Packaging Details
- Unit Type:piece
- Package Weight:0.02kg (0.04lb.)
- Package Size:10cm x 10cm x 10cm (3.94in x 3.94in x 3.94in)
ST820 Open Source Data:
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ST820 Stepper Motor Driver
1.Introduction:
ST820 is an integrated driver for stepper motors with a built-in converter for easy operation.The product can operate bipolar stepping motors in full, half, 1/4, 1/8, 1/16, 1/32, 1/128 and 1/256 stepping modes.
The drive provides a complete range of protection including overcurrent protection, overtemperature protection and short circuit protection.ST820 is a stepper motor driver board that is easy to use on a 3D printer.The drive has fewer external devices and requires no additional components, providing a simpler solution for stepper motor drives.
2.Parameter
1.Motor power supply voltage: 7V---45V
2.logic voltage: 3V---5.5V
3.the maximum output current: 0A---1.5A
4.the largest sub-division: 1/256 subdivision
5. drive current: adjustable
3.Driver board bitmap and pin function
4.Enter MS0, MS1, MS2 to set the drive\`s subdivision value as follows:
5.Drive current
1)Potentiometer is used to adjust the parameters of ST820 PWM current controller
Test the voltage and set the peak current input of motor phase. Clockwise rotation
Increase current, decrease current by counterclockwise rotation. The scope depends on VDD
Logical power supply voltage (pin 7 of J2), as shown in the following table:
2£© Because PWM controls the current, the minimum current can appear.
3£©The overcurrent protection of ST820 can limit the actual peak current.
6.Firmware modification method
Since the driver with 8729, A4988 and other drivers ENABLE (ENABLE)
Signals are reversed, so it is necessary to replace the above drivers with this driver
Line to modify firmware.
¨çOpen the firmware and find the ¡°Configuration.h¡±file.
¨èFound in the project file
¡°#define X_ENABLE_ON 1¡±
¡°#define Y_ENABLE_ON 1¡±
¡°#define Z_ENABLE_ON 1¡±
¡°#define E_ENABLE_ON 1¡±
Change the following value to "1".
¨éWhen you use it, if it\`s the opposite, you need to change direction. in"Configuration. h" file
¡°#define INVERT_X_DIR true¡±
¡°#define INVERT_Y_DIR false¡±
¡°#define INVERT_Z_DIR false¡±
Change "true" to "false" or "false" to "true" after the opposite axis to adjust the direction
Notes:
1, the driving ENABLE control signal with 4988, 8729
And the driver signal is the opposite, when using the driver to replace the above driver
, need to modify the firmware ENABLE signal, in the opposite direction
You also need to change the direction.
2. The indoor temperature is relatively high due to the large heat generated during the
driving operation
In the case of, please try to choose a lower subdivision or add to the driver
Hot fan prevents excessive temperature from burning the drive.Be sure to use a heatsink
and cooling fan.
3. When adjusting the potentiometer setting current, please unplug the motor to avoid
burning
Drive.
4. Do not plug and unplug the motor when it is live, so as not to damage the drive.
5. When installing heat sink, please pay attention to the gap between heat sink and pin pin
Can contact, prevent drive short circuit.
1 / 2 /4 / 5 PCS * ST820 Stepper Driver
Connect With MKS GEN V1.4:
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