SM3_V3.0.1_20260326.zip (298 KB)
After waiting (long enough…) for Snapmaker to release the CNC probe that was hinted at in promotional materials—but never actually delivered—I decided to build my own solution.
I used the Artisan Booster Fan hardware and simply plugged a light into the light port. Here’s how it behaves:
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Flashing: waiting for connection to the controller
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Slow breathing (dim up/down): connected and ready
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Full intensity ON: probe contact is detected
For the probing signal, I used pins 3 (Input) and 4 (gnd) from the door sensor connector.
Everything runs after reflash the enclosure board using a reflashed calibrator BIN.
Important notes:
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The calibrator MUST be connected before powering on the Artisan controller
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If disconnected, a reboot is required
Controller update required:
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This only works on Artisan
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Make sure your controller is on official Snapmaker firmware 2.8.0
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Copy SM3_V3.0.1.bin to a USB key and perform a local update from the controller
At ~80%, you’ll get an error:
“no screen update file” → this is NORMAL
I am only updating the controller (Marlin), not the Android screen.. just close it..
Note:
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The calibrator is intended for CNC use
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It remains active with other modules, but their native functions still work fine, so no real benefit there
Workflow (my use case):
I machine plastic enclosures using CAM-generated G-code and multiple aluminum jigs with a bottom-left origin.
Setup:
Result:
I’ve included the G-code I personally use if anyone wants to try it.
Disclaimer:
This is an unofficial modification. I am not affiliated with or supported by Snapmaker.
Any attempt to replicate this is entirely at your own risk.
PS:
The new firmware also enables support for the Snapmaker 2.0 emergency stop button. I know some will say it’s unnecessary since there is already an emergency stop on the unit—but in my setup, the built-in button is not easily reachable due to my workspace layout. A remote E-stop is genuinely useful.
Some purists will argue that a remote E-stop is not as good as a physical one on the machine. However, the stock unit is not a true hardwired full E-stop either—it remains software-controlled. Cutting the power supply with a remote achieves essentially the same result, with about an 8 ms delay due to CAN bus latency.
In my case, that delay is far shorter than my reaction time to reach the original button, which is not optimally positioned. My remote button is placed right next to my actual working area, making it more practical and safer in real use.
No modification is required to the emergency stop button—it is plug-and-play just like on the SM2, as long as you are running controller update 3.0.1.
If Snapmaker won’t ship it… build it.
