Stepper Motors > Stepper Motor Only > 2-Phase Stepper Motors > PKP Series 2-Phase Bipolar Stepper Motors
PKP Series 2-Phase Bipolar Stepper Motors
PKP Series 2-Phase Bipolar Stepper Motors
High-torque, 2-phase bipolar stepper motors and geared type stepper motors offer the optimum performance and value. In addition to offering high torque, the PKP series stepper motors offer more variety of electrical specifications, more frame sizes, encoder options and electromagnetic brake options for the right solution in stepper motors.
- Offers 1.2 ~ 1.7 Time More Torque
- 1.8° (200 pulse/rev) & 0.9° (400 pulse/rev)
- Spur Gear or Planetary Gear Types
- Flat Motor types with or without Harmonic Gear available for space saving and greater inertia matching
- Bipolar (4 lead wires)
- Encoders - 200, 400 or 1000 Lines of Resolution
- Electromagnetic Brake Type
- Bipolar Stepper Motor Drivers Available
Stepper Motor Lineup
Frame Size |
Motor Types |
Available Options |
Current per Phase |
Lead Wires |
Max. Holding Torque |
|
|
Standard Type (1.8°) |
Encoder |
0.5 or 0.6 A |
4 |
2.8 ~ 5.1 oz-in |
0.02 ~ 0.036 N·m |
|
Standard Type (1.8°) |
Encoder |
1.5 A |
4 |
13.4 ~ 26 oz-in |
0.095 ~ 0.19 N·m |
High-Resolution (0.9°) |
Encoder |
12.2 ~ 23 oz-in |
0.086 ~ 0.165 N·m |
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Geared Type |
Encoder |
42.5 ~ 112 oz-in |
0.3 ~ 0.8 N·m |
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|
Standard Type (1.8°) |
Encoder |
0.85 ~ 1.5 A |
4 |
28 ~ 52 oz-in |
0.2 ~ 0.37 N·m |
|
Standard Type (1.8°) |
Encoder |
0.28 ~ 2.3 A |
4 |
14.2 ~ 140 oz-in |
0.1 ~ 0.99 N·m |
High-Resolution (0.9°) |
0.67 ~ 1.5 A |
42 ~ 116 oz-in |
0.3 ~ 0.82 N·m |
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Geared Type |
Encoder |
1.5 or 2.3 A |
28 ~ 2,544 oz-in |
0.2 ~ 18 N·m |
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|
Standard Type |
- |
2.3 A |
4
|
14.2 oz-in |
0.1 N·m |
Geared Type |
255 ~ 339 oz-in |
1.8 ~ 2.4 N·m |
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|
Standard Type (1.8°) |
Encoder |
0.71 ~ 4.2 A |
4 |
105 ~ 440 oz-in |
0.74 ~ 3.1 N·m |
High-Resolution (0.9°) |
1.4 ~ 2.8 A |
99 ~ 320 oz-in |
0.7 ~ 2.3 N·m |
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Geared Type |
Encoder |
1.4 ~ 4.2 A |
140.8 ~ 6,224 oz-in |
1 ~ 44 N·m |
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|
Standard Type |
- |
1.5 A |
4 |
25.5 oz-in |
0.18 N·m |
Geared Type |
30 ~ 44 lb-in |
3.5 ~ 5 N·m |
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|
Standard Type (1.8°) |
- | 4.5 ~ 6.3 A |
4 |
467 ~ 1345 oz-in | 3.3 ~ 9.5 N·m |
Geared Type |
- |
2,096 ~ 16,992 oz-in |
14.85 ~ 120 N·m |
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*Geared stepper motor frame size.
Standard Type Stepper Motors (1.8°/Step)
- 0.79 in. (20 mm)
- 1.10 in. (28 mm)
- 1.38 in. (35 mm)
- 1.65 in. (42 mm)
- 2.22 in. (56.4 mm)
- 3.35 in. (85 mm)
High-Torque PKP Series Stepper Motors
After revising the magnetic design and structure design of the PKP Series, it produces much more torque than the conventional motors of the same size. In addition, torque can be increased in the high-speed range by using high current motors.
Reduced Power Consumption and Heat Output
If the running current of a PKP Series stepper motor is decreased and the motor is operated at the same torque as the PK Series standard type, current consumption and heat output can be reduced.
Characteristics Diagrams of Decreased Running Current in PKP Series Stepper Motors
Power Consumption Reduced by 20% (at low speed)
Comparison of driver power consumption when low speed torque is tailored to the PK Series standard type stepper motor.
