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BLtouch heat comment

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lawgicau
2021-07-13 21:37:08 +10:00
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troubleshooting.html
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@ -353,7 +353,7 @@ z_probe: open</pre>
<p class="warning">According to the Marlin M119 documentation, a BLtouch is in an error state if it reports <b>TRIGGERED</b> 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 <a href="#pindebugging">Pins Debugging / Direct Pin Control tab</a> if the sequence above does not work for you.</p>
<h4>BLtouch physical mounting</h4>
<p>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.</p>
<p>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. 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:</p>
<p>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:</p>
<a href="#" data-featherlight="img/bltouchdimensions.jpg"><img class="thumb" src="img/bltouchdimensions.jpg" /></a>
<p>If your BLtouch is mounting too far off this target of 2.3 to 4.3mm, the probing results may be inaccurate. For a guide to measuring and inputing the probe X, Y and Z offsets, see this video guide:</p>
<iframe width="480" height="360" src="https://www.youtube.com/embed/fN_ndWvXGBQ" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>