Authorised Mitsubishi Electric Channel Partner · Authorised Oriental Motor Distributor
Oriental Motor · Authorised Distributor India
2-phase and 5-phase microstepping drivers and motor packages — low vibration, affordable, ideal for OEM machines.
Oriental Motor CVD series stepper motor drivers are compact microstepping drivers for 2-phase and 5-phase stepper motors. Smooth microstep drive and a built-in filter cut vibration and noise at low speed, which is where cheaper drivers usually struggle.
CVD drivers are available in pulse-input types for use with any PLC or motion controller, and in RS-485 communication types with built-in positioning so a PLC can command moves over Modbus without a separate pulse generator. The CVK series combines a motor and driver into a ready-matched package for OEM machines.
AB Automation supplies CVD drivers and CVK packages across India, helps match the driver current to your motor, and supports wiring and parameter setup during start-up.
A stepper motor driver does two jobs: it turns step commands into switched current in the motor windings, and it decides how smoothly that current changes from one step to the next. CVD drivers are fully digital. A CPU works out the current for each phase and shapes it as a sine wave instead of the older trapezoidal waveform, so the motor microsteps across its whole speed range, not only at low speed. The Smooth Drive function divides each full step automatically (up to 2,048 divisions internally), which means the PLC can keep sending the same pulse count and frequency while the motor runs noticeably quieter.
The range is built around Oriental Motor's PKP Series motors. The 2-phase and 5-phase drivers share the same size, mounting holes and I/O connectors, so you can try a 1.8° motor and a 0.72° motor on the same machine and keep whichever performs better, with no panel redesign. Each driver comes in three mechanical forms: a bare board, a board on a mounting plate, and a mounting plate with right-angle connectors for shallow enclosures.
The control interface is chosen separately from the motor. Pulse-input drivers take pulse/direction from any PLC or motion card. RS-485 drivers store up to 256 moves and run them over Modbus RTU. The fully closed-loop type corrects the final position from an external linear or rotary encoder. The S Type is a small module you solder onto your own PCB, the 4-axis type runs four motors over EtherCAT, and the CVK SC package gives simple two-speed control with no pulse generator. On many OEM machines, one family can cover every stepper axis.
Choose the motor first, then the driver. The driver has to match the motor's phase count (2-phase or 5-phase) and its rated current. Oriental Motor publishes a combination table that pairs each PKP or PK motor with a CVD model. If you are replacing a motor, the rated current on the nameplate tells you which driver to use.
Next, decide how the machine will command the axis. This matters more than any other choice, because it sets your PLC hardware and your programming effort.
A 2-phase motor takes 200 full steps per revolution (1.8°). A 5-phase motor takes 500 (0.72°), because its stator has 10 poles instead of 8. With more phases sharing the torque, the torque ripple of a 5-phase motor is much lower, so it runs more smoothly, overshoots less, and is less likely to lose step at start and stop. Oriental Motor's comparison puts the peak-to-valley torque ripple at up to about 29 % for 2-phase and about 5 % for 5-phase.
2-phase is the economical, high-torque choice, and it is the most common motor type in general machines. Choose 5-phase when vibration, noise or fine resolution limit the process, for example in inspection cameras, dispensing, lab automation or feeds for delicate products. Because CVD 2-phase and 5-phase drivers share the same footprint and connectors, you can test both on the prototype before you freeze the bill of materials.
Microstepping splits each full step by shifting current gradually from one phase to the next. CVD drivers offer 16 resolution settings, from full step up to 51,200 P/R on 2-phase and 125,000 P/R on 5-phase. Finer resolution makes motion smoother. It does not make the motor more accurate than its mechanical specification of about ±0.05°, so choose resolution for smoothness and for easy pulse maths, not as an accuracy figure.
Smooth Drive handles the smoothness side for you. The driver subdivides steps internally, so a PLC sending 200 pulses per revolution still gets quiet, fine-grained motion. For low-speed indexing on legacy controllers, this often solves the problem without any program change. The command filter softens starts and stops, which helps with loose belts or tall loads, but it slightly reduces how closely the motor follows the pulse train. Leave it off for synchronised multi-axis moves.
Pulse input type: connect the PLC's positioning outputs to PLS (pulse) and DIR (direction), or CW/CCW in 2-pulse mode, and set the 1P/2P switch to match. Line-driver outputs accept up to 1 MHz and open-collector outputs up to 250 kHz. The inputs are designed for 5 VDC, so a 24 VDC PLC output needs a series resistor (Oriental Motor suggests 1.5 – 2.2 kΩ, 0.5 W for the pulse inputs). Wire ALM back to a PLC input so a driver fault stops the sequence. Use twisted-pair I/O cable and keep it under 2 m, routed away from motor and power cables.
