1. Products Overview
Step motor is a motor that converts the electrical pulse signal
into the corresponding angle displacement. For each of the pulse
signal, the rotor rotates a certain angle accordingly, and the
speed is proportional to the input pulses’ frequency. Therefore,
step motor is also called pulse motor.
The biggest difference between step motor compared to other control
motors is that it receives digital control signals (pulses) and
converts into angle displacement accordingly. Enter a pulse signal
to get a specified position increment. Compared with the
traditional DC control system, such a so-called incremental
position control system, the stepper system complexity and cost are
significantly reduced. The angular displacement of the stepping
motor is strictly proportional to the number of input pulse, and it
is synchronized with the pulse in time. Therefore, by controlling
the pulse frequency and pulse quantity, the motor shaft speed, and
position can be controlled precisely too.
At the same time, Kaifull has solved many problems of traditional
stepper drivers buy the latest patented technologies. There are
many middle and high end customers globally, and they highly
appreciate our stepper motor and drives very much.
Although the stepper motor and its control technology are currently
very mature, if not used properly, there may still be a situation
of step loss, i.e. position error. Next, we will analyze the common
causes and solutions of position errors.
The reasons for the position error of stepper motors
Large load inertia
When the inertia of the load driven by the stepper motor is large,
its inertia will generate inertia force, causing the current
waveform output by the stepper motor controller to be inconsistent
with the actual required current waveform, resulting in inaccurate
position of the stepper motor.
The stepper motor driver is not set correctly
Incorrect settings of the stepper motor driver, such as fine
fraction, step angle, and other parameter settings, can also lead
to an increase in the position error of the stepper motor.
The pulse signal output by the stepper motor controller is unstable
When the pulse signal output by the stepper motor controller is
unstable, it can lead to inaccurate position of the stepper motor.
This situation is more common when using long-distance transmission
of control signals.
The stepper motor is damaged
The rotor or stator of the stepper motor may be damaged, or the
bearings may be damaged, which can lead to positional errors in the
stepper motor.
Methods to solve the position error of stepper motors
Control load inertia
The position error of the stepper motor can be reduced by reducing
the load inertia. For example, when driving a stepper motor with
inertia loads, methods such as installing shock absorbers and
changing the load inertia mode can be used to reduce the load
inertia.
Set the driver parameters correctly
Correctly set the subdivision and step angle parameters of the
stepper motor driver to ensure the position accuracy.
Stable output pulse signal
High precision pulse generators or adjustable filters can be used
to stabilize the output pulse signal and reduce the position error
of stepper motors.
Replace damaged stepper motor components
When the stepper motor is damaged, it is necessary to replace the
corresponding components in order to restore the normal operation
of the stepper motor.
Target Applications of Kaifull PRMCAS Hybrid Stepper Motors
Kaifull hybrid stepper motors are mainly used in digital control
systems, with high accuracy and reliable operation. If position
detection and speed feedback are used, closed-loop control can also
be achieved. Stepper motors have been widely used in digital
control systems, such as digital to analog conversion devices, CNC
machine tools, computer peripherals, automatic recorders, clocks,
etc. In addition, they have also been applied in industrial
automation production lines, printing equipment, etc.
The application scenarios of Kaifull stepper motors are very wide,
and the following are some application examples:
Industrial field: Stepper motors are used in automotive instrumentation, machine
tool automation production equipment, robot manufacturing,
inspection, and process flow.
Security field: Used for monitoring products, such as PAN/ZOOM/TILT
for security cameras.
Medical field; Hydraulic pumps, ventilators, and blood analyzers
used in medical scanners, samplers, digital oral photography.
In the field of consumer electronics, it is used in various stages of electronic product production,
such as solder paste printing, SMT placement, reflow soldering,
visual inspection, production of cables with terminals, dispensing
machines, screen laminating machines, 3D printers, etc.
Precision equipment and instruments: used in ATM machines, inkjet printers, engraving machines, photo
machines, spray painting equipment, computer peripherals and
massive data storage devices, precision instruments, industrial
control information systems, office automation, robots and other
fields, especially suitable for applications with smooth operation,
low noise, fast response, long service life, and high output
torque.
Textile machinery: It is widely used in textile machinery equipment such as
computerized embroidery machines. These stepper motors have the
characteristics of low torque retention, fast response speed, low
operating noise, stable operation, good control performance, and
low overall cost.
Flat mobile devices: such as laser cutting machines, printers, scanners, etc.
Measurement instruments: such as high-precision 3D scanners,
optical measurement equipment, etc.
Medical equipment: used for medical and surgical instruments, etc.
Camera lens. Used for focusing and moving optical devices, etc.
These application scenarios typically require stepper motors to
have characteristics such as high precision, low noise, fast
response, and long lifespan to meet the positioning, control, and
performance requirements of different industries.
2. Hybrid Stepper Motor General Technical Specifications
| Step Angle | 1.8° (2 Phase) |
| Step Angle Accuracy | 0.09° |
| Shaft Type | Single shaft, Dia. 14.0 or 12.7mm (Customizable) |
| Max. Temperature Rise | Less than 80 °C (Rated Current) |
| Max. Surface Temperatures | Max Allowed 100℃ |
| Ambient Temperature | -20 °C ~ +50 °C |
| Insulation Grade | 100 MΩ Min. , Class B |
| Dielectric Strengt | 500 VAC for 1 Minute |
| Max. Axial Load | 60N |
| Max. Radial Load | 320N (20mm from mounting Surface) |
| Certificates | Rohs, CE, CCC (As per Customer Need) |
3. Hybrid Stepper motor Performance Datasheet
| Model | Current | Resistance | Inductance | Holding Torque | Detent Torque | Rotor Inertia | Bi/Unipolar | Weight | Length |
| A/Ø | Ω/Ø | mH/Ø | N.m | N.cm | g.cm2 | # of Leads | kg | mm |
| 86HS650-4004S-96-12.7K | 4.0 | 0.9 | 8.6 | 6.5 | 13 | 2500 | Bi (4) | 3.0 | 95.5 |
4. Mechanical Dimensions (in mm)
5. Wiring Diagram
6. Torque Speed Curves
