Siemens SINUMERIK 840D Operation/Programming

3
Programming with ShopMill 10.04
3.7 Drillin
g
3
 Siemens AG, 2004. All rights reserved
3-238 SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
SR Spindle speed for retraction (not for tapping with a floating tapholder) rev/min
VR Cutting rate for retraction (alternative to SR) (not for tapping with a floating tapholder) m/min
1 cut
Stock removal
Chipbreaking
The thread is drilled in one cut without stopping.
The drill is retracted from the workpiece for stock removal (not for tapping with a
floating tapholder)
The drill is retracted by the retraction amount V2 for chipbreaking
(not for tapping
with a floating tapholder)
Z1 Tapping depth with reference to Z0 (abs. or inc.)
Z0 is specified in the position pattern ("Positioning" softkey).
mm
D Maximum infeed (for stock removal or chipbreaking only) mm
V2 Retraction amount (for chipbreaking only)
Amount by which the drill is retracted for chipbreaking.
V2=automatic: The tool is retracted by one revolution.
mm
3.7.6 Thread milling
You can use a form cutter to machine any type of right-hand or left-
hand thread.
Threads can be machined as right-hand or left-hand threads and from
top to bottom or vice versa.
For metric threads (thread pitch P in mm/rev) ShopMill assigns a
value calculated from the thread pitch to the Thread depth K
parameter. You can change this value. The default selection must be
activated via a machine data code.
Please refer to the machine manufacturer's instructions.
Thread
>
Cut thread
 Press the "Drilling", "Thread" and "Cut thread" softkeys.
Internal thread Sequence:
• Position on thread center point on retraction plane in rapid traverse
• Infeed at rapid traverse to reference plane shifted forward by
amount corresponding to safety clearance
• Approach along an approach circle calculated in the control at
programmed feedrate
• Approach motion to thread diameter on circular path
• Cut thread along a spiral path in clockwise or counterclockwise
direction (depending on whether it is left-hand or right-hand thread)

Siemens SINUMERIK 840D Specifications

General

Brand	Siemens
Model	SINUMERIK 840D
Category	Control Unit
Language	English