Temperature Increases of 10°C (18°F) and More are Suppressed
Comparison of stepper motor surface heat output when low-speed torque is tailored to the PK Series standard type
Downsizing
The PKP Series stepper motors provide torque equivalent to a stepper motor of the next larger frame size, contributing to downsizing of equipment.
Flat Type
- 1.65 in. (42 mm)
- 2.22 in. (56.4 mm)
Flat and lightweight design. The motor can be installed in a narrow space by being flatter.
Harmonic Gear with 50:1 and 100:1 gear ratio available for 2.36 in. (60 mm) frame size.
Utilizing Hybrid Stepper Motor Technology
A hybrid stepper motor is a combination of the variable reluctance and permanent magnet type motors. The rotor of a hybrid stepper motor is axially magnetized like a permanent magnet stepper motor, and the stator is electromagnetically energized like a variable reluctance stepper motor. Both the stator and rotor are multi-toothed.
A hybrid stepper motor has an axially magnetized rotor, meaning one end is magnetized as a north pole, and the other end a south pole. Toothed rotor cups are placed on each end of the magnet, and the cups are offset by half of a tooth pitch.
High-Resolution Type Stepper Motors (0.9°/step)
- 1.10 in. (28 mm)
- 1.65 in. (42 mm)
- 2.22 in. (56.4 mm)
Increased Resolution (Compared to Standard Type)
The number of rotor teeth has doubled to 100 compared to 50 with the standard type stepper motor. As a result, the basic step angle becomes 0.9°/step which is half that of the standard type stepper motor.
These high resolution stepper motors have half the step angle of standard stepper motors. The high resolution type increases motor resolution from 200 steps/revolution to 400 steps/revolution. Smaller step angles can be achieved by half-step driving or microstep driving. Other than having twice as many rotor teeth as standard stepper motors, all other structures are exactly the same as standard stepper motors.
Improved Stopping Accuracy (Compared to Standard Type)
The stopping accuracy improves as the torque increases while minimizing the negative effect of the frictional load.
Downsizing
The PKP Series stepper motors provide torque equivalent to a stepper motor of the next larger frame size, contributing to downsizing of equipment.
Avoidance of Resonance Regions
If the pulse speed is within resonance region, vibration may increase. Resonance regions can be avoided by switching to a 0.9° high-resolution type stepper motor.
SH (Spur with Offset Shaft) Geared Type Stepper Motors
- 1.10 in. (28 mm)
- 1.65 in. (42 mm)
- 2.36 in. (60 mm)
Broader Permissible Speed Range than Conventional Products
The New SH geared lineup now offers up to 60% more speed than current conventional models and is effective for increasing torque, achieving higher resolution and reducing vibration.
Backlash Accuracy Guaranteed
Backlash, which was a reference value in conventional models, is now a specification value.
Unit = arc min (degrees)
Frame Size |
Gear Ratio |
3.6 |
7.2 |
9 |
10 |
18 |
36 |
28 mm (1.10 in.) |
- |
90 (1.5°) |
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42 mm (1.65 in.) |
90 (1.5) |
60 (1°) |
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60 mm (2.36 in.) |
70 (1.17) |
45 (0.75°) |
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CS (Spur with Center Shaft) Geared Type Stepper Motors
- 1.10 in. (28 mm)
- 1.65 in. (42 mm)
- 2.36 in. (60 mm)
Increased Permissible Torque and Load
The CS geared type has increased torque and a large shaft for greater loads without the requirement for a larger gear frame size.
As shown in the structural drawing, by losing gears, the output shaft can be placed at the central axis.
Neugart High Torque Planetary Gear Stepper Motor (PLE)
- 1.65 in. (42 mm)
- 2.36 in. (60 mm)
- 3.54 in. (90 mm)
Higher Torque, Lower Backlash Gears
The PLE Series gearhead employs optimized planetary gear mechanism and is composed of fully hardened gears. Sun gear and planetary gears are honed (precision final machining after heat treatment). This technology guarantees extremely high torque density, long life, low backlash, and so on.
*Motor and Gearhead ship separately and must be assembled using the included gasket and screws
Backlash for Planetary Gear (PLE)
Gear |
Gear Ratio |
Backlash (arcmin) |
PLE40 |
5, 10 |
15 |
20, 40 |
19 | |
PLE60 |
5, 10 |
10 |
20, 40 |
12 | |
PLE80 |
5, 10 |
7 |
20, 40 |
9 |
Harmonic Gear Type
- 2.00 in. (51 mm)
- 2.40 in. (61 mm)
Flat Motor with Harmonic Gear
Attach the load to the surface of the flange to fix the load.
