Spindle Movements - Siemens SINUMERIK 808D User Manual

11.8

Spindle movements

11.8.1 Gear stages
Fu n ction
Up to 5 gear stages can be configured for a spindle for speed/torque adaptation. The selection of a gear stage takes place in
the program via M commands (see Section "Miscellaneous function M (Page 125)"):
● M40: Automatic gear stage selection
● M41 to M45: Gear stage 1 to 5
11.8.2 Spindle speed S, directions of rotation
Fu n ctionality
The spindle speed is programmed in revolutions per minute under the address S provided that the machine possesses a
controlled spindle.
The direction of rotation and the start or end of the movement are specified via M commands (also see Section
"Miscellaneous function M (Page 125)").
M3: Spindle clockwise
M4: Spindle counter-clockwise
M5: Spindle stop
N o te
For integer S values, the decimal point can be omitted, e.g. S270.
In formation
If you write M3 or M4 in a b l ock with axis movements, the M commands become active b efore the axis movements.
D e fault setting: The axis movements only start once the spindle has accelerated to speed (M3, M4). M5 is also issued
before the axis movement. However, there is no waiting for spindle standstill. The axis movements begin before spindle
standstill.
The spindle is stopped at program end or with RESET.
At program start, spindle speed zero (S0) is in effect.
N o te
Other settings can be configured via machine data.
Programming example
N10 G1 X70 Z20 F300 S270 M3
N80 S450
N170 G0 Z180 M5
Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
; Before the axis traversing X, Z the spindle accelerates to 270
rpm, clockwise
; Speed change
; Z movement, spindle comes to a stop
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