DS-OLS2-FPD_Technical Manual
19Pages

DS-OLS2-FPD Digital Stepper Drive Technical Manual Technical Manual DS-OLS2-FPD Digital Stepping Driver

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1. Introduction The DS-OLS2-FPD is a new digital stepper drive based on DINGS’’s widely implemented DM stepper drives (10+ millions of units in field). While retaining features of simple design, easy setup, high precision and reliability, DINGS’ has also upgraded it by adopting the latest stepper control technology and added additional advanced features for better torque (10-25%), quicker response time, control command smoothing, easy self-test, etc. The DS-OLS2-FPD is able to power 2 phase (1.8°) and 4 phase (0.9°) stepper motors smoothly with very low motor heating & noise. It can take...

2. Specifications 2.1 Electrical Specifications Parameters Output Current Supply Voltage Logic signal current Pulse input frequency Minimal pulse width Minimal direction setup Isolation resistance Natural Cooling or Forced cooling Avoid dust, oil fog and corrosive gases Environment Ambient Temperature Operating Temperature Operating Environment Vibration Storage Temperature 2.3 Mechanical Specifications (unit: mm [1inch=25.4mm]) Figure 1 Mechanical specifications * Side mounting recommended for better heat dissi

2.4 Elimination of Heat  DS-OLS2-FPD’s working temperature is less than 60℃ (140°F)  It is recommended to use automatic idle-current mode to reduce motor heating. That means set the SW4 pin of DIP switch at “OFF” position.  It is recommended to mount the drive vertically to maximize heat sink area. Use forced cooling method to cool if necessar

Connection Pin Assignment and LED Indication 3. Connection Pin Assignments and LED Indication 3.1 P1 – Control Connector Configurations PIN Pulse Connection: Required. (1) 5-24V, optically isolated, differential. (2) Maximum 200KHz input frequency. (3) Pulse width of 2.5μs or longer. (4) In single pulse (step & direction) control mode, this input signal represents a pulse which is active at the rising or falling voltage edge (set by DIP switch SW13); in double pulse (CW/CCW) control mode, this input signal represents clockwise (CW) pulse which is active at both high voltage level and low...

Connection Pin Assignment and LED Indication Connect to power supply ground connection. Connect to power supply positive connection. Suggest 18-36VDC power supply voltage Don’t plug/unplug P3 or any P1/P2/P4 terminal block to avoid drive damage or injury while powered on. Connect to motor A+ wire Connect to motor A- wire Connect to motor B+ wire Connect to motor B- wire 3.5 Status LED Lights There are two LED lights for DS-OLS2-FPD. The GREEN one is the power indicator which should be always on in normal circumstance. The RED one is a drive status indication light, which will be OFF while...

Control Signal and Fault Output 4. Control Signal and Fault Output 4.1 Control Signal Connection The DS-OLS2-FPD can accept differential or single-ended control signals (pulse, direction, and enable) in open-collector or PNP connection through the P1 connector (figure 2). It is recommend to add an EMI line filter between the power supply and the drive to increase noise immunity for the drive in interference environments. Figure 3 Connections to open-collector signals (Common-anode) Figure 4 Connections to PNP signals (Common-cathode) 4.2 Fault Output Connection When over voltage or over...

Stepper Motor Connections 5. Stepper Motor Connections DS-OLS2-FPD can drive 2-phase and 4-phase bipolar hybrid stepper motors with 4, 6, or 8 wires. Although setting the output current to 1.4 times of motor phase current will get maximum torque from the motor, at the same time motor heating will be also maximized. So, just configure the drive output current to a value which will get sufficient torque to reduce motor heating. 5.1 4-lead Motor Connection Refer to figure 7 for how to connect a 4-wire stepper motor. Configure DS-OLS2-FPD output current to one of the 8 available values through...

Stepper Motor Connections 5.3 8-lead Motor Connection DS-OLS2-FPD can power 8-lead in series or parallel connection in series or parallel. 5.3.1 Series Connection Series connected 8-lead stepper motors are typically implemented in applications which higher torque at lower speed movement is required. Because a stepper motors under series connection has the most inductance, the performance will start to degrade when the motor runs at higher speed. For this connection, it is suggested to set an DS-OLS2FPD’s output RMA current to no more than 70% of the stepper motor’s phase current to prevent...

Power Supply Selection 6. Power Supply Selection DS-OLS2-FPD is designed to power small and medium size stepping motors (frame sizes NEMA 8 to 17) made by DINGS’ or other motor manufacturers. To get optimal performances, it is important to select proper power supply type, voltage, and supply output current. In general power supply voltage determines the high speed performance of a stepper motor, while drive output current determines the driven motor torque output. Higher supply voltage can increases motor speed torque performance, but at the same time result in more noise and motor heating....

7. DIP Switch Configurations Each DS-OLS2-FPD has two 2-bit DIP switch selectors. The first one is located on the side (DIP switch selector 1 in Figure 2) and used to configure settings of micro step resolution, output current, and motor standstill current as shown below: 7.1 Output Current Configuration The DS-OLS2-FPD has 8 micro step settings which can be configured through DIP switch SW1, SW2 and SW3. For a given stepper motor, higher drive output current will make it output higher torque, but at the same time cause more heating for both the motor and drive. Therefore, output current is...

7.2 Micro Step Configuration Each DS-OLS2-FPD has 8 micro step settings which can be configured through DIP switch SW4, SW5, SW6. See the following table for detail. Micro step 7.3 Pulse Mode Configuration DIP switch SW7 is used to configure the control mode of DS-OLS2-FPD. By default it is set to OFF position for single pulse (step & direction, or pulse & direction) control. To change the control model to double pulse (CW/CCW) control type, set its position to OFF. 7.4 Self – Test Configuration For test and system diagnosis purpose, EM442 is featured with Self-Test. Anytime DIP switch SW8...