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    Only probe where the part will be printed

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    • OwenDundefined
      OwenD
      last edited by OwenD

      Here's how I do it.
      I'm sure there's may other ways.
      EDIT: I added my heating calls in superslicer because I realised I turn the heaters off in the probing, so you must heat after.

      In config.g I call this macro to set my initial probe points
      I also do this any other time I want to reset them to the full bed size.
      M98 P"0:/sys/setDefaultProbePoints.g" ; define default mesh grid

      ;0:/sys/setDefaultProbePoints.g
      var SafeZone = 10
      var MinReachableX = (sensors.probes[0].offsets[0] + var.SafeZone)
      var MaxReachabeX = (move.axes[0].max - sensors.probes[0].offsets[0] - var.SafeZone)
      var MinReachableY =  (sensors.probes[0].offsets[1] + var.SafeZone)
      var MaxReachabeY = (move.axes[1].max - sensors.probes[0].offsets[1] - var.SafeZone)
      
      M557 X{var.MinReachableX,var.MaxReachabeX} Y{var.MinReachableY,var.MaxReachabeY} S30; define mesh grid
      
      if !exists(global.minProbeX)
      	global minProbeX = move.compensation.probeGrid.mins[0]
      else
      	set global.minProbeX = move.compensation.probeGrid.mins[0]
      
      if !exists(global.minProbeY)
      	global minProbeY = move.compensation.probeGrid.mins[1]
      else
      	set global.minProbeY = move.compensation.probeGrid.mins[1]
      
      if !exists(global.maxProbeX)
      	global maxProbeX = move.compensation.probeGrid.maxs[0]
      else
      	set global.maxProbeX = move.compensation.probeGrid.maxs[0]
      
      if !exists(global.maxProbeY)
      	global maxProbeY = move.compensation.probeGrid.maxs[1]
      else
      	set global.maxProbeX = move.compensation.probeGrid.maxs[1]
      
      

      In Prusa/Superslicer I have

      set global.minProbeX = {first_layer_print_min[0]}
      set global.maxProbeX = {first_layer_print_max[0]}
      set global.minProbeY = {first_layer_print_min[1]}
      set global.maxProbeY = {first_layer_print_max[1]}
      T[current_extruder] ; select tool 
      M568 P[current_extruder] R{"{heat.coldExtrudeTemperature+5}"} S[first_layer_temperature_0] A1 ; (set extruder to stanby to soften any protruding filament before probing )
      M106 P[current_extruder] S0 ;Start with fan off
      M118 S"Heating Bed"
      G4 S1
      M140 S[first_layer_bed_temperature_0]  R{bed_temperature[0]-20}; Set fast bed temp & standby - Standby is 20 degrees less than normal.
      M116 ; Wait for bed before doing mesh probe.
      G29 ; do mesh for printed area
      G29 S1  ; load small mesh
      M568 P[current_extruder] R{"{heat.coldExtrudeTemperature+5}"} S[first_layer_temperature_0] A2 ; (set standby and active temperatures for active tool.  Standby is 5 degrees above cold extrude temp )
      M116 ; wait for temps
      

      In mesh.g I have

      ;0:/sys/mesh.g
      ; run when G29 with no paramters is called.
      ; if this file not found G29 S0 will run
      var m557MinX = 40;  ; put your default here
      var m557MaxX = 180;  ; put your default here
      var m557MinY = 20;  ; put your default here
      var m557MaxY = 180;  ; put your default here
      var MinSpace = 10 ; put default minimum spacing
      var MaxSpace = 30 ; put default maximum spacing
      var ProbeNumX = 8 ; put default probe points
      var ProbeNumY = 8 ; put default probe points.
      var ProbeCenterX = 90 ; will be updated to probe centre of print
      var ProbeCenterY = 90 ; will be updated to probe centre of print
      
      var MaxProbePoints = max(floor(move.axes[0].max / var.MaxSpace),floor(move.axes[1].max / var.MaxSpace)) ; maximum points in either axis
      
      echo "Maximum allowed probe points is " ^ var.MaxProbePoints ^ " using max space of " ^ var.MaxSpace
      var SafeZone = 3 ; safety margin for probing near edge.
      
