TC8642 two-phase hybrid stepping motor driver dedicated to electric selection platform | Motor Driver

TC8642 two-phase hybrid stepping motor driver dedicated to electric selection platform | Motor Driver

I. overview

---typeSubdivision type two-phase hybrid stepping motor driver, using DC18~50VPower supply, suitable for driving voltage24V~50VThe current is less than4.0Aexternal diameter42~86MillimeterTwo-phase hybrid stepping motor. The actuator adopts full digital current loop for subdivision control. The motor has small torque fluctuation, stable operation at low speed and low vibration and noise. High speed can output relatively high torque and high positioning accuracy. Widely used in engraving machines, CNC machine tools, packaging machinery, transmission equipment and other equipment with high resolution requirements.

Main features:

1 Average Current Control, Two Phase Sine Current Driven Output

2 DC 18~50V power supply

3Photoelectric Isolation Signal Input/Output

4 Overvoltage, undervoltage, overcurrent and inter-phase short circuit protection functions

Fifty-six-grade subdivision and automatic half-flow function

6-8 output phase current setting

7 has offline function

8. High starting speed

9 High Speed Torque

I. Electrical parameters

II. Control Signal Interface

Figure 1 is the wiring schematic of the driver.

1. Control signal definition

PLS/CW+: Stepping Pulse Signal Input Front End or Forward Stepping Pulse Signal Input Front End

PLS/CW-: Stepping Pulse Signal Input Negative End or Forward Stepping Pulse Signal Input Negative End

DIR/CCW+: Stepping direction signal input front end or reverse stepping pulse signal input front end

DIR/CCW-: Stepping direction signal input negative end or reverse stepping pulse signal input negative end

ENA+: Offline enabling reset of signal input front end

ENA-: Offline enabling reset of signal input negative end

When the off-line enabling signal is valid, the driver fault is reset, any valid pulse is prohibited, the output power component of the driver is closed, and the motor has no holding torque.

2. Control signal connection

The control signal of the host computer can be either high-level or low-level. When it is highly effective, the negative ends of all control signals are connected as signals, while the positive ends of all control signals are connected as common ends of signals when it is inefficient. Now take collector open circuit and PNP output as an example, the schematic diagram of the interface circuit is as follows:

Fig. 1. Open-circuit output of collector for input interface circuit (common anode connection) controller

Figure 2. PNP output of input interface circuit (common cathode connection) controller

Note: When VCC value is 5V, R is short.

When VCC value is 12V, R is 1K, greater than 1/8W resistance.

When VCC value is 24V, R is 2K, greater than 1/8W resistance.

R must be connected to the controller signal terminal

III. Functional Choice(on the drive panel)DIPSwitch implementation)

1Setting up the number of motor steps per revolution

Drivers can set the number of steps per turn to 400, 500, 800, 1000, 1250, 1600, 2000, 2500, 3200, 4000, 5000, 6400, 8000, 10000, 12800 steps respectively. Users can set the number of steps of the driver through SW5, SW6, SW7, SW8 bits of the dial switch on the front panel of the driver (as shown in the table).1):

surface1

2Selection of control mode

The dial switch SW4 bit can be set in two control modes:

When set to "OFF", it has half-stream function.

When set to ON, it has no half-stream function.

3. Setting Output Phase Current

In order to drive stepper motors with different torques, users can set the output of the driver through the dial switches SW1, SW2 and SW3 bits on the driver panel.mutuallyCurrent (RMS) unit ampere, the output current corresponding to each switch position, the output current corresponding to different types of drivers is different. Specific table2

Half-stream function refers to stepless pulse 500MSAfter that, the output current of the driver is automatically reduced to 70% of the rated output current, which is used to prevent the motor from heating.4.Half flow function

IV. Power Interface

1, +V, GND: Connect driver power supply

+V:straightflowPower supply positive stage, power supply voltage straightFlow 16~50V The maximum current is 5.A.

GND:straightflowThe power supply is negative.

2. A+A-B+B-: Connecting two-phase hybrid stepping motor

Driver and two-phase hybrid stepping motor are connected by four-wire system. Motor windings are connected in parallel and series. Parallel connection method has good high-speed performance, but the driver current is high.(For motor winding current1.73times),

Driver current is equal to motor winding current in series connection.

V. Installation

Surrounding should have 20 mm space, can not be placed next to other heating equipment, to avoid dust, oil mist, corrosive gas, humidity and strong vibration places.

Six Fault Diagnosis

1. State light indication

RUNGreen light, turn on normally.

ERRRed light, when fault occurs, short circuit, over-voltage protection and under-voltage protection of motors.

2. Troubleshooting

Driver wiring

A complete stepper motor control system should include stepper driver, DC power supply and controller (pulse source). The following is a typical system wiring diagram: