Siemens SINUMERIK 840D sl Function Manual page 135

N280 PAROT
N290 X0 Y0 Z0
N300 G18 MOVT=AC(20)
N310 G17 X10 Y0 Z0
N320 MOVT=-10
N330 PAROTOF
N340 TCOFR
N350 X10 Y10 Z-13 A0 B0
N360 ROTS X-45 Y45
N370 X20 Y0 Z0 D0
N380 Y20
N390 X0 Y0 Z20
N400 M30
The definition of the toolholder with orientation capability is given in full. The components which
contain the value 0 need not actually be given, as they are preset to zero in any case.
The toolholder is activated in N270.
$TC_CARR21 and $TC_CARR22 refer to the machine axes A and B and TCOABS is active,
As
the values in
used for the rotation.
The rotation of the 4th offset vector (length 15 mm in Z direction) around the B axis causes an
offsetting of the zero point by X10.607 [= 15 * sin(45)] and Z-4.393 [= -15 * (1. - cos(45))]. This
zero offset is taken into account by an automatically written basic or system frame so that the
position X10.607 Y10.000 Z8.607 is approached. In the Z direction the tool selection leads to
an additional offset of 13 mm; the Y component is not affected by the table rotation.
N280 defines a rotation in accordance with the rotation of the table of the toolholder with
orientation capability. The new X direction thus points in the direction of the bisecting line in the
4th quadrant, the new Z axis in the direction of the bisecting line in the 1st quadrant.
The zero point is approached in N290, i.e. the machine position X10.607 Y0 Z-4.393, since the
position of the zero point is not changed by the rotation.
N300 traverses in Y to the position Y33.000, since G18 is active and the Y component is not
affected by the active frame. The X and Z positions remain unchanged.
The position X17.678 Y0 Z1.536 is approached in N310.
N320 changes only the Z position to the value -8.464 as a result of the MOVT command. As only
the table can be rotated, the tool orientation remains unchanged parallel to the machine Z
direction, even if the Z direction of the active frame is rotated by 45 degrees.
N330 deletes the basic or system frame; thus the frame definition from N280 is undone.
In N340, TCOFR specifies that the toolholder with orientation capability is to be aligned
according to the active frame. Since a rotation is no longer active in N330 due to the PAROTOF
command, the default setting is applied. The frame offset becomes 0.
N350 thus approaches the position X10 X10 Z0 (= Z-13 + tool length). Notice: Through the
simultaneous programming of both rotary axes A and B the actual position of the toolholder with
orientation capability is made to match that used in N340. The position approached by the three
linear axes is dependent on this position, however.
Tools
Function Manual, 06/2019, A5E47435126B AA
$TC_CARR13 and $TC_CARR14 are ignored, i.e. the axis position A0 B45 is
2.8 Tool carriers with orientation capability
W1: Tool offset
135