could I use a regular 12v dc power block or do I need to use a proper power supply?

Yeah, 12v power brick worked for me, at least for experimental stages, it'll need to have enough current (obviously) to run the motors. Current requirements also depends a bit on how your driver's are tuned and the motors your running.

Which grbl 0.9 is this shield support?the z spindle is swapped at middle of 0.9;1.7a stepper motor is currently not working after i calib vref to 0.75

This seems to work just fine with the grbl .9 at github. I'm using one of these in a drawingbot I built, but my Z is a servo and not a stepper. The XY steppers work just fine. Sorry, I could not be of more help.

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HiLetgo 2pcs V3 Engraver Shield 3D Printer CNC Expansion Board A4988 Driver Board for Arduino

HiLetgo 2pcs V3 Engraver Shield 3D Printer CNC Expansion Board A4988 Driver Board for Arduino

Product ID: 260733283

Details

Brand
HiLetgo
Item weight
0.07 Kilograms
Material
Metal
Model name
A4988
Voltage
36 Volts

🔋12-36V wide voltage range

🔌Drives 4 A4988 stepper motors

⚙️4-axis CNC & 3D printer control

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Description

⚡ Power your maker dreams with precision and expandability!

MINIMAL IO FOOTPRINT - Each stepper motor uses only two IO ports, freeing up your Arduino for other critical controls.
COMPACT DUAL PACK VALUE - Two expansion boards included, doubling your capability and saving you money—perfect for scaling your setup.
PRECISION 4 AXIS CONTROL - Seamlessly manage X, Y, Z, and a custom 4th axis for complex CNC or 3D printing projects.
WIDE VOLTAGE COMPATIBILITY - Operates efficiently from 12V up to 36V DC, ensuring robust power delivery for demanding tasks.
PLUG PLAY STEPPER DRIVER SUPPORT - Compatible with removable A4988 or DRV8825 drivers with micro-stepping up to 1/32 for ultra-smooth motion.

The HiLetgo 2pcs V3 Engraver Shield is a versatile CNC and 3D printer expansion board kit compatible with Arduino, supporting up to 4 stepper motors via A4988 drivers. It runs on a wide 12-36V DC range, offers PWM spindle control, and supports micro-stepping for smooth, precise motion. Ideal for makers and professionals looking to upgrade or build multi-axis CNC or 3D printing projects with minimal IO usage and compact design.

Specifications

ASIN	B01D2HL9T8
Best Sellers Rank	#97,672 in Computers ( See Top 100 in Computers ) #1,542 in Single-Board Computers
Brand Name	HiLetgo
Customer Reviews	4.5 4.5 out of 5 stars (280)
Item Weight	0.07 Kilograms
Manufacturer	HiLetgo
Material Type	Metal
Model	3-01-1086
Model Name	A4988
Part Number	3-01-1086-UK-2PCS
Voltage	36 Volts

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₩28864

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In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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