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Alarm : The AI will flash the LED indicator if a problem is detected during a self-test or operation. The 3D printer can read the BLTouch alarm signal, and according to the alarm status, it can stop and pause the 3D printer with preset G-code, as well as operate the BLTouch release, stow, etc. Please do not ignore the alarm signal and make good use of it. It can keep your 3D printer and BLTouch safe. Because the BTT SKR Mini E3 V3 serves as a drop-in replacement for Creality Ender 3 mainboards, the stepper motor wiring should be simply a case of inserting the correct cable into the corresponding connector. For example, the X-Axis stepper motor cable will plug into the XM connector on the SKR Mini E3 V3 mainboard. The main difference between BLTouch and other auto-leveling methods has to do with the kind of sensor used. Other sensor methods Once you found the firmware bundle binary that you’re looking for, you will want to drag it to an empty SD card that is under 8GB or less. Install the New Firmware on the Printer
When you approach the Z-Home position, it could be that the nozzle is somewhere way off. In this case, the Z offset is probably set incorrectly. You can adjust it via the menu.
Upgrading with an automatic printing bed leveling sensor is much easier with the Ender 3 V2 than with the original Ender 3. BLTouch is an automatic level sensor for 3D printers, with which the inclination of the bed surface can be measured precisely. It can work with all types of print bed surfaces such as glass, blue tape or other materials.
Sadly with so many stepper motors on the market and no set standard on their wiring, writing a guide becomes near impossible. Instead, use the diagram above to match the pairs (1A & 1B, 2A & 2B) of the stepper motors to the mainboard. If you require further assistance, I suggest reading our Stepper motor wiring guide, which details three easy ways of finding the paired/phased connections of a stepper motor. Limit Switches for Endstops When you have all the necessary materials together, you can start the installation. The installation is divided into two steps: mount the BLTouch itself to the print head and then connect the cable to the mainboard. Importantly, ensure the 5V pins are wired correctly by following the 5V pin on the SKR Mini E3 V3 (far-right) to the 5V pin on the TFT display.
Diagnostics and firmware
If you want the Ender 3 V2 to automatically level the print bed each time you start a new print, you can set this in Cura.
The updated printer firmware will allow you to set the Z offset, which controls the position that the printer considers to be “0” directly above the print bed. Follow these steps to calibrate the offset: BLTouch is an auto leveling sensor for 3D Printers that can precisely measure the tilt of Bed surface. It could work with any kinds of bed materials, such as glasses, woods, metals, and so on. It takes about 2-3 minutes and will return to the center when it’s complete. 14 – Update your slicer settings I have to say that I tried quite a few inductive and capacitive sensors, I even opted for the original PINDA 2 , which is very comfortable to install since is one of the few that actually powers 5V and gives quite a bit of precision. But it didn’t convince me either. In each and every one of them a common denominator, the detection distance varies depending on the metal and even the temperature of the bed. Once you update your firmware, you should see the BLTouch light-up red after turning the printer on. If it is, then it’s working thus far! Congrats! 11 – Change Z-axis location
Further reading
Main functions and controls of BLTouch are the same as usual auto bed leveling sensor, consists of RC servo and micro switch . Thus, BLTouch can be applied on almost every board. Now that the correct firmware is installed, you have set the Z-Offset and everything is mounted correctly, you can start the automatic print bed leveling. With the new firmware, you will find a new “Leveling” button in the menu. When auto bed leveling is the topic, BLTouch is the name that comes to mind as the most popular probe on the market right now, also creating the most popular printer and probe combination together with the Ender 3 that it supports. Even though paying attention to these two factors for configuring the start G-code will ensure that your BLTouch will run and automatically level the bed before each print, the code won’t be fully optimized, which we will cover next. How to Optimize the BLTouch Start G-Code? Once again, if you are using a BTT UPS 24V Power Out Module. Then take a look at our guide to setting up the BTT UPS 24V. LCD Installation
BLTouch / 3DTouch sensors are mechanical, so they are not affected by heat, humidity or the type of material on your printing surface. You can either remove the wire from the mainboard when you open it up later on, or you can simply zip-tie the wire behind the frame. Now, you’ll need to update the G-code settings of whatever slicing program you use, such as Cura or Simplify3D. We use Cura as our slicer, so we’ll show you how to update the settings there. But whichever slicer program you’re using, you’ll need to add just one line right below G28: G29 ; Auto bed-level (BL-Touch) Changing Cura settingsHowever, you may run into trouble when using a 3rd-party firmware for the BLTouch, such as the Smith3D firmware for the Ender 3 V2, which doesn’t natively support Octoprint. In those cases, you’ll need to customize the Marlin code in the firmware to run with Octoprint. BLTouch plugin for Octoprint BL Touch is a type of semiconductor hall sensor and is an electronic component for 3D Printers . A precisely measures the tilt of the bed surface. It could work with any kind of bed material, such as glasses, wood, metals, and so on. Furthermore, when there is a mains power cut, a small UPS device such as the BTT UPS 24V will notify the mainboard of a power outage. The printer will then prepare accordingly.
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