User’s Manual For FD542 Digital 2-Phase Stepper Driver User’s Manual For FD542 Digital 2-Phase Stepper Driver
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motor rotates in a particular angle called the step angle. Therefore calls Stepping motor
which is characterized by no cumulative error. Receive each a pulse of electric from
controller, the motor is driven at a fixed angle by the diver, So it is widely used in various
open loop control.
The stepping driver is a power amplifier that enables the stepping motor to run, It
can convert the pulse signal from the controller into the power signal of the stepping
motor. The speed of the motor is proportional to the pulse frequency, So the control pulse
frequency can be adjusted precisely speed, the number of control pulses can be accurately
positioned.
2）What is the drive resolution? What is the relationship between the speed of
the stepping motor and the pulse frequency?
Because of its unique structure, the stepping motor is marked with the inherent step
angle when it leaves the factor. The step angle such as 0.9 degree/1.8 degree, it means
that the angle turned by each step of the half-step work is 0.9 degree, and the full-step is
1.8 degree. However, in many precision control situations, the angle of the entire step is
too large, which affects the control accuracy and the vibration is too large. Therefore, it is
required to complete a motor’s inherent step angle via in many subdivision steps. This is
the so-called subdivision drive, the electronic device capable of this function is called a
micro-step resolution driver.
V：Motor Speed(r/s)
P：Pulse frequency(Hz)
θe：Motor inherent step angle
m：Number of subdivisions(1 for full-step, 2 for half-step)
3）What are the benefits of subdivision driver?
●Reduce the step angle of each step, improve the step uniformity, so the control accuracy
can be improved.
●The method can make the rotor run smoothly, so this method can be considered as one
of the effective methods to reduce vibration at low speed.
●Can effectively reduce torque ripple and increase output torque.
4）Why does my motor only turn in one direction?
●The direction signal may be too weak, or the wiring polarity is wrong, or the signal
voltage is too high which lead to burn-out direction current limiting resistor.
●The pulse mode does not match, The signal is in the pulse/direction, So the driver must
be set to this mode. If the signal is CW/CCW(double pulse mode), the driver must also be
in this mode, otherwise the motor will only run in one direction.
Product warranty terms
1.Twelve Month Limited Warranty
Changzhou Fulling Motor Co, Ltd. Warrants its products against defects in materials
and workmanship for a period of 12 months from shipment out of factory. During the
warranty period, Fulling Motor will either, at its option, repair or replace products
which proved to be defective.
2 Exclusions
The above warranty does not extend to any product damaged by reasons of improper or
inadequate handlings by customer, improper or inadequate customer wiring, unauthorized
modification or misuse, or operation beyond the electrical specifications of the product
and/or operation beyond environmental specifications for the product. And poor ambient
heat dissipation.
3 .Obtaining Warranty Service
If your product fail during the warranty period, need to obtain a returned material
authorization number before returning product for service. Please include a written
description of the problem along with contact name and address.
4 .Warranty Limitations
●The warranty coverage of the product is limited to the device and process (i.e.
consistency)
●Fullingmotor specifically disclaims the implied warranties of merchantability and
fitness for a particular purpose. Because the suitability is also related to the technical
indicators of the use and the conditions of the use and environment.
