The ST25 - Arduino GRBL Screw Terminal Breakout Board is easy to assemble with minimal soldering skills. Fits on the Arduino UNO well with little fuss. I'm using the ST25 - Arduino GRBL Screw Terminal Breakout Board to power the two stepper motors on my CNC lathe. Using GRBL 1.1 the ST25 - Arduino GRBL Screw Terminal Breakout Board is laid out for simple wiring to the stepper drivers. I'm going to be repowering my CNC mill using GRBL 1.1 and getting rid of Mach3 so I'll be ordering another of the ST25 - Arduino GRBL Screw Terminal Breakout Boards for that project. Because of the very good quality of the ST25 - Arduino GRBL Screw Terminal Breakout Board I can highly recommend it to anyone who is going to use Arduino and GRBL to power their machines. I say thanks for a great product and I'll be ordering another soon.
Fast seller, to send the product. It board is off good quality. The documentation is good. But in the documentation pin A4 is not good documented, it has to be A5 this one is connected.
I wish that some of the connections were not fixed mapped, so I could connect some pins to other DB25 pins For example: Pin1 output spindle direction, but in some machines sometime used as PWM. Pin 10 = reset/Estop, but sometimes used as A limit. Pin 17 = PWM or output, but sometime used as A step The board has the connectors on it to do this. But then some connections must be cut, the same way as for D11 and D12 Thank You.
This is a very nice shield for moving the Arduino pins out to a 25pin female connector (aka printer port). The board has a solder mask on the two outer layers, and a silkscreen on the upper layer. It was nice to have the option of supporting a later version of GRBL with PWM operation thru a simple modification to the board. There appears to be a discrepancy between the GRBL documentation regarding the pinouts for the stepper motors (direction and step flipped?) when compared to a LeadShine MX4660 Drive with Breakout board. I had to buzz out the shield board to see how it was wired to resolve my confusion. It would have been nice to have the schematic for the board. Instructions were quite good, and well illustrated. The board has additional prototyping areas. I intend to use one section to pull out a hard reset (for the Arduino), emergency reset (A0), hold (A1), and resume (A2) commands via switches.
Communications were listed as OK, but it should have been N/A. This was a straight purchase with no additional queries.