Programming instructions

4-2
Motion Blocks NC Programming 17VRS
DOK-MTC200-NC**PRO*V17-ANW1-EN-P
G17
G18
G19
1st Axis [X]
2nd Axis [Y]
3rd Axis [Z]
Abscissa
Ordinate
Z Coord.
Plane XY
Plane ZX
Plane YZ
[A]
[B]
[
C
]
Fig. 4-1: Linear main axes (X, Y, Z) and rotary main axes (A, B, C) in a reference
coordinate system
Linear and Rotary Auxiliary Axes
Linear and rotary auxiliary axes can occupy any given position in space.
•
1st auxiliary axis (symbol: U)
•
2nd auxiliary axis (symbol: V)
•
3rd auxiliary axis (symbol: W)
identify this type of axis.
The axis meanings U, V and W are completely equivalent. They can be
selected for linear and rotary axes, as well as rotary-axis capable main
spindles.
Like the other axes, auxiliary axes take part in positioning operations and
interpolation moves, and like them they reach their programmed final
value simultaneously. The path feedrate (F value) specified in the NC-
program, however, does not apply to the auxiliary axes, but only to the
linear and rotary main axes if they are programmed within a NC-block.
4.2 Interpolation Conditions
Minimized Following-Error Mode 'G06'
A Minimized Following-error mode is activated for the axis moves using
the interpolation condition G06. All subsequent moves along the path are
almost completely true to the path. The NC-block transitions are not
rounded, and they are processed free of interruptions. The path velocity is
reduced to nearly zero in the vicinity of contour corners (bends in the
path). The Minimized Following-error mode is implemented by means of a
dynamic feed forward system. A following error occurs only within the 2-
ms limits of the interpolation clock.
•
Virtually lag-free operation can only be achieved when INDRAMAT
digital drives are used. With analog drives, G06 results in reduced-fol-
lowing-error operation.
•
After it is selected, G06 remains modal active until it is canceled by
G07 or until it is automatically reset at the end of the program or by
BST, M02, M30.
•
This function permits the gain factor to be increased to the machine's
maximum mechanical load limits. A higher gain factor produces better
dynamic characteristics in the axis moves.