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    New IR z probe issues

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    IR Height Sensor
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    • Phaedruxundefined
      Phaedrux Moderator @agent0810
      last edited by

      @agent0810 said in New IR z probe issues:

      so when i do home all it goes up to the nozzle then back down a bit, then i do the G30 S-1 and it goes up to almost where i need it to be

      Sorry this doesn't make any sense to me.

      Are you following the instructions on jogging the nozzle to touch the bed, sending G92 Z0, raising the nozzle a bit and then sending G30 S-1? That should give you a trigger height. You then put that trigger height value into the G31 Z. Then after rebooting and homing you should be able to have Z0 just touch the bed.

      Z-Bot CoreXY Build | Thingiverse Profile

      agent0810undefined 1 Reply Last reply Reply Quote 0
      • agent0810undefined
        agent0810 @Phaedrux
        last edited by agent0810

        @Phaedrux

        Doing everything you say there, except instead of raising the nozzle i am lowering the bed. that is what has me confused, from everything im doing i feel like i should be getting the results i want.\

        and to be clear, what i put in G31 Z is the output on the console right?

        thanks again

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        • agent0810undefined
          agent0810
          last edited by

          and to be clear, what i put in G31 Z is the output on the console right? so i would put in 1.501 for this?

          7/21/2020, 10:55:50 PM G30 S-1
          Stopped at height 1.501 mm

          droftartsundefined 1 Reply Last reply Reply Quote 0
          • droftartsundefined
            droftarts administrators @agent0810
            last edited by

            @agent0810 said in New IR z probe issues:

            and to be clear, what i put in G31 Z is the output on the console right? so i would put in 1.501 for this?

            7/21/2020, 10:55:50 PM G30 S-1
            Stopped at height 1.501 mm

            Yes, that's correct. You can send G31 Z1.501 in the console, then send G31 to check it is set, eg my G31 response is:

            G31
            Z probe 0: current reading 0, threshold 500, trigger height 1.250, offsets X20.0 Y0.0
            

            Test that the probe is functioning correctly by homing Z, then move Z to 0 and check the nozzle is just touching the bed. Then modify your G31 line in config.g, so that the new setting persists after a reset. Change G31 line in config.g to:

             G31 P500 X0 Y0 Z1.501 ; set Z probe trigger value, offset and trigger height
            

            Ian

            Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

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            • agent0810undefined
              agent0810 @droftarts
              last edited by

              @droftarts thank you!

              did as you asked and it is still a little to high, its not pushing the filament onto the glass bed.

              droftartsundefined 1 Reply Last reply Reply Quote 0
              • agent0810undefined
                agent0810 @droftarts
                last edited by

                @droftarts

                i have it zeroed in the middle of the bed. this is what i see on my web interface, that normal?

                a507065b-6f9b-4416-a7d4-7e2aee8e3164-image.png

                droftartsundefined 1 Reply Last reply Reply Quote 0
                • droftartsundefined
                  droftarts administrators @agent0810
                  last edited by

                  @agent0810 Adjust with 'Z babystepping' (on the Status tab of DWC), until you're happy with how the first layer is going down. Presumably you'll need raise the bed a little, so this may be -0.1mm of babystepping, so you can reduce the G31 Z height by 0.1mm. If you do this, don't forget to reset babystepping (with M290 R0 S0) if you don't reset the printer.

                  Have you calibrated your extruder, though? If you haven't, it may be underextruding, which will also make it look like the nozzle is too far off the bed. So get that right, too.

                  Ian

                  Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

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                  • droftartsundefined
                    droftarts administrators @agent0810
                    last edited by

                    @agent0810 said in New IR z probe issues:

                    i have it zeroed in the middle of the bed. this is what i see on my web interface, that normal?

                    What do you mean, zeroed? If you want X0 Y0 to be in the middle of the bed, you need to adjust M208. At the moment yours is set to:

                    ; Axis Limits
                    M208 X0 Y0 Z0 S1 ; set axis minima
                    M208 X225 Y225 Z300 S0 ; set axis maxima
                    

                    So it's not surprising that, with the nozzle in the middle of the bed, X and Y are 120. To get X0 Y0 to be in the middle, you'll want something like:

                    ; Axis Limits
                    M208 X-120 Y-120 Z0 S1 ; set axis minima
                    M208 X120 Y120 Z300 S0 ; set axis maxima
                    

                    See https://duet3d.dozuki.com/Wiki/Centering_the_bed_or_setting_the_bed_origin

                    Ian

                    Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

                    agent0810undefined 2 Replies Last reply Reply Quote 0
                    • agent0810undefined
                      agent0810 @droftarts
                      last edited by

                      @droftarts

                      started printing and had to z babyset +.05 to 1mm to get it where i need it.
                      Current Offset: 1.00 mm

                      what do i need to do to keep it here?

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                      • agent0810undefined
                        agent0810 @droftarts
                        last edited by

                        @droftarts
                        print came out amazing, just need to have it default to the 1mm babystep.

                        44E38A03-CEC9-4B63-89D6-7C2943C24C33.jpg

                        fcwiltundefined 1 Reply Last reply Reply Quote 0
                        • fcwiltundefined
                          fcwilt @agent0810
                          last edited by fcwilt

                          @agent0810 said in New IR z probe issues:

                          @droftarts
                          print came out amazing, just need to have it default to the 1mm babystep.

                          While you can change the baby step setting in code you can also adjust the the trigger height setting of your Z probe to achieve the same thing - which is what I do.

                          If you used baby stepping to move the nozzle closer to the bed increase the trigger height setting by that amount.

                          If you used baby stepping to move the nozzle away to the bed decrease the trigger height setting by that amount.