      if exists(global.minProbeX)
      	if global.minProbeX < (sensors.probes[0].offsets[0] + var.SafeZone)
      		echo "minProbeX (" ^ global.minProbeX ^ ") unreachable - reset to " ^ (sensors.probes[0].offsets[0] + var.SafeZone)
      		set global.minProbeX = (sensors.probes[0].offsets[0] + var.SafeZone)
      	set var.m557MinX = global.minProbeX
      
      if exists(global.maxProbeX)
      	if global.maxProbeX < (global.minProbeX + (var.MinSpace*2))
      		set global.maxProbeX = (global.minProbeX + (var.MinSpace*2))
      	if global.maxProbeX > (move.axes[0].max - sensors.probes[0].offsets[0] - var.SafeZone)
      		echo "maxProbeX (" ^ global.maxProbeX ^ ") unreachable - reset to " ^ (move.axes[0].max - sensors.probes[0].offsets[0] - var.SafeZone)
      		set global.maxProbeX = (move.axes[0].max - sensors.probes[0].offsets[0] - var.SafeZone)
      	set var.m557MaxX = global.maxProbeX
      
      if exists(global.minProbeY)
      	if global.minProbeY < (sensors.probes[0].offsets[1] + var.SafeZone)
      		echo "minProbeY (" ^ global.minProbeY ^ ") unreachable - reset to " ^ (sensors.probes[0].offsets[1] + var.SafeZone)
      		set global.minProbeY = (sensors.probes[0].offsets[1] + var.SafeZone)
      	set var.m557MinY = global.minProbeY
      
      
      if exists(global.maxProbeY)
      	if global.maxProbeY < (global.minProbeY + (var.MinSpace*2))
      		set global.maxProbeY = (global.minProbeY + (var.MinSpace*2))
      	if global.maxProbeY > (move.axes[1].max - sensors.probes[0].offsets[1] - var.SafeZone)
      		echo "maxProbeY (" ^ global.maxProbeY ^ ") unreachable - reset to " ^ (move.axes[1].max - sensors.probes[0].offsets[1] - var.SafeZone)
      		set global.maxProbeY = (move.axes[1].max - sensors.probes[0].offsets[1] - var.SafeZone)
      	set var.m557MaxY = global.maxProbeY
      
      echo "Probing grid - X" ^ var.m557MinX ^ ":" ^ var.m557MaxX ^ " Y" ^ var.m557MinY ^ ":" ^ var.m557MaxY
      
      var MinProbesX = floor((var.m557MaxX - var.m557MinX) / var.MaxSpace)
      ;echo "Min Probes X is " ^ var.MinProbesX
      
      var MaxProbesX = floor((var.m557MaxX - var.m557MinX) / var.MinSpace)
      ;echo "Max Probes X is " ^ var.MaxProbesX
      
      set var.ProbeNumX = min(var.MaxProbePoints,var.MaxProbesX)
      
      var MinProbesY = floor((var.m557MaxY - var.m557MinY) / var.MaxSpace)
      ;echo "Min Probes Y is " ^ var.MinProbesY
      
      var MaxProbesY = floor((var.m557MaxY - var.m557MinY) / var.MinSpace)
      ;echo "Max Probes Y is " ^ var.MaxProbesY
      
      set var.ProbeNumY = min(var.MaxProbePoints,var.MaxProbesY)
      
