Updates

content/maker-things/_index.md

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 Click on a link in the list below to go to that page:
 
 1. [Electronics tips](../../maker-things/electronics-tips)
+1. [GRBL_ESP32 tips](../../maker-things/grbl-esp32-tips)
 1. [How to properly level your 3D printer](../../maker-things/how-to-properly-level-your-3d-printer)

content/maker-things/grbl-esp32-tips.md

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+title = "GRBL_ESP32 tips"
+weight = 2
+sort_by = "weight"
+insert_anchor_links = "right"
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+I made a CNC that uses [a custom board I designed](https://gitlab.com/stavros/esp32-cnc), and which runs [GRBL_ESP32](https://github.com/bdring/Grbl_Esp32/). I couldn't find the following info easily, so I've written it here:
+
+- You can specify the enable pin for the drivers with the `STEPPERS_DISABLE_PIN` option. This should be used like `#define STEPPERS_DISABLE_PIN GPIO_NUM_2`.
+- To invert the enable signal, you can use `#define DEFAULT_INVERT_ST_ENABLE 1`. My board needed the enable signal to *not* be inverted (that's what A4988/Trinamic TMC2208 drivers need), so I set it to 0.
+- To always keep the steppers enabled (locked) to avoid them moving, you can specify `$Stepper/IdleTime=255`. That's the maximum timeout and will always keep them enabled.
+
+* * *
+
+<p style="font-size:80%; font-style: italic">
+Last updated on February 15, 2021. For any questions/feedback,
+email me at <a href="mailto:hi@stavros.io">hi@stavros.io</a>.
+</p>

content/maker-things/how-to-properly-level-your-3d-printer.md

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 +++
 title = "How to properly level your 3D printer"
-weight = 2
+weight = 3
 sort_by = "weight"
 insert_anchor_links = "right"
 +++