Datasheet

TMC4361A Datasheet | Document Revision 1.22 • 2017-JAN-12
136/230
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to technical change reserved. Download newest version at: www.trinamic.com .
Read entire documentation; especially the “Supplemental Directives” on page 224.
 MAIN MANUAL 
In a classical application, the operation area is limited by the maximum torque required
at maximum application velocity. A safety margin of up to 50% torque is required, in
order to compensate unforeseen load peaks, torque loss due to resonance, and aging
of mechanical components. dcStep makes it possible to use the available motor torque
to its fullest. Even higher short-time dynamic loads can be overcome by using motor
and application flywheel mass without the danger of causing a motor stall. With
dcStep, the nominal application load can be extended to a higher torque, which is only
limited by the safety margin near the holding torque area (which is the highest torque
the motor can provide). Additionally, maximum application velocity can be increased
up to conditional maximum motor velocity.
Figure 59: dcStep extended Application Operation Area
 Turn page for more information about enabling dcStep forTMC26x stepper motor drivers.
Classic operation area
with safety margin
torque
velocity [RPM]
dcStep operation - no step loss can occur
additional flywheel mass torque reserve
microstep
operation
0
M
NOM1
M
MAX
DC_VEL
VMAX
M
NOM
: Nominal torque required by application
M
MAX
: Motor pull-out torque at v=0
application area
max
.
motor torque
safety margin
dcStep extended
Safety margin:
Classical application operation area is limited by a certain
percentage of motor pull-out torque
M
NOM2
dcStep increases
usable Motor
Torque