Programming instructions

NC Programming 17VRS Motion Blocks
4-11
DOK-MTC200-NC**PRO*V17-ANW1-EN-P
Examples
Test Contour: Transition from Straight Line -> Circle Not Tangential , Circle -
Circle Tangential
Feed:
F4000
G06 , G61
Gain = 7
Transition St. Line -> Circle
Not Tangential
Transition Circle -> Circle
Tangential
Position Difference
in Transition
St. Line -> Circle
Oscilloscope Function
Position Values Y Axis [mm]
Position Difference:
Position Command Value:
Expansion Factor: 613.8
Position Values X Axis [mm]
Fig. 4-14: Contour diagram with G61
The contour diagram shown here (Fig. 4-14) illustrates how the contour is
accurately maintained by G61 in the transition from the straight line
→
to
the circle and from the circle
→
to the circle. The positioning window for
the examples shown here is specified as 0.010 mm in the axis parame-
ters. The position deviation in the non-tangential transition from the
straight line
→
circle is 0.00249 mm. If the positioning window in the axis
parameters were increased in size, the transition would be made with
correspondingly higher accuracy. The position deviation is less than 0.001
mm in the tangential transition circle
→
circle.
Example of a program for the diagrams shown in Figs. 4-14 and 4-15:
G00 G54 G90 G06 G08 X-100 Y-100 Starting point
G01 G61 X-50 Y-50 F4000 1st straight line
G02 X50 Y-50 I0 J-50 1st semicircle
G03 X100 Y-50 I75 J-50 2nd semicircle
RET Return to program beginning
The following velocity diagram (Fig. 4-15) shows how the velocity is re-
duced until the positioning window is reached. When the positioning win-
dow is reached, processing switches to the next NC-block and the next
axis move starts.
Diagram: Transition from Straight Line -> Circle Not Tangential , Circle ->
Circle Tangential
4.0000
Feed
Feedrate F4000
G06 , G61
Transition St. Line -> Circle
Not Tangential
Transition Circle -> Circle
Tangential
Gain = 7
Axis Number :
Axis Name :
Axis Name :
Axis Number:
Summed Signal Generation
Actual Position
Actual Position
Fig. 4-15: Velocity diagram with G61