
YKD2305M DSP Stepper Driver
Feature
● 32 bit DSP control technology, low noise/vibration with excellent stability and
low cost
● 16 constant-torque microstep settings, 200 microsteps the highest
● Smooth and accurate current control, effectively reduce motor heats
● 200Kpps pulse response frequency
● After step pulse stops for 200ms, output current automatically halve to
reduce motor heat
● Excellent smoothness in low frequency high microstep applications
● Photoelectric isolated signal input/output, high anti-interference ability
● Drive current adjustable (under 3A)
● Input voltage range: DC20~50V
● Fault protection: over current, over voltage, low voltage protection, etc.
● Small size: 118*76*33mm
Description
YKD2305M is high performance digital step driver based on YAKO’s new 32-bit DSP technology. It’s designed for various
models of two phase 42~60mm (NEMA 17~24) hybrid stepper motors which current are below 3A.
With servo-similar control circuit and superior software algorithm, YKD2305M has superior performance in smoothness, noise
and vibration. Smooth and accurate current control technology greatly reduces motor heat.
YKD2305M Microstep Setting
800 1600 3200 6400 12800 25600 1000 2000 4000 5000 8000 10000 20000 40000
40 0
ON ON OFF OFFOFFONON ON ON OFF OFF OFFON OFF OFF
OFF ONOFF ON ONOFFON ON ONON OFF OFF OFFOFF OFF
OFF
ON
OFF
OFF
ON OFF
ON OFF
OFF
ON
ON OFF
OFF
OFF
ON
ON
ONON
OFF
OFF OFF OFF
ON
OFF
ONONON
ON
OFF OFF
YKD2305M Current Setting
P eak 1 00A. 1 46A. 1 9 1A. 2 37A. 2 84A. 3 31A. 3 76A. 4 20A.
RM S
0.71A
ON ON ON ON
ON
ON
1.04A
ON
OFF ON OFF
1.36A 1.69A
OFF OFF
2.03A
OFF OFF OFF OFF
ON ON O FF OFF
ON OFF ON OFF
2.36A
2.69A 3.00A
Terminal Introduction
Mark Function Specification
Installation Dimensions (mm)
Side Front
Waveform Sequence Diagram
of Input Signals
PU: Pu lse si
DR:Dir e ctio n Sig n a l
MF:M o to r fr e e sig n a l
g na l
>125
Driver Connection
PWR(green)
ALARM(red)
PU+
PU-
DR+
DR-
MF+
MF-
Microstep setting
Lock currrent choice
Current setting
DC20-50V
A phase
M
B phase
Power indicator
PWR
AL ARM
Fault indicator
Pulse signal optoelectronic
PU+
isolation positive head
Pulse signal optoelectronic
PU-
isolation negative head
Direction signal optoelectronic
DR+
isolation positive head
Direction signal optoelectronic
DR-
isolation negative head
Motor free signal optoelectronic
M F+
isolation positive side
Motor free signal optoelectronic
MF -
isolation negative side
Power negative
- V
+V
Power positive
A+
A-
Motor connection
B+
B-
+A
-A
+B
-B
Caution
1. Don't connect the power reservely, the input voltage should be lower than DC50V.
2. Input control signal level is 5V, otherwise it should be connect a resistor.
3. When the alarm light is on, please cut power and check as below:
When power on, the green LED lights
When over voltage, low voltage, or even over current, the red LED lights up.
Connect with +24V or +5V signal power, it should connect with a resistor in PU- side if the
voltage over 5V.
Effects on falling edge, the motor moves one step as the pulse input change from high to low.built-
in input resistance 220Ω,Requirements: low level 0-0.5V,high level 4-5V,the pulse width>2.5us.
Connect with+24V or+5V signal power, it should connect with a resistor in DR- side if the
voltage over 5V.
Used to change motor direction. Built-in resistance 220Ω.Requirements: low level is 0-0.5V,
high level 4-5V,pulse width>2.5us.
Connect with+24V or+5V signal power, it should connect with a resistor in MF- side if the
voltage over 5V.
When effective(low level),motor is free.
DC20 -50 V
4 leads
6 leads
8 leads
(for low speed)
8 leads
(for low speed)
(1)The power voltage is under 20VDC or exceed 50VDC;
(2)Check the motor connection and the electricity circuit , then restart power supply.
4. The green PWR lights up when the driver is power on.
23 24