If this happens very often, it might be time to change the probe which is also included in the kit. To fix this, turn off the printer and manually pull down and push in the probe and restart the printer. TIP: If at any point the BL Touch starts to flash red and the probe does not move, it means that the probe got stuck. The nozzle will move to 9 positions on the bed and measure the off-set values for each point, so that when you print a model, the printer takes into account the off-set values and prints higher or lower accordingly. Select the “Level” option on the main screen and wait for the auto leveling to be complete. TIP: If your nozzle has some remnant filament from your previous print, heat up the nozzle and clear it away before doing this step as the excess stuck filament will affect the resistance you feel under the paper.Īfter the Z-axis offset is correctly set, it is time to test the auto bed leveling. TIP: If you find that after you set a new Z-offset value, the motor does not move, change the Z-offset back to 0, auto-home again, move the Z-axis down as above and try again. We find that typically the offset is somewhere between -2.50 to -3.50. Note that the nozzle only moves after you set the value and press the button to confirm. Start with decrements of 1 followed by 0.1 and 0.05 until you feel some resistance against the paper under the nozzle. Negative values mean the nozzle moves downwards. Now, to set the Z-offset, select “Back > Z-offset” and start to decrease the Z-offset value. To prevent any accidental bed scratching, place a piece of paper at the bottom of the nozzle on the bed before moving the Z axis. To adjust for the Z-offset, we must first move the nozzle position to 0. With the BL-Touch the Auto home function does not bring the Z position to 0. You will realize that the printer now homes to the center of the bed instead of the bottom corner. From the main menu, select “Prepare > Auto home”. After installing the new firmware and the BL Touch /CR Touch on your printer, to use the auto-leveling capabilities we have to first determine the Z-offset requiredįirst, auto-home the printer.