Intelligent Motion Systems MForce PowerDrive Plus MForce Series Microstepping PowerDrive - Manual (Page 38)

20 Microstepping MForce PowerDrive Manual Revision R040507
and sourcing configurations, the driver output circuitry will be disabled. Please note that the internal sine/cosine
position generator will continue to increment or decrement as long as step clock pluses are being received by the
Microstepping MForce PowerDrive.
Clock Inputs
The Microstepping MForce PowerDrive features the ability to configure the clock inputs based upon how the user
will desire to control the drive. By default the unit is configured for the Step/Direction function.
Step Clock
The step clock input is where the motion clock from your control circuitry will be connected. The motor will
advance one microstep in the plus or minus direction (based upon the state of the direction input) on the ris-
ing edge of each clock pulse. The size of this increment or decrement will depend on the microstep resolution
setting.
Direction
The direction input controls the CW/CCW direction
of the motor. The input may be configured as sinking or
sourcing based upon the state of the Optocoupler Refer-
ence. The CW/CCW rotation, based upon the state of the
input may be set using the IMS Motor Interface software
included with the Microstepping MForce PowerDrive.
Quadrature
The Quadrature clock function would typically be used for
following applications where the Microstepping MForce
PowerDrive would be slaved to an MForce PowerDrive
Microstepping (or other controller) in an electronic gearing
application.
Up/Down
The Up/Down clock would typically be used in a dual-
clock direction control application.
Input Timing
The direction input and the microstep resolution inputs
are internally synchronized to the positive going edge of
the step clock input. When a step clock pulse goes HIGH,
the state of the direction input and microstep resolution
settings are latched. Any changes made to the direction
and/or microstep resolution will occur on the rising edge of
the step clock pulse following this change. Run and Hold
Current changes are updated immediately. The following
figure and table list the timing specifications.
Input Filtering
The clock inputs may also be filtered using the Clock IOF
pull down of the IMS SPI Motor Interface. The filter range
is from 50 nS (10 MHz) to 12.9 µSec. (38.8 kHz).
The configuration parameters for the input filtering is
covered in detail in Section 2.4: Configuring the Microstepping MForce PowerDrive.
Step Clock
Direction
Channel A
Channel B
CW
CCW
Step/Direction Function
Quadrature Function
Up/Down Function
Figure 2.4.2: Input Clock Functions