Suppose that the controller’s idle clock is a straight low signal, so by creating an RC circuit that ensures that the TQ pins remains high while there’s a signal and will eventually go to low when the clock is idle. so if its high all the time the will heat up the stepper motor, if it’s always low ,well no torque, so it should follow up the clock signal coming from the controller, when the clock is idle it should be low, when there’s a signal it should be high, “in my case the controller is 3.3v tolerant so the voltage only will be different”Ģ- as i read in the datasheet, TQ pin controls the output torque “current”, 100% if high, 30% if low. I use a TM4C123GH6PM for interpreting Gcode and producing the signals, its a general purpose microcontroller by texas instrumentsġ- i think the optocouplers connections can be reduced, if iam using a 5 volts tolerant controller i can use only 3 pins instead of 6 pins to control DIR,CLK,EN by just connecting all those negative terminals to 2~3 volts. I’ll be thankful if you gave me a little bit of you time and patience, SW4 (LATCH) : OFF= On Fault condition required power on/off Schematic SW4 (LATCH): ON=Automatic Return if Thermal Shutdown Or Over Current Detection OCCURS CLK: Step Pulse required 5V DC TTL pulseĤ Wires, 6 Wires, 8 Wires Motors can be used with this drive in bipolar mode.Dir.: Required 5V DC input, Set high Input CW Rotation, Set low input CCW Rotation, Direction of the motor depends how stepper motor has been wired.Enable: Required 5V DC input, Set high Input disabled the drive, Set low input Enable the drive.Before using this drive, please have proper information about stepper motors, Motor impedance, Inductance and other specs.Īll Inputs are optically isolated to prevent the device for any kind of noise, short circuits.Switch the Power to set the Micro stepping.Never connect or remove supply wires, motor wires, or input interface when power is on, this can cause damage to drive.Voltage range to set the torque 0.3V to 3.5V CN7 (CT) onboard connector is provided to measure the voltage to set the motor current (torque). A positive going pulse on the step input activates a step operation.Īverage drive current can be set using a Preset (On Board PR1 Potentiometer). Minimum positive duty cycle of the input step pulse should be 2.2us and required 5V (TTL) signal. DIP Switch settings should be changed when power is off so the correct selection is active at power up. This LED goes off once the temperature falls to a safe operating level.Ī 4way DIP switch is used to set the micro step modes (Full, Half, Eight, Sixteenth), please see the table for Micro step settings. At maximum current load TB6600 IC will overheat in some time and a RED LED turns on. The board has current sense resistors and these resistors has been set as per maximum load current 4.5A, If you use lower current motor, please set the PR1-Preset ( Potentiometer) to the required level for the motor. Large capacitor to handle inrush current.Built in over current detection (ISD) circuit (IC).Built in under voltage lock out (UVLO) circuit (IC).Standby auto half current reduction circuitry onboard.Maximum Input supply 42V DC Minimum Input supply 10V DC.Forward and reverse rotations available.Suitable for 4Wires, 6 wires and 8 wires stepper motor.Suitable for Nema17, Nema23, Nema34 bipolar stepper motors.
Based on Single chip and Second chip for auto half current control.The TB6600HG is PWM chopper type single chip bipolar sinusoidal micro-step stepping driver. Bipolar stepper drive board described here has been designed around TB6600HG IC.