RS-485 type: daisy-chain up to 31 drivers from one PLC or HMI port, set a unique slave address on each, and switch on the 120 Ω termination resistor at the last driver. Keep the total bus length within 10 m. Moves such as positioning, homing and continuous run are stored as operation data and triggered by Modbus register writes. Direct data operation writes a new position or speed and starts the move in the same command. The free MEXE02 software over USB lets you set up and test each axis before the PLC program is ready.
Many Indian machines still run older Oriental Motor drivers (the earlier CMK and CRK generations), or drivers from builders who have since closed. To replace one, first confirm the motor's phase count, winding type and rated current. 5-phase motors must stay on a 5-phase driver, and a 2-phase unipolar motor may need rewiring or a new bipolar motor.
CVD drivers run on 24 VDC. If the old unit was an AC-input driver, you will need a DC supply of the right capacity, and you should check that top-speed torque is still enough at 24 V. Map the old step angle setting to the CVD STEP switch so the PLC's pulse-per-millimetre scaling stays the same. On a machine you plan to keep for years, this is also a good time to consider a CVK package or an AZ Series closed loop axis. Send us the old driver and motor nameplates and we will suggest a direct CVD match.
| Power supply | 24 VDC ±10 % |
|---|---|
| Driver rated current (pulse input type) | 2-phase: 0.5 – 4.5 A/phase; 5-phase: 0.35 – 3.8 A/phase (depends on model) |
| Operating current setting | RUN switch, 16 steps from 25 % to 100 % of rated current; automatic standstill current of 25 % or 50 % |
| Resolution (16 settings) | 2-phase: 200 – 51,200 P/R (1.8° – 0.00703125°); 5-phase: 500 – 125,000 P/R (0.72° – 0.00288°) |
| Maximum input pulse frequency | 1 MHz (line driver), 250 kHz (open collector), 50 % duty |
| Pulse input mode | 1-pulse (PLS/DIR) or 2-pulse (CW/CCW), set by switch |
| I/O (pulse input type) | Inputs: pulse, direction, all windings off (AWO), step angle switching (CS). Outputs: alarm (ALM), timing (TIM), photocoupler/open collector, 30 VDC, 10 mA max |
| RS-485 communication type | Modbus RTU, 9,600 – 230,400 bps, up to 31 drivers per host, 256 operation data points, 7 inputs / 2 outputs |
| Drive functions | Smooth Drive, command filter, vibration suppression, full-time sine-wave microstepping |
| Protective functions | Overheat, overvoltage, overcurrent, EEPROM and CPU error, shown by PWR/ALM LED blink count |
| Operating environment | 0 to +50 °C (non-freezing), 85 % RH or less (non-condensing), install inside an enclosure |
| Type | Description | Key ratings |
|---|---|---|
| CVD205 – CVD245 (2-phase, pulse input) | Bipolar drivers for PKP 2-phase motors from 20 mm up to 85 mm frames (PKP213 – PKP29). Board, mounting-plate (B) and right-angle connector (BR) versions. | 0.5, 0.6, 1.5, 2.3, 2.8, 4.2 and 4.5 A/phase |
| CVD503 – CVD538 (5-phase, pulse input) | Drivers for PKP/PK 5-phase motors, plus DRL II compact linear actuators and DH hollow rotary actuators. Board, B and BR versions. | 0.35, 0.75, 1.2, 1.4, 1.8, 2.4, 2.8 and 3.8 A/phase |
| CVD2B-KR / CVD5B-KR (RS-485 communication) | Built-in positioning with 256 operation data points over Modbus RTU. Motor chosen with a setting switch. Right-angle connector versions: CVD2BR-KR / CVD5BR-KR. | 5-phase: 0.35 – 2.4 A/phase |
| CVD5B-KF / CVD5BR-KF (fully closed-loop) | 5-phase driver that reads an external linear or rotary encoder and corrects the final position after an open-loop move. Supports RS-485/Modbus RTU. | 0.35 – 2.4 A/phase |
| CVD5H / CVD5V (S Type board module) | Small module for mounting directly on your own PCB, horizontal (H) or vertical (V). I/O-setting or SPI-communication (-KS) versions. 2-phase versions also exist. | 0.35 – 2.4 A/phase (5-phase) |
| CVD4A-KED / CVD4AR-KED (4-axis EtherCAT) | A single board runs four 2-phase or 5-phase axes, which can be mixed, over one EtherCAT cable. Includes encoder input and brake control. | 0.5 – 3.0 A per axis, 12 A max total |
| CVK Series motor + driver packages | Matched PKP motor and CVD driver sold as one package. 1.8° types for high torque at low speed; 0.72°/0.36° types for low vibration and accuracy. | |
| CVK SC (speed control package) | 5-phase motor and driver that turns while the FWD/REV input is ON and stops as soon as it goes OFF. No pulse generator needed. | Two speed settings, 0.02 – 600 r/min |
Specifications are indicative. Contact us for the exact model, availability, lead time and pricing.