Large inertial driving is possible.
Encoder Equipped Stepper Motors (1.8° or 0.9°)
- 0.79 in. (20 mm)
- 1.10 in. (28 mm)
- 1.38 in. (35 mm)
- 1.65 in. (42 mm)
- 2.22 in. (56.4 mm)
- 2.36 in. (60 mm)
Magnetic Encoders
Magnetic encoders do not use a light emitter or a light receiver but still use a code wheel and a sensor. Instead of slits, the code wheel has alternating north and south pole magnets on the outer edge of the code wheel. The magnetic sensor senses changes in magnetic polarity when the poles pass by. The end result is the same as the output circuit outputs pulses to a PLC or HMI. Since there's no need to power the light emitter and receiver, the magnetic encoder uses less power than an optical encoder.
Magnetic encoders are more robust than optical encoders in the sense that they can operate better in humid, dusty, or dirty environments. However, magnetic encoders may not work well in an environment with magnetic interference. Magnetic encoders are also offered in rotary, linear, incremental, and absolute types. To enable a magnetic encoder to track absolute positions, multiple magnetic disks are necessary.
Detecting for Errors
An incremental encoder works by providing an A and B pulse output. The counting is done through external electronics. Here, the encoder counter is compared to the commanded position counter (third party electronics). The point where the counting begins depends on the counter in the external electronics and not on the position of the encoder.
Capable of More Accurate System Control
Monitoring the current position and detecting positional errors is possible.
By using a detection pulse guaranteed at ±0.36°, more accurate
system control is possible.
Capable of Highly Reproducible Return-to-Home
The Z-phase signal is output using the excitation home (stable point), so the home sensor (the sensor that detects the home within one rotation, installed on the motor shaft) can be used instead.
It is also easier for the Z-phase output signal and TIM output signal✽ to be used together, increasing the reproducibility of return-to-home.
A rotary encoder is an electro-mechanical device that converts the angular position of a shaft to an analog or digital code. There are two main types: absolute and incremental. Oriental Motor offers incremental types (Line Driver or Voltage (TTL equivalent)) as a standard product for our stepper motors. For an absolute encoder solution, use the AZ Series. For other standard product encoder offerings and motors that correct themselves, contact technical support for assistance.
An incremental encoder provides the incremental change in position of the encoder to the counting electronics. Stepper motors with incremental encoders make it possible to monitor the present position and detect for errors. Position monitoring can be used to detect the position of the motor. For instance, to confirm normal operations, compare commanded position to the actual position.
3-Channel Encoders
Use the Index signal for the return-to-home operation. By using the Index signal, the return-to-home point will be detected with higher accuracy than single use of the return-to-home sensor. The index channel is an optional output channel which provides one pulse per revolution.
Line Driver Output Type
The Line Driver output offers excellent noise resistance because of the differential output and is capable of longer wiring distance compared to the voltage output.
Encoder Specifications
Encoder Code |
R3E | R3F | R3J | R3EL | R3FL | R3JL |
Resolution |
200 |
400 | 1000 | 200 | 400 | 1000 |
Angular Accuracy |
±0.36° (Motor output shaft conversion value) |
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Output Circuit Type |
Voltage (TTL equivalent) |
Line Driver* |
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Output Type |
Incremental |
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Output Signals |
A-phase, B-phase, Z-phase (3 ch) |
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Power Supply Voltage |
5 VDC ±10% |
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Current |
45 mA or less |
30 mA or less |
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*26C31 or Equivalent
Electromagnetic Brake Equipped Stepper Motors (1.8° or 0.9°)
- 1.10 in. (28 mm)
- 1.38 in. (35 mm)
- 1.65 in. (42 mm)
- 2.22 in. (56.4 mm)
Electromagnetic Brake Option
These products have built-in power-off activated electromagnetic brakes. When power is accidentally cut off due to a blackout or other unexpected events, the electromagnetic brake holds the load in position to prevent it from dropping or moving. Also, when the motor is at standstill, it is held by the electromagnetic brake. It is possible to suppress the heat generated from the motor by turning off the motor current.
