Rounding With Maximum Possible Axial Dynamic Response (G644) - Siemens SINUMERIK 840D sl Function Manual

MD35240 $MC_ACCEL_TYPE_DRIVE = FALSE (acceleration characteristic DRIVE for axes
on/off)
4.3.3.3

Rounding with maximum possible axial dynamic response (G644)

Function
Maximizing the dynamic response of the axes is key to this type of continuous-path mode with
rounding.
Note
Rounding with G644 is only possible if:
● All the axes involved contain only a linear motion in both the observed blocks.
● No kinematic transformation is active
In case an involved axis contains a polynomial (polynomial programmed, spline active,
compressor active) or a kinematic transformation is active, the block transition is rounded with
G642.
Activation
Continuous-path mode with rounding with the maximum possible axial dynamic response can
be activated in any NC part program block by the modal command G644.
Selecting the exact stop which works on a block-by-block basis enables rounding to be
interrupted (G9).
Continuous-path mode with rounding with the maximum possible axial dynamic response
(G644) can be deactivated by selecting:
● Modal exact stop (G60)
● Continuous-path mode G64, G641, G642, G643 or G645
Parameterization
Rounding behavior with G644 is configured via the thousands and tens of thousands places
in the machine data:
MD20480 $MC_SMOOTHING_MODE (rounding behavior with G64x)
Value
Thousand's place:
0xxx:
1xxx:
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
When rounding with G644, the maximum deviations for each axis specified by the following
machine data are respected:
MD33100 $MA_COMPRESS_POS_TOL
If the dynamics of the axis permit, then any specified tolerance is not utilized.
Input the maximum rounding path by programming ADIS=... or ADISPOS=...(as for G641)
B1: Continuous-path mode, Exact stop, Look Ahead
Meaning
4.3 Continuous-path mode
195