Programming instructions

4-34
Motion Blocks NC Programming 17VRS
DOK-MTC200-NC**PRO*V17-ANW1-EN-P
A positionable main spindle is needed for the G65 tapping function.
•
The main spindle must be stopped using M05 before activating G65
tapping.
•
When G65 is active, it is not possible to traverse using G00; no circu-
lar and helical interpolation G02/G03 is performed, and no axis refer-
encing G74 is performed. Feed functions relating to the NC-block
transition (G08, G09, G61, G62) are suppressed.
•
No axis moves can be programmed in a G65 NC-block.
•
The spindle must be activated after the G65 NC-block; whether tap-
ping is clockwise or counter-clockwise depends on the spindle direc-
tion declaration M03 or M04. The spindle remains inactive unless acti-
vated by a traverse command in a main axis.
•
The linking factor feed per spindle revolution
must be programmed in
a single NC-block containing G65 by using the F-word.
•
Tapping should be performed using the preparatory function G06 po-
sitioning with minimized lag.
•
With main spindles which are driven directly and in which the position
encoder is located directly on the spindle, the G65 function can also be
used to tap threads without using a compensating chuck, provided that
the speed is moderate.
•
If a different spindle is selected for thread tapping via G65, the spindle
must be activated by means of the SPF <spindle number> command
prior to the G65 NC-block. The first spindle (S/S1) is always active in
the power-on state.
•
G65 is overlaid by G93 or overwritten by G94 or G95, which automati-
cally stops the spindle.
•
Depending on the parameter setting, the thread lead can be entered
using 3 or 4 places to the left of the decimal point and, correspondingly
5 or 4 places to the right of the decimal point.
NOTE
If G65 is active, only the linear main axes, X, Y and Z
may be programmed. Other axis letters will result in an
error message.
Example NC-program - tapping with G65
20
40
60
80
100
20 40 60 80 100
X
Y
20
40
60
80
100
X
Z
-10010
[P2]
[P1]
[P3]
[P4]
[P1]
[P2]
[P3]
[P4]
Fig. 4-40: Tapping with G65