Overview
NDM872 is a digital two-phase hybrid motor drive launched by Noketech. It adopts the latest DSP technology of Ti, and taking advanced digital filtering technology, anti-resonance technology and real-time precision current control technology to make it realize precise smooth operation, extra low noise. It’s especially suitable for semiconductor, electronic processing equipment, laser processing, medical equipment and small CNC equipment.Applicable drive motor: 60、86 series two-phase hybrid stepping motor.
Parameter setting switch description
1）Working (dynamic) current setting
Output peak current | Output average current | SW1 | SW2 | SW3 |
Default | C | on | on | |
2.4A | 1.7A | off | on | on |
3.2A | 2.26A | on | off | on |
4.0A | 2.83A | off | off | on |
4.8A | 3.40A | on | on | off |
5.6A | 3.96A | off | on | off |
6.4A | 4.52A | on | off | off |
7.2A | 5.09A | off | off | off |
2）Quiescent (static) current setting
The static current can be set by the instruction ACR=X. X=50 indicates that the static current is set as half of the dynamic current, and X=100 indicates that the static current is same as the dynamic current.
In general use,SW4 should be set to on to reduce the heat of the motor and drive and improve the reliability.
About 0.4s after the pulse train stops , the current is automatically reduced to about half (60% of the actual value), and the calorific value is theoretically reduced to 36%.
3）Micro step setting
Steps/REV | SW5 | SW6 | SW7 | SW8 |
Default | on | on | on | on |
400 | off | on | on | on |
800 | on | off | on | on |
1600 | off | off | on | on |
3200 | on | on | off | on |
6400 | off | on | off | on |
12800 | on | off | off | on |
25600 | off | off | off | on |
1000 | on | on | on | off |
2000 | off | on | on | off |
4000 | on | off | on | off |
5000 | off | off | on | off |
8000 | on | on | off | off |
10000 | off | on | off | off |
20000 | on | off | off | off |
25000 | off | off | off | off |
Wiring Case
Typical wiring diagram when using PLC cotrol
Typical wiring diagram when the controller is a PLC
Electrical, Mechanical and Environmental Indicators
1. Electrical indicator
Description | NDM872 | |||
Min. | Typical | Max. | Unit | |
Output current | 1 | - | 7.2 | A |
Working voltage | 30 | 48 | 80 | VDC |
Control signal input current | 7 | 10 | 16 | mA |
Pulse frequency | 0 | - | 200 | kHz |
Insulation resistance | 500 | MΩ | ||
Note: The control pulse frequency can be adjustable according to user application requirements. The maximum control pulse signal that can be received is 1MHz.
2. Using environment and parameters
Cooling method | Free cooling or forced air cooling | |
Using environment | Places | Do not install it near other hot equipment.. To avoid the places with dust, oil, corrosive gas, high humidity and strong vibration, combustible gas and conductive dust are prohibited. |
Temperature | 0-50℃ | |
Humidity | 40-90%RH | |
Vibration | 5.9m/s2MAX | |
Storage temperature | -20℃~80℃ | |
Weight | 420g | |
3. The way to improve heat dissipation
1）The reliable working temperature of the drive is usually within 60℃, and the working temperature of the motor is within 80℃;
2）To reduce the heat of the motor and drive, it is recommended to select the automatic half-current mode when using that he current decreases by half automatically when the motor stops.
3）When installing the driver, please install it vertically and sideways, so that the heat sink teeth forms strong air convection; when necessary, install a fan near the drive for better heat dissipation, to ensure that the drive works within a reliable operating temperature range.
Mechanical installation drawing (unit: mm)
