Siemens SINUMERIK 840D sl Operation/Programming Manual page 145

08/2005
4
S (spindle speed)
V (cutting speed)
Machining
♥ Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
The spindle speed S specifies the number of spindle revolutions per
minute (rpm) and is programmed together with a tool. The speed
specification is relative to the main spindle (S1) or counter-spindle
(S3) during turning machining and axial drilling and to the tool spindle
(S2) during drilling and milling machining.
The spindle start occurs immediately after the tool change. Spindle
stop occurs upon reset, program end, or a tool change. The spindle's
direction of rotation is set in the tool list for each tool.
Alternatively to the spindle speed, you can also program the cutting
speed. During the milling cycles, the spindle speed is automatically
recalculated into the cutting speed and vice versa.
The cutting speed V is a circumferential speed (m/min) and it is
programmed together with a tool, alternatively to the spindle speed.
The cutting speed is relative to the main spindle (V1) or the counter-
spindle (V3) for turning machining and axial drilling and corresponds
to the circumferential speed of the workpiece at the point that is
currently being machined.
For drilling and milling machining on the other hand, the cutting speed
is relative to the tool spindle (V2) and corresponds to the
circumferential speed at which the cutting edge of the tool is
machining the workpiece.
For the processing of some cycles, you can choose between
roughing, finishing, or complete machining For certain milling cycles,
finishing edge or finishing bottom are possible.

Roughing
One or more machinings with depth setting

Finishing
One-time machining

Finishing edge
Only the edge of the object is finished

Finishing bottom
Only the bottom of the object is finished

Complete machining
Roughing and finishing with a tool in a machining step
If you want to rough and finish using two different tools, you must call
up the machining cycle twice (1st block = roughing, 2nd block =
finishing). The programmed parameters are retained on the second
call.
Creating a ShopTurn Program
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