Product Name |
PK22 |
PKP23 · PKP24 |
PKP26 |
Type |
Power Off Activated Type |
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Power Supply Voltage |
24 VDC ± 5% |
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Power Supply Current (A) |
0.05 |
0.07 |
0.23 |
Static Friction Torque (N·m) |
0.08 |
0.3 |
1.5 |
Brake Operating Time (ms) |
20 |
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Brake Release Time (ms) |
50 |
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Time Rating |
Continuous |
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For product names, product name-identifying characters are used.
Stepper Motor Connection
Compact and Flat Connector
The PKP Series 1.65 in. [42 mm] and 2.22 in. [56.4 mm] frame size are available with a compact and flat connector, which shortens the length of the connectors overhang. In addition, the degree of freedom for the cable outlet direction has been increased because the outlet direction points upward.
Standard Motor Connector
Stepper motor lead wire connector can be inserted*1 and the locking mechanism prevents accidental removal*2
Wiring Configuration Options
- Bipolar - 4 lead wires
*1 Except for stepper motor frame size of 20 mm (0.79 in.)
*2 Only motor frame sizes of 35 mm (1.38 in.) 42 mm (1.65 in.), 56.4 mm (2.22 in.) and 60 mm (2.36 in.)
Comparison of the Flat Connector Type and the Connector Type For 2-Phase Stepper Motors
Type |
Flat Connector Type |
Connector Type |
|
Features |
Standard performance |
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Permissible Radial Load (Max. value) |
42 mm | ||
| 56.4 mm | |||
Permissible Axial Load |
42 mm | ||
| 56.4 mm | |||
Speed - Torque Characteristics |
Example of comparison of Torque characteristics with the same size motor |
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CVD 2-Phase Bipolar Drivers (sold separately)
The CVD driver offers superior performance and value and is ideal for OEM or single axis machines. The CVD series stepper motor drivers offer:
- Lowest Vibration and Noise with advanced Microstepping control
- Pulse Input or RS-485 Communications Type
- Significantly improves positional accuracy when microstepping
- Highest torque with Bipolar configuration (4 lead wire)
- Small, thin microstepping drive with space saving FETs
- Selectable step angle and microstepping filter control
- 2 mounting types and connector configuration
- Alarms
- 24 VDC Input / 0.5A to 4.5A
CVD 2-Phase / 5-Phase Multi-Axis Drivers (sold separately)
This compact, lightweight 4-axis control CVD driver reduces wiring and saves valuable space. The Multi-Axis Type CVD Series stepper motor drivers offer:
- Wiring for communication, power supply, etc., for the 4-axis, are integrated into a single-driver
- Can be used with 2-phase/5-phase stepper motors
- EtherCAT communication enables synchronous operation
- Automatically controls electromagnetic brakes using data acquired from integrated encoders, which can reduce host controller costs and program creation time
- 2 connector types options
- Alarms
- 24 VDC Input / 0.3 ~ 2.8 A/Phase
Rotary Encoders
Small, thin, and lightweight stand-alone rotary encoders with an outer diameter of ϕ30 mm can be installed in tight spaces.
Mounting Brackets
Mounting brackets are convenient for installation and securing a stepper motor or geared stepper motor.
Motor Cables (*required)
This lead wire connection cable with a conveniently crimped connector is for connector-coupled motor, and for connecting motors and drivers.
Encoder cables required for encoder type motors.
Electromagentic Brake cables required for brake type motors.
Motor - Driver Connector Cables
A cable that directly connects a connector-coupled motor and driver. A motor and driver can be directly connected using the connectors on both ends.
Stepper Motor Linear Actuator Attachment
Stepper Motor Linear Actuator Attachment is a linear motion mechanism with a lead screw and resin nut. It saves space and reduces design time compared to a custom-built mechanism. To use with 2-Phase and 5-Phase stepper motors PKP Series frame size 42mm (Round Shaft Type only).
Clean Dampers
Mechanical dampers suppress stepper motor vibration and improve high-speed performance. An inertia body and silicon gel are hermetically sealed in a plastic case.
(For use with Double Shaft motors)
Product Number Code
System Configuration
CAD / Manual Search
To locate product CAD and Operator Manuals please search using the product Item Number.
Downloads
- PKP Series Product Brochure
- PKP Series with Neugart Product Brochure
- PKP Series with 1000 P/R Encoders Brochure
Videos
Technical Articles
Reference
Videos
2-Phase Drivers (sold separately)
Multi-Axis EtherCat Compatible Drivers (sold separately)
Linear Motion Systems
Hollow Rotary Actuators
