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Package Include:
- 1 × CNC GRBL Shield Board V3 Expansion Board
- 4 × DRV8825 Stepper Motor Driver with Heatsink
Product Description
The expansion board can be used as a drive expansion board for engraving machines, 3D printers, etc. There are a total of 4 slots for stepper motor modules, which can drive stepper motors, and each stepper motor only needs 2 IO ports, also That is to say, 6 IO ports can manage 3 stepping motors well, which is more convenient to use and bid farewell to the tedious operation of traditional stepping motors.
CNC GRBL Shield Board V3 Expansion Board
Introduction of the corresponding relationship between UNO and module IO port
UNO-------------Expansion Board
- 8-------------EN (stepping motor drive enable terminal, active low)
- 7-------------Z.DIR (direction control of Z axis)
- 6-------------Y.DIR (direction control of Y axis)
- 5-------------X.DIR (direction control of X axis)
- 4-------------Z.STEP (step control of Z axis)
- 3-------------Y.STEP (Y-axis step control)
- 2-------------X.STEP (step control of X axis)
- Experimental Phenomenon: the stepper motor reverses one circle, pauses for one second, and then rotates forward one circle, and so on
- Attention: When inserting the stepper motor, be careful not to insert it backwards.
- The wiring method of the stepper motor is: 2A, 2B are a group (red, green), 1A, 1B are a group (blue, yellow).
- I fusers want to change Direction, change the position of one of the groups, such as 2A and 2B exchange.
Features and advantages over A4988
- Current up to: 4.5A
- Supports up to: 32 subdivisions
- 4-layer PCB board, good heat dissipation performance
- The internal resistance of the chip is smaller, the heat generation is low, and the heat dissipation performance is good.
DRV8825 Stepper Motor Driver with Heatsink
Product Description
- The DRV8825 stepper motor driver module has a pinout that is almost identical to the interface and the A4988 stepper motor carrier, so it can be used as a higher performance replacement in many applications.
- DRV8825 has adjustable current limit, overcurrent and thermal protection, 6 micro resolutions (1, 1/2, 1/4, 1/8, 1/16, 1/32). It uses 8.2-45V and can provide Up to about 1.5 per phase or forced air flow (rated up to 2.2 per roll with sufficient additional cooling).
Features
- Simple steps and directional control interface
- Six product segments: 1, 1/2, 1/4, 1/8, 1/16, 1/32
- CAN interface directly with 3.3V and 5V systems
- Over temperature and over current shutdown protection, under voltage lockout
- Short-to-ground short-circuit load protection
- 4-layer 2oz copper PCB for improved heat dissipation
- Exposed ground pads on the bottom of the PCB for soldering below the driver IC
- Adjustable current control allows setting a potentiometer, which allows the use of a stepper motor with a voltage above the rated voltage to achieve higher step rates to output large currents
- Intelligent chopper control automatically selects the correct current decay mode (fast decay and slow decay)
- Stable 45V supply voltage
- Built-in voltage regulator (requires any external logic supply voltage)
Pelican
Reviewed in the United States on July 30, 2024
This standard Arduino CNC shield is somewhat dated now as 32 bit processors are taking over. But for simple, lower powered projects it’s still useful. You receive exactly what is described including a Protoneer vers 3.00 shield and 4 DRV8825 stepper drivers with their usual wimpy heat sinks. This board does support an additional A axis. The shield is well soldered and appears to be solid, and the drivers are fine for the max 2A NEMA 17 motors that I am using. However, that is exactly what you get and nothing more. There is no documentation with the product and the Amazon description is not very useful. For example, they warn you not to insert the drivers backwards which is excellent advice, but they don’t define “backwards” and there are no pictures or other views to determine the orientation. There is a great deal of information on the internet but unfortunately some of it is contradictory and some is flat wrong. If this was my first stepper project I think it might be difficult to set up this device, so if anyone needs it, here are a couple of reliable sources of information on what they didn’t tell you about how to get your motors moving.Since links cannot be added to reviews, just search online for “Maker Store CNC Shield Guide” which is a 13 page pdf that provides an excellent description of installing and connecting this specific shield with these drivers, including how to set microsteps with jumpers if you want to use them rather than the default full step (no jumpers are included with the board). However, one critical thing that this guide does NOT mention is setting the Vref for each driver. Failure to limit the amps as needed for your motor is probably the main reason for failures and short life spans of these drivers and shields. I run my motors in full-step mode, and a current limit of 1.5 amps provides good performance with out stressing either driver or motor, so I set the trimmers to 750 mV (and use a fan on the drivers). Remember to turn the pot fully counterclockwise to minimize Vref before starting. The best, most detailed explanation of this topic that I have seen on the internet is a YouTube video called “Setting the Current Limit on Pololu Stepper Motor Driver Carriers”. If you haven’t set up stepper motors before, I recommend that you watch that video before you do anything too drastic like … applying power to your new board :) Too bad the vendor doesn't provide any information, but with a little care in set up this shield can work well.
Ken
Reviewed in the United States on October 31, 2023
Got it in time
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