Calibrating Z-Offset With A BLTouch Bed Levelling Probe

hello makers welcome 3d maker noob I'm Joe and today I'm going to show you how to calibrate the Z offset when you have an auto bed leveling probe stick around [Music] welcome back makers so today I want to tackle something that sort of a pain for a lot of people and that is calibrating the Z offset when you have a bed leveling probe now my case I'm gonna do this procedure on the BL touch which I have installed on my custom printer however keep in mind that this approach should work for any sensor for auto bed leveling so without further ado I'm gonna go on to the PC and show you guys how so the first thing you're going to do is connect your printer to printer face attach the USB cable choose the right port baud rate and connect as soon as you get here what you will do is click on home so you can home the 3d printer next we'll need to remove any current settings that the EEPROM has or the printer has which relate to the Z offset in this case it's this one right here as you can see it's Z minus 12 point 40 so we will need to type in m8 v 1 Z 0 so this will reset the Z offset to 0 next up we will type in M 500 because we want these settings to be stored in EEPROM we will then type in M 501 so we can grab these settings from the EEPROM and set them as active parameters finally just to make sure we can type in M 5 0 3 which will read all the settings of the current printer and as you can see at the bottom here the Z offset is set to 0 next we want to hung the the z-axis so we can type in G 28 and Z when you do the homing of the z-axis as you notice once the BL touch or any inductive sensor is triggered the nozzle moves slightly upwards so what we need to make sure of is to move the nozzle to the proper true z0 offset to do so we will type in g1 which is the move command we're going to type in F 60 which is the speed and we're going to type in Z zero so it gives it the instruction to move to zero offset on the z now as you can see here currently that is the true zero Z offset that the printer is set up for however we cannot move the printer any further down no matter how many times we press the Z - because the firmware has a soft limit switch on which prevents it from going further down than zero so we currently need to switch that off and we do so by typing in M - 1 1 s 0 as you can see here it says that soft and stop is off so what we will do now is slide a piece of paper under the nozzle and we will slowly move the nozzle downwards until the paper can barely move due to the friction of the nozzle and the bed once we have found the right Z offset thanks to the paper we're going to look at the screen and we're going to take note of the Z offset which currently is Z minus 2 point 4 9 so we're going to type that down minus 2 point 4 9 and now we're almost at the Z offset we have to keep in mind that we use the paper which is around 0.1 millimeter thick so we have to take that in consideration so what we're going to do is we're going to add the thickness of the paper or any other measuring device you used and add it to that one now that we know our true zero offset which is minus 2 point 5 we're going to go to the command line we will type in n 8 5 1 which is the command for the Z offset and we're going to type in Z - 2 point 5 0 as you can see it has been registered next we will need to switch back on these soft end stops and we will do so by typing M - 1 1 which is the command that we did before however we'll type s 1 to enable it as you can see now the end stop is back on and once again we need to save this information to apron by typing in M 500 from EEPROM we need to send it back to active parameters so we type M 5 0 1 and just to confirm thing is fine we type em 5:03 to read the current settings and finally as you can see done here ma 5 1 is 0 minus 2.5 now to verify all this all you need to do is once again click on home all and if you type in G 1 F 60 Z 0 it should take the nozzle back down to the true zero offset which should be almost touching the build plate which as you can see is absolutely perfect and you're done you can then disconnect the printer and start your print and that ladies and gentlemen should solve all your Z offset problems it's not that complicated I will list down the steps one by y in the video descriptions just for easier reference but it only takes a few steps maybe 5 10 minutes and you're done so I hope this video was helpful to you guys I know a lot of you have asked me for this so I apologize it's been a long time coming if you have any further questions please leave them in the comment section below I'll be more than happy to reply to them as always please like comment share subscribe and as always happy making guys you [Music]

Channel: 3D Maker Noob

Views: 624,466

Keywords: bltouch, anet, anet a8, anet a6, gearbest, banggood, aliexpress, prusa i3, prusa i3 clone, z ofset, z-offset, calibrate bltouch, auto bed levelling, auto levelling, 3d printer, 3d printing, tutorial, guide, inductive sensor, pinda probe, how to set up bltouch, setting up bltouch with marlin, easy bltcouh prode setup

Id: y_1Kg45APko

Length: 6min 46sec (406 seconds)

Published: Tue Oct 31 2017