      ; sanity check probe points
      if var.ProbeNumX<2
      	set var.ProbeNumX=2
      if var.ProbeNumY<2
      	set var.ProbeNumY=2
      
      if var.ProbeNumX > var.MaxProbePoints
      	set var.ProbeNumX = var.MaxProbePoints
      
      if var.ProbeNumY > var.MaxProbePoints
      	set var.ProbeNumY = var.MaxProbePoints
      
      if (var.ProbeNumX * var.ProbeNumY) > 441
      	if var.ProbeNumX > 21
      		set var.ProbeNumX = 21
      		echo "Too many X points - reduced to 21"
      	if var.ProbeNumY > 21
      		set var.ProbeNumY = 21
      		echo "Too many Y points - reduced to 21"
      	
      echo "Probing " ^ var.ProbeNumX ^ " points in X direction & " ^ var.ProbeNumY ^ " points in Y direction"
      
      ;check state of heaters
      var bedState = heat.heaters[0].state
      var bedActiveTemp = heat.heaters[0].active
      var bedStandbyTemp = heat.heaters[0].standby
      var nozzleState = heat.heaters[1].state
      M140 P0 S-276 ; turn off bed heater
      M568 P0 A0 ; turn off nozzle heater
      
      ; do probing
      set var.ProbeCenterX = (global.maxProbeX - ((global.maxProbeX - global.minProbeX)/2)) ; calculate centre point of probe area
      set var.ProbeCenterY = (global.maxProbeY - ((global.maxProbeY - global.minProbeY)/2)) ; calculate centre point of probe area
      echo "Setting Z datum point at X" ^ var.ProbeCenterX ^ " Y" ^ var.ProbeCenterY
      ; set Z = 0 to centre of probe area
      G1 X{var.ProbeCenterX- sensors.probes[0].offsets[0]} Y{var.ProbeCenterY- sensors.probes[0].offsets[1]} Z{sensors.probes[0].diveHeight+2} F3600
      G30
      echo "Mesh probing"
      M557 X{var.m557MinX,var.m557MaxX} Y{var.m557MinY,var.m557MaxY} P{var.ProbeNumX,var.ProbeNumY}
      if result != 0
      	abort "ERROR: could not create mesh" 
      else
      	G29 S0
      	if result != 0
      		abort "ERROR: Mesh probing failed"
      	else
      		echo "Mesh probing successful.   Loading mesh.."
      
      ; set Z = 0 to centre of probe area
      echo "Reset Z datum in mesh centre"
      G1 X{var.ProbeCenterX- sensors.probes[0].offsets[0]} Y{var.ProbeCenterY- sensors.probes[0].offsets[1]} Z{sensors.probes[0].diveHeight+2} F3600
      G30
      
      ; turn the heaters back on if needed
      if var.bedState != "off"
      	M140 S{var.bedActiveTemp} R{var.bedStandbyTemp}
      	if var.bedState="active"
      		M144 P0 S1 ; put bed on active temp
      	else
      		M144 P0 S0 ; put bed on standby temp
      if var.nozzleState	!= "off"
      	if var.nozzleState = "active"
      		M568 P0 A2 ; set nozzle to active
      	else
      		M568 P0 A1 ; set nozzle to standby
      
      RatRig0331undefined dc42undefined 3 Replies Last reply Reply Quote 2
      • RatRig0331undefined
        RatRig0331 @OwenD
        last edited by

        @owend how do you call that macro in your main config.g, and where in prusa slicer do you add the other macro?

        1 Reply Last reply Reply Quote 0
        • RatRig0331undefined
          RatRig0331 @OwenD
          last edited by

          @owend I think I figured it out but I’m getting a error massage: unknown variable ‘global.minprobex’

          OwenDundefined 1 Reply Last reply Reply Quote 0
          • OwenDundefined
            OwenD @RatRig0331
            last edited by

            @ratrig0331
            You need to put this line in config.g in place of your normal M557

            M98 P"0:/sys/setDefaultProbePoints.g"

            Then set all your default probe settings in the areas at the start of the macro.

