Single-Lip Deep-Hole Drilling (Cycle 241, Din/Iso: G241, Software Option 19); Cycle Run; Please Note While Programming - HEIDENHAIN TNC 620 User Manual

3.10 SINGLE-LIP DEEP-HOLE DRILLING
(Cycle 241, DIN/ISO: G241, software
option 19)

Cycle run

1 The TNC positions the tool in the tool axis at rapid traverse
FMAX to the entered set-up clearance above the workpiece
surface.
2 Then the TNC moves the tool at the defined positioning feed
rate to the set-up clearance above the deepened starting point
and activates the drilling speed (M3) and the coolant. The TNC
executes the approach motion with the direction of rotation
defined in the cycle, with clockwise, counterclockwise or
stationary spindle.
3 The tool drills to the hole depth at the feed rate F, or to the
plunging depth if a smaller infeed value has been entered. The
plunging depth is decreased after each infeed by the decrement.
If you have entered a dwell depth, the TNC reduces the feed
rate by the feed rate factor after the dwell depth has been
reached.
4 If programmed, the tool remains at the hole bottom for chip
breaking.
5 The TNC repeats this process (3 to 4) until the programmed
total hole depth is reached.
6 After the TNC has reached the hole depth, the TNC switches off
the coolant and resets the drilling speed to the value defined for
retraction.
7 The tool is retracted to the set-up clearance at the retraction
feed rate. If programmed, the tool moves to the 2nd set-up
clearance at FMAX.

Please note while programming:

Program a positioning block for the starting point
(hole center) in the working plane with radius
compensation R0.
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH=0, the cycle will not be executed.
Danger of collision!
Use the machine parameter
define whether, if a positive depth is entered, the
TNC should output an error message (on) or not (off).
Keep in mind that the TNC reverses the calculation
for pre-positioning when a
entered. This means that the tool moves at rapid
traverse in the tool axis to set-up clearance
the workpiece surface!
HEIDENHAIN | TNC 620 | User's manual for cycle programming | 9/2015
SINGLE-LIP DEEP-HOLE DRILLING (Cycle 241) 3.10
displayDepthErr to
positive depth is
below
3
93