150612 Arduino Motion Parts

WARNING: I've had a lot of heat, power, blown parts on these cheap stepper motor driver boards. Don't buy them!

Here's a little unboxing of some Arduino motion parts that arrived today.

http://www.aliexpress.com/item/Free-s...
http://www.aliexpress.com/item/Free-S...
http://www.aliexpress.com/item/Free-s...
http://www.ebay.com/itm/330984854070?...
http://www.thingiverse.com/thing:710913


BTW, these boards, while inexpensive (no they're cheap), don't work! Here's a response to Ruy below.

Ruy: Did the arduino nano cnc shield work, after all?

Craig: A video by someone else states that a few pins are switched, so you need to edit the GRBL source a bit in order to make it work.

   • 170125 Valve Studio - Faraday Coil Wi...  

Yes, it worked but I did have to modify the grbl v1.1 source before compiling. I found a document called "Keyestudio CNC shield v4.pdf", it states

modifications to grbl v1.1f, grbl/cpu_map.h

The firmware of this product is different from the one of official web, that is, they have different interfaces. So in config corresponding interfaces of our products is shown as below:
#define X_STEP_BIT 5 // Uno Digital Pin 5
#define Y_STEP_BIT 6 // Uno Digital Pin 6
#define Z_STEP_BIT 7 // Uno Digital Pin 7
#define X_DIRECTION_BIT 2 // Uno Digital Pin 2
#define Y_DIRECTION_BIT 3 // Uno Digital Pin 3
#define Z_DIRECTION_BIT 4 // Uno Digital Pin 4

corresponding interfaces of official web is shown as below:
#define X_STEP_BIT 2 // Uno Digital Pin 2
#define Y_STEP_BIT 3 // Uno Digital Pin 3
#define Z_STEP_BIT 4 // Uno Digital Pin 4
#define X_DIRECTION_BIT 5 // Uno Digital Pin 5
#define Y_DIRECTION_BIT 6 // Uno Digital Pin 6
#define Z_DIRECTION_BIT 7 // Uno Digital Pin 7

its kind of cryptic from the text but this shows what to change.