            In superslicer put all the code provided in your start gcode

            1 Reply Last reply Reply Quote 0
            • dc42undefined
              dc42 administrators @OwenD
              last edited by dc42

              @owend said in Only probe where the part will be printed:

              set global.minProbeX = {first_layer_print_min[0]} 
              set global.maxProbeX = {first_layer_print_max[0]} 
              set global.minProbeY = {first_layer_print_min[1]} 
              set global.maxProbeY = {first_layer_print_max[1]}
              T[current_extruder] ; select tool
              M568 P[current_extruder] R{"{heat.coldExtrudeTemperature+5}"} S[first_layer_temperature_0] A1 ; (set extruder to stanby to soften any protruding filament before probing )
              M106 P[current_extruder] S0 ;Start with fan off    
              

              You appear to be using a mixture of { } and [ ] to surround named values that you want PrusaSlicer to substitute for. Which is correct?

              Duet WiFi hardware designer and firmware engineer
              Please do not ask me for Duet support via PM or email, use the forum
              http://www.escher3d.com, https://miscsolutions.wordpress.com

              OwenDundefined 1 Reply Last reply Reply Quote 0
              • OwenDundefined
                OwenD @dc42
                last edited by OwenD

                @dc42
                The square brackets are legacy place holders, so should probably be replaced by curly brackets.
                I just tried changing them all to curly brackets.
                However in Superslicer at least, [first_layer_temperature_0] only seems to work with a square bracket.

                EDIT
                It seems things like [first_layer_temperature_0] have been replaced by {first_layer_temperature[0]}

                I've revised the start Gcode related to probing to this (there are of course other commands need in the start code)

                set global.minProbeX = {first_layer_print_min[0]}
                set global.maxProbeX = {first_layer_print_max[0]}
                set global.minProbeY = {first_layer_print_min[1]}
                set global.maxProbeY = {first_layer_print_max[1]}
                T{current_extruder} ; select tool 1
                M568 P{current_extruder} R{"{heat.coldExtrudeTemperature+5}"} S{first_layer_temperature[current_extruder]} A1 ; (set extruder to stanby to soften any protruding filament before probing )
                M106 P{current_extruder} S0 ;Start with fan off
                M140 S{first_layer_bed_temperature[current_extruder]}  R{bed_temperature[0]-20}; Set fast bed temp & standby - Standby is 20 degrees less than normal.
                M116 ; Wait for bed before doing mesh probe.
                M561 ; clear any bed transform
                G29 ; do mesh for printed area
                G29 S1  ; load small mesh
                G01 X0 Y{"{move.axes{1}.max}"} Z0.6  F1500 ; Move to back corner while heating
                M568 P{current_extruder} R{"{heat.coldExtrudeTemperature+5}"} S{first_layer_temperature[current_extruder]} A2 ; (set standby and active temperatures for active tool.  Standby is 5 degrees above cold extrude temp )
                M116 ; Wait for all temps to stabilise
                
                RatRig0331undefined 1 Reply Last reply Reply Quote 0
                • RatRig0331undefined
                  RatRig0331 @OwenD
                  last edited by

                  @owend when I restart I get this

                  Error: (sensors.probes[0].offsets[0] + var.SafeZone)array index out of bounds of setDefaultProbePoints.g

                  And if I try to start a print I get this

                  Error: unknown variable 'global.minProbeX'

                  dc42undefined OwenDundefined 2 Replies Last reply Reply Quote 0
                  • dc42undefined
                    dc42 administrators @RatRig0331
                    last edited by

                    @ratrig0331 have you opened the GCode file in a text editor, to see what the slicer has actually generated?

