HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 291)

HEIDENHAIN CNC PILOT 4290 291
4.28 Assignment, S
y
nc
hr
onization, W
o
rk
piece T
ransf
er
Controlled parting using lag error monitoring
G917
G917 monitors the path of traverse. The controlled parting function
(cut-off control) prevents collisions caused by incomplete parting
processes.
Application
„ Parting control Move the workpiece in the positive Z direction after
it has been cut off. If a lag error occurs, the workpiece is defined as
no cut-off.
„ Smooth parting control: Move the workpiece in the negative Z
direction after it has been cut off. If a lag error occurs, the workpiece
is defined as no correct cut-off.
In MP 1115, 1165, .. you specify:
„ Lag error limit
„ Feed rate of the monitored path of traverse
Process of controlled parting:
1 Part the workpiece
2 Activate the monitoring function for the path of traverse with G917
3 Move the workpiece with G1 after it has been cut off
4 The CNC PILOT checks the lag error and stores the result in
variable V300
5 Evaluate variable V300
Test results
G917 produces satisfactory results provided that:
„ Rough chuck jaws rotate up to 3000 rpm
„ Smooth chuck jaws rotate up to 2000 rpm
„ Clamping pressure > 10 bars