HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 382)

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TNC 407/TNC 415/TNC 425 15 Tool changer 4-257
15.3.11 Program module COMPUTE SHORTEST PATH
The program determines the direction in which the tool magazine must move in order to reach the
search pocket number by the shortest path. The path is filed in marker M3042:
M3042 = 0: reverse
M3042 = 1: forward
NOMREG >
Save absolute
value from
ISTREG-NOMREG
difference to
ABSREG
No
Yes
No
Yes
Magazine
forward
Magazine
reverse
ISTREG
Divide number of
mag. pockets by
two and save to
MAGREG
Fetch search
pocket from data
stack to NOMREG
ABSREG >
MAGREG
End
ABSREG <
MAGREG
NOMREG <
ISTREG
No
Yes
No
M3042 = 1 M3042 = 0
Yes