                    Duet WiFi hardware designer and firmware engineer
                    Please do not ask me for Duet support via PM or email, use the forum
                    http://www.escher3d.com, https://miscsolutions.wordpress.com

                    RatRig0331undefined 2 Replies Last reply Reply Quote 0
                    • RatRig0331undefined
                      RatRig0331 @dc42
                      last edited by

                      @dc42 not yet I’ll take a look

                      1 Reply Last reply Reply Quote 0
                      • RatRig0331undefined
                        RatRig0331 @dc42
                        last edited by

                        @dc42 it looks like its all there in the gcode

                        ; external perimeters extrusion width = 0.40mm
                        ; perimeters extrusion width = 0.40mm
                        ; infill extrusion width = 0.40mm
                        ; solid infill extrusion width = 0.40mm
                        ; top infill extrusion width = 0.40mm
                        ; first layer extrusion width = 0.45mm

                        M73 P0 R8
                        M107
                        M104 S205 ; set temperature
                        ;TYPE:Custom
                        set global.minProbeX = 183.982
                        set global.maxProbeX = 316.018
                        set global.minProbeY = 188.982
                        set global.maxProbeY = 311.018
                        T0 ; select tool 1
                        M568 P0 R{heat.coldExtrudeTemperature+5} S205 A1 ; (set extruder to stanby to soften any protruding filament before probing )
                        M106 P0 S0 ;Start with fan off
                        M140 S68 R45; Set fast bed temp & standby - Standby is 20 degrees less than normal.
                        M116 ; Wait for bed before doing mesh probe.
                        M561 ; clear any bed transform
                        G29 ; do mesh for printed area
                        G29 S1 ; load small mesh
                        G01 X0 Y{move.axes{1}.max} Z0.6 F1500 ; Move to back corner while heating
                        M568 P0 R{heat.coldExtrudeTemperature+5} S205 A2 ; (set standby and active temperatures for active tool. Standby is 5 degrees above cold extrude temp )
                        M116 ; Wait for all temps to stabilise
                        M109 S205 ; set temperature and wait for it to be reached
                        G21 ; set units to millimeters
                        G90 ; use absolute coordinates
                        M83 ; use relative distances for extrusion
                        ; Filament gcode
                        SET_GCODE_OFFSET Z=0
                        SET_PRESSURE_ADVANCE ADVANCE=0.05
                        M107
                        ;LAYER_CHANGE
                        ;Z:0.2
                        ;HEIGHT:0.2
                        ;BEFORE_LAYER_CHANGE
                        ;0.2
                        G92 E0
                        ;

                        this is what i changed in the mesh.g for my 500x500mm xycore

                        ;0:/sys/mesh.g
                        ; run when G29 with no paramters is called.
                        ; if this file not found G29 S0 will run
                        var m557MinX = 25; ; put your default here
                        var m557MaxX = 450; ; put your default here
                        var m557MinY = 25; ; put your default here
                        var m557MaxY = 450; ; put your default here
                        var MinSpace = 10 ; put default minimum spacing
                        var MaxSpace = 30 ; put default maximum spacing
                        var ProbeNumX = 8 ; put default probe points
                        var ProbeNumY = 8 ; put default probe points.
                        var ProbeCenterX = 285 ; will be updated to probe centre of print
                        var ProbeCenterY = 270 ; will be updated to probe centre of print

                        var MaxProbePoints = max(floor(move.axes[0].max / var.MaxSpace),floor(move.axes[1].max / var.MaxSpace)) ; maximum points in either axis

                        echo "Maximum allowed probe points is " ^ var.MaxProbePoints ^ " using max space of " ^ var.MaxSpace
                        var SafeZone = 3 ; safety margin for probing near edge.

                        1 Reply Last reply Reply Quote 0
                        • OwenDundefined
                          OwenD @RatRig0331
                          last edited by OwenD

                          @ratrig0331
                          Sounds like it's not finding a sensors.probe[0] when you run the initial setup from config.g
                          As that line is at the start of the macro, it never gets to the lines that set the global variables up.
                          Make sure your probe is configured before calling the macro.
                          Maybe post you config.g so we can see how your probe(s) are configured

                          RatRig0331undefined 3 Replies Last reply Reply Quote 0
                          • RatRig0331undefined
                            RatRig0331 @OwenD
                            last edited by

