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--- 04_projects:02_kinetic_sand_table [2025/01/20 16:30] – [Wiring] jattie
+++ 04_projects:02_kinetic_sand_table [2025/01/29 20:46] (current) – [GRBL Board Assembly and Setup] jattie
@@ Line 136: / Line 136: @@
 </WRAP>
-{{:04_projects:screenshot_2025-01-20_153750.png?direct&380|}}{{:04_projects:screenshot_2025-01-20_153824.png?direct&380|}}So some further research had some reasonably costed silent steppers and I opted for some TMC2208 drivers from Amazon and tested then out. I got two for around €9.00, and wired up a motor to a pico 2040 and proceeded to do some tests.
+=== Alternative Stepper Driver ===
+{{:04_projects:screenshot_2025-01-20_153750.png?direct&380|}}{{:04_projects:screenshot_2025-01-20_153824.png?direct&380|}}So some further research had some reasonably costed silent steppers and I opted for some TMC2208((https://wiki.fysetc.com/TMC2208/)) drivers from Amazon and tested then out. I got two for around €9.00, and wired up a motor to a pico 2040 and proceeded to do some tests.
 {{:04_projects:img_2003_1.jpeg?direct&400 |}}I followed this basic circuit diagram I found online, and the noise reduction was substantial. After some further research I was unable to find a good and cost effective solution to connect mi Pico 2040 to a driver board and explored [[https://member.pcbway.com/|pcbway]] that claimed to be low cost custom pcb provider, this proofed to be true and after one steep learning curve and countless hours later I have used the free version of Fusion 360 to create a double layer PC board.
@@ Line 154: / Line 156: @@
 The Amazon parts list is here: [[https://www.amazon.co.uk/hz/wishlist/ls/22N43I9CAZ9IW?ref_=wl_share|Amazon Parts List]]
+{{:04_projects:screenshot_2025-01-20_163154.png?direct|}}
+<WRAP center round tip 60%>
+It's working out around €16 per PCB for 5 PCB's and all the parts, then a minimum of €5 to land a Pico 2040 outside the UK, the costs are around €21, if you can buy a populated board for less, it's probably worth voiding the hassle of parts, soldering etc. So a populated programmed board will have to sell for €42 plus shipping costs.
+</WRAP>
+===== GRBL Board Assembly and Setup =====
+<WRAP center round important 60%>
+Before inserting the microcontroller and drivers into the board, fist set the step down regulator to 5.1V, failing to do so will fry the Pico board.
+</WRAP>
+The DIP switches on the board nex to the stepper is wired to VIO, so to set Micro-stepping simply turn them on or off using this table.
+^MS2(-)	^MS1(-)	^Steps(-)	^Interpolation(-)	^Mode(-)^
+|GND	|VIO	|1⁄2	|1⁄256	|stealthChop2|
+|VIO	|GND	|1⁄4	|1⁄256	|stealthChop2|
+|GND	|GND	|1⁄8	|1⁄256	|stealthChop2|
+|VIO	|VIO	|1⁄16	|1⁄256	|stealthChop2|
 ===== Linear Hardware =====