A 5-phase PKP motor on a CVD5 pulse-input driver indexes the forming web by a fixed pitch per cycle. With Smooth Drive and 0.72° base steps, low-speed indexing stays quiet and the web does not jerk.
Smooth, repeatable pitch feed without a servo
A 2-phase CVD driver takes high-frequency pulses from the machine controller to drive a belt-driven traverse. Full-time microstepping keeps vibration low through the mid-speed range, where ordinary stepper drives tend to resonate.
Less mid-speed resonance and noise on the machine
Compact 5-phase axes on CVD drivers position the stone under the camera or laser in fine increments. Where sub-micron final positioning is needed, the fully closed-loop CVD5B-KF corrects position from a linear encoder.
Fine, vibration-free positioning at stepper cost
A PLC with pulse outputs drives a 2-phase CVD on the label-web axis, and the ALM output is wired back to the PLC to stop the line on a fault. Each label is fed by a fixed pulse count, triggered by a sensor.
Accurate label pitch with simple PLC logic
Several RS-485 CVD drivers share one Modbus RTU line from the PLC or HMI. Each stores its dose strokes as operation data, so no pulse outputs or extra positioning modules are needed.
Up to 31 axes on one serial cable
Board-type or S Type CVD drivers fit inside the instrument, running quiet 5-phase motors that move tray and pipette axes. The S Type's SPI control removes the need for a separate pulse-generator IC.
Quiet operation and a smaller electronics board
An old driver with no spares is replaced by a CVD matched to the existing motor's phase and current. The step angle is set to match the old scaling, so the CNC program runs unchanged.
Machine back in production without reprogramming
A CVK SC package runs a short transfer conveyor at a set speed while the PLC input is ON and stops as soon as it goes OFF. Unlike a coasting AC motor, the stepper holds position when stopped.
Consistent stop position without an inverter or brake
Source: Oriental Motor USA – Case study
Source: Oriental Motor USA – Case study
Source: Oriental Motor USA – Case study
Source: Oriental Motor USA – Case study
Yes. Pulse-input CVD drivers accept pulse/direction signals from a PLC positioning output, and RS-485 types can be commanded over Modbus RTU without pulse outputs.
5-phase systems have a smaller basic step angle (0.72°), giving smoother motion and lower vibration; 2-phase systems (1.8°) are the most widely used and economical. The driver must match the motor’s phase type.
Often yes, if the motor phase type and current match. Share the existing motor and driver details and we will confirm a compatible replacement.
All CVD drivers run on 24 VDC ±10 %. Size the supply for the driver model. Oriental Motor lists figures from about 0.5 A for the smallest 2-phase driver up to 4.8 A for the largest 5-phase drivers. Use a DC supply with reinforced insulation.
Up to 1 MHz from a line-driver output and 250 kHz from an open-collector output, at 50 % duty. Both 1-pulse (pulse/direction) and 2-pulse (CW/CCW) modes can be selected with a switch.
Up to 31 drivers on one Modbus RTU line, with a total bus length of up to 10 m. Each driver stores up to 256 operation data points, so the PLC only selects and starts moves.
Not beyond the motor's mechanical accuracy of about ±0.05°. Higher resolution gives smoother, quieter motion and finer command increments. CVD drivers' precise current control helps stop accuracy when microstepping, but for guaranteed position you need an encoder or a closed loop system.
Standard pulse-input drivers are either 2-phase or 5-phase models. The CVD4A-KED 4-axis EtherCAT driver can run 2-phase and 5-phase motors together on its four axes.
High-torque, low-vibration 2-phase stepper motors with encoder and geared options.
Closed-Loop MotionClosed-loop stepping motor with a battery-free ABZO mechanical absolute sensor.
ControllersMulti-axis controllers and network-compatible drivers for stepper and servo systems.