HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 254)

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4.24 C-Axis Commands
Zero point shift, C axis G152
G152 defines an absolute zero point for the C axis (reference: MP
1005, .. “Reference point, C axis”). The zero point is valid until the end
of the program.
Standardize C axis G153
G153 resets a traverse angle >360° or <0° to the corresponding angle
modulo 360°—without moving the C axis.
Example: G152
. . .
N1 M5
N2 T7 G197 S1010 G193 F0.08 M104
N3 M14
N4 G152 C30 [zero point of C axis]
N5 G110 C0
N6 G0 X122 Z-50
N7 G71 X100
N8 M15
. . .
Parameters
C Angle (spindle position) of the new C-axis zero point
G153 is only used for lateral-surface machining. An
automatic modulo 360° function is carried out on the face.