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CNC Robotics
L297·l297D
MOTORDRIVINGPHASE SEQUENCES
The L29Ts translator generatesphase sequences Clockwiserotation is indicate;for anticlockwisero-
for normal drive, wave drive and half step modes. tation the sequences are simply reversed liESET
The state sequences and output waveforms for restores the translator to state 1, where ABeD =
these three modes are shown below. In all cases 0101.
the translatoradvanceson the low to high transis-
tionof~.
HALF STEP MODE
Half step mode is selectedbya high level on the HALFiFOIT input.
o
----,u r----,ur--u--
NORMALDRIVE MODE
Normal drive mode (also called "two-phase-on" drive) is selected by a low level on the HALFJro[[ input
when the translator is at an odd numbered state (1, 3, 5 or 7). In this mode themm and TNR2 outputs
remain high throughout.
100 1€J~I010
\ •
[iJ 0 ,
, )
OIOI~ 0 pr0l10 c
HO~_~
o . • .~-
INI-<\
----- -- ---- - - - - ---- - -- - - -- -- - -- _ . _--~-- -
----------liii~.= 5/11
26
r- - - - - - - - - - - - - - - - - - - - - - - - - - - -
