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GENERAL DESCRIPTION
The Centent CN0165 is a high resolution step motor drive designed for the operation of
hybrid PM step motors rated from 0.1 to 20 amps per phase. The CN0165 operates on a
supply voltage of 18-80 volts DC. Drive output current ranges from 0.1 to 10 amps per
phase. Maximum step input frequency is 1.5 MHz. The minimum on or off time for the
step input is 300 nanoseconds. Motor winding inductance as low as 0.5 millihenrys is
permitted.
The CN0165 features eight selectable microstep resolutions per drive. Available
resolutions range from full-step to 256 microsteps per full step. The step resolution is
selected by jumpering the option header located on the face of the drive.
The CN0165 is capable of delivering up to 1.5 million microsteps per second to the step
motor. The pin-out of the CN0165 is compatible with other Centent step motor drives.
The design of the CN0165 is a combination of recirculating current and non-recirculating
current type chopper drives. It features electronic viscous damping for control of motor
mid-band instability (anti--resonance) and a high-speed torque boost circuit. MOSFET
transistors are utilized in the 'H' bridge output circuit. Automatic current standby, easily
adjustable from zero to full current, reduces motor phase current while the motor is at
rest. The combination of these features results in an extremely efficient step motor drive
with minimum motor iron losses (heating).
The CN0165 uses high speed opto-isolators for the Step Pulse and the Direction inputs to
provide maximum noise immunity. The Step Pulse and Direction inputs are compatible
with TTL drivers and require no additional components.
Motor stepping occurs on the high to low transition of the Step Pulse Input. The
Direction Input hold time is one microsecond after the active edge of the Step Pulse
Input. The Direction Input can be updated simultaneously with the active transition of the
Step Pulse Input.
Over-current conditions like winding shorts, overheating conditions such as insufficient
heat sinking, and under-voltage conditions like power supply failure are sensed by the
CN0165. When any of these conditions occur the CN0165 shuts down, activating the
Fault Output and lighting the Fault LED located on the face of the drive.
The Centent CN0165 High Resolution Microstep Drive is compact; measuring 4.75
inches x 4.00 inches x 0.85 inches (121mm x 102mm x 22mm). It comes encapsulated in
a heat conductive epoxy and encased in an anodized aluminum cover. This results in a
rugged package that resists abuse and contamination, suitable for harsh environments.
Summary of Contents for CN0165
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