                          Frederick

                          Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

                          agent0810undefined 1 Reply Last reply Reply Quote 0
                          • agent0810undefined
                            agent0810 @fcwilt
                            last edited by

                            @fcwilt
                            so if im currently at
                            G31 P500 X50 Y0 Z1.501

                            and my current offset was 1 mm that i had to move the nozzle away from the bed. i need to decrease the Z from 1.501 to .501?

                            so

                            G31 P500 X50 Y0 Z.501?
                            i am fairly positive that i have tried that and it didnt work 😞

                            fcwiltundefined 1 Reply Last reply Reply Quote 0
                            • Phaedruxundefined
                              Phaedrux Moderator
                              last edited by

                              A larger G31 value results in the nozzle being closer to the bed.

                              Z-Bot CoreXY Build | Thingiverse Profile

                              Phaedruxundefined 1 Reply Last reply Reply Quote 0
                              • fcwiltundefined
                                fcwilt @agent0810
                                last edited by fcwilt

                                @agent0810 said in New IR z probe issues:

                                @fcwilt
                                so if im currently at
                                G31 P500 X50 Y0 Z1.501

                                and my current offset was 1 mm that i had to move the nozzle away from the bed. i need to decrease the Z from 1.501 to .501?

                                so

                                G31 P500 X50 Y0 Z.501?
                                i am fairly positive that i have tried that and it didnt work 😞

                                If you use baby stepping to move AWAY from the bed then the trigger height setting must be decreased.

                                If you're numbers are correct then that value is correct.

                                You can always determine the trigger height setting through trial and error, adjusting it up or down with G31, setting the Z=0 datum with G30 and repeating the process until moving to Z=0 has the nozzle just touching the bed.

                                Frederick

                                Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

                                agent0810undefined 2 Replies Last reply Reply Quote 0
                                • agent0810undefined
                                  agent0810 @fcwilt
                                  last edited by

                                  @fcwilt
                                  what is the P value in this line?

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                                  • Phaedruxundefined
                                    Phaedrux Moderator
                                    last edited by

                                    trigger sensitivity.

                                    Z-Bot CoreXY Build | Thingiverse Profile

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                                    • agent0810undefined
                                      agent0810 @fcwilt
                                      last edited by

                                      @fcwilt

                                      i am not sure what i am doing wrong. i set it to the .501 and its still to far from the bed, filament isnt sticking. im not sure where to go from here. since it was to far away i lowered it to 0 and its still to far away.

                                      droftartsundefined jumpedwithbothfeetundefined 2 Replies Last reply Reply Quote 0
                                      • Phaedruxundefined
                                        Phaedrux Moderator @Phaedrux
                                        last edited by

                                        @Phaedrux said in New IR z probe issues:

                                        A larger G31 value results in the nozzle being closer to the bed.

                                        If it's still too far away you're going in the wrong direction. Instead of 0.5 you would need to add to the value, so 2.5.

                                        Z-Bot CoreXY Build | Thingiverse Profile

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                                        • droftartsundefined
                                          droftarts administrators @agent0810
                                          last edited by

                                          @agent0810 Think of it this way; when the probe triggers, it sets the Z height to the Z offset. So when it triggers, it sets Z to 1.5mm. If you then move the bed up to Z0, the nozzle should be touching the bed. If it's still away from the bed, the Z offset needs to increase. From your numbers, it should probably be around Z2.5.
                                          There is also a guide to do this: https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe#Section_Calibrate_the_Z_probe_trigger_height

                                          It may make a difference where you probe the bed. If you're homing over in the corner (and make sure the probe is homing over the bed if you do), then moving to the centre to print, it could be if your bed is not level, and the corner is lower or higher than the centre. You can check this manually (move the nozzle around to the corners of the bed, manually adjust bed level), or by getting mesh compensation going (https://duet3d.dozuki.com/Wiki/Using_mesh_bed_compensation) and looking at the mesh it creates. You can also do three point levelling manually, if you have bed adjusters; see https://duet3d.dozuki.com/Wiki/Using_the_manual_bed_levelling_assistant

                                          Ian

                                          Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

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                                          • jumpedwithbothfeetundefined
                                            jumpedwithbothfeet @agent0810
                                            last edited by jumpedwithbothfeet

                                            @agent0810 I have an ender 5 and i have had exactly the same issue, its enough to drive you mad! but any way it seems if you follow this process exactly it helped me sort it out.

                                            Important do NOT home the Axis's until the list tells you too!

                                            1. Turnoff printer!
                                            2. Turn on and go straight to config.g and change G31 Z to 0
                                            3. save and reset board
                                            4. heat bed to what ever temp you normally use and wait for it reach it (this is important on the ender 5 as the bed support is poor)
                                            5. Heat nozzle to your most used temp and wait!
                                            6. once both are heated now home all axis's ( i use the middle of the bed)
                                            7. Jog Z to zero ( the nozzle should be well off the bed)
                                            8. type M564 S0 into the console this will disable the axis limits
                                            9. jog nozzle down until it touches the bed or paper which ever you prefer
                                            10. type G92 Z0 into the console this resets the Z axis height
                                            11. turn nozzle heater off (can affect the BLtouch touch sensor reading not sure regarding IR sensor)
                                            12. now type G1 Z5 followed by G30 S-1 to do a single bed probe i made a macro to do this it helps!
                                            13. probe the bed at least 5 or more times and go to the console and take the average trigger height.
                                            14. save the trigger height in config.g G31 Z then the reset board and print! well after G29 that is 🙂

                                            i'm sure you have carried out all these steps but it seems its the sequence that works, hope this helps!

                                            Regards Jim

                                            6HC Voron Trident based, 6XD CNC, Mini 5 polar printer

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