From 2890069591d741406df3b62197b6ec19b35f5d7e Mon Sep 17 00:00:00 2001 From: teachingtechYT Date: Tue, 27 Jul 2021 08:52:56 +1000 Subject: [PATCH] Typo --- troubleshooting.html | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/troubleshooting.html b/troubleshooting.html index 339dfac..496dfee 100644 --- a/troubleshooting.html +++ b/troubleshooting.html @@ -350,7 +350,7 @@ z_probe: open

If we now manually stow the probe pin with M280 P0 S160, and again send M119, it should return:

z_probe: TRIGGERED

If the trigger status does not change, the first thing to try is to reverse the black and white wires into the mainboard. Also note that is possible to connect the black and white wires to the Z min endstop port or a another port of your choosing, but this must be configured in the firmware. You'll notice in the wiring diagram above, the port for the black and white wires is shown and the matching line in the firmware is referenced to suit.

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According to the Marlin M119 documentation, a BLtouch is in an error state if it reports TRIGGERED to the terminal. Howwver my BLtouch installation works as described above and has been working perfectly for years now without error, so perhaps this varies from mainboard to mainboard. An additional BLtouch testing method is shown on the Pins Debugging / Direct Pin Control tab if the sequence above does not work for you.

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According to the Marlin M119 documentation, a BLtouch is in an error state if it reports TRIGGERED to the terminal. However my BLtouch installation works as described above and has been working perfectly for years now without error, so perhaps this varies from mainboard to mainboard. An additional BLtouch testing method is shown on the Pins Debugging / Direct Pin Control tab if the sequence above does not work for you.

BLtouch physical mounting

It should go without saying that everything should be rigidly mounted. BLtouch kits come with small springs but I have never used them without issue. Check for any loose fasteners in the print head and probe mounting assembly as a first step. If there is play and the BLtouch can pivot or slide from probing point to probing point, accuracy will really suffer.

Ideally the BLtouch (or any other ABL probe) will be mounted as closely to the nozzle as possible, but not so close it fails from exposure to heat. A silicone sock over the heater block can assist here. What people often forget is that the tip of the retracted probe needs to be a certain distance from the tip of he nozzle, as illustrated in the Antclabs diagram: