12: Probing a workpiece edge to find a
Page 13 and 14: ENT 0 ENT Z PROBE Z (appears only b
Page 15 and 16: PROBE EDGE ANTASTEN or MITTE PROBE
Page 17 and 18: PROBE CIRC. ENT 1ST POS X (appears
Page 19 and 20: Tool Compensation You can enter the
Page 21 and 22: X 3 0 R + - Y 5 0 R + - SPEC FCT or
Page 23 and 24: SPEC FCT SPEC FCT BOLT HOLE FULL CI
Page 25 and 26: Linear Hole Patterns The linear hol
Page 27 and 28: NUMBER ROW 3 ROW SPACE 2 START ENT
Page 29 and 30: Error Messages Message Cause and ef
Page 31 and 32: Items Supplied 32 Items Supplied ND
Page 33 and 34: Mounting/Power Connection 34 Mounti
Page 35 and 36: Operating Parameters 36 Operating P
Page 37 and 38: Operating Parameters 38 P41.1 to P4
Page 39 and 40: Linear Encoders 40 Parameter settin
Page 41 and 42: Multipoint Axis Error Compensation
Page 43 and 44: Specifications 44 Specifications Ho
Page 45: DR. JOHANNES HEIDENHAIN GmbH Dr.-Jo

34169522 - heidenhain - DR. JOHANNES HEIDENHAIN GmbH

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