                            @owend

                            ​
                            ;;; BLTouch ;;;
                            M950 S0 C"io2.out" ; Create a servo pin on io2
                            M558 P9 C"io2.in" H5 F240 T10800 A5 ; set Z probe type to unmodulated and the dive height + speeds
                            G31 P25 X-29.00 Y-2.00 Z2.471

                            OwenDundefined 1 Reply Last reply Reply Quote 0
                            • RatRig0331undefined
                              RatRig0331 @OwenD
                              last edited by

                              @owend

                              ​

                              ;;; Endstops ;;;
                              M574 X1 S1 P"io1.in" ; configure active high endstops
                              M574 Y2 S1 P"io0.in" ; configure active high endstops
                              M574 Z1 S2

                              1 Reply Last reply Reply Quote 0
                              • OwenDundefined
                                OwenD @RatRig0331
                                last edited by

                                @ratrig0331
                                Make sure
                                M98 P"0:/sys/setDefaultProbePoints.g"
                                Comes after your G31 in your BlTouch section

                                RatRig0331undefined 3 Replies Last reply Reply Quote 0
                                • RatRig0331undefined
                                  RatRig0331 @OwenD
                                  last edited by

                                  @owend ok I’ll move it and give it a shot

                                  1 Reply Last reply Reply Quote 0
                                  • RatRig0331undefined
                                    RatRig0331 @OwenD
                                    last edited by

                                    @owend that did the trick but now i need to turn down the amount of probe points
                                    var MinSpace = 10 ; put default minimum spacing
                                    var MaxSpace = 30 ; put default maximum spacing
                                    var ProbeNumX = 8 ; put default probe points
                                    var ProbeNumY = 8 ; put default probe points.
                                    var ProbeCenterX = 285 ; will be updated to probe centre of print
                                    var ProbeCenterY = 270 ; will be updated to probe centre of print

                                    with my 100x100mm print its trying to do a 13x13 grid what do i tweak to lower that?

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                                    • RatRig0331undefined
                                      RatRig0331 @OwenD
                                      last edited by

                                      @owend ok after letting it 100% there were more errors

                                      8/14/2022, 10:15:03 PM Error: M557: bad grid definition: Spacing too small
                                      8/14/2022, 10:14:19 PM Error: in GCode file line 773: G1: expected '}'

                                      line 773 is your
                                      G01 X0 Y{move.axes{1}.max} Z0.6 F1500 ; Move to back corner while heating

                                      OwenDundefined 1 Reply Last reply Reply Quote 0
                                      • OwenDundefined
                                        OwenD @RatRig0331
                                        last edited by OwenD

                                        @ratrig0331
                                        Change your minSpace and maxSpace in the macro to reduce number of probe points
                                        Try 50 & 100

                                        The G1 is my bad
                                        I did a search and replace when I was changing the braces, but changed one that should remain a square bracket

                                        Change this line in superslicer
                                        G01 X0 Y{"{move.axes{1}.max}"} Z0.6 F1500 ; Move to back corner while heating
                                        To
                                        G01 X0 Y{"{move.axes[1].max}"} Z0.6 F1500 ; Move to back corner while heating

                                        Or delete the line if you don't want to move there while heating

                                        RatRig0331undefined 1 Reply Last reply Reply Quote 0
                                        • RatRig0331undefined
                                          RatRig0331 @OwenD
                                          last edited by

                                          @owend

                                          One down one to go I’m still getting the m557 error with the 50/100 spacing will this be normal a normal error from down sizing the bed mesh or is there a fix

                                          Error: M557: bad grid definition: Spacing too small

                                          ——-Error: in GCode file line 773: G1: expected '}'———- is now fixed

                                          jay_s_ukundefined 1 Reply Last reply Reply Quote 0
                                          • jay_s_ukundefined
                                            jay_s_uk @RatRig0331
                                            last edited by

                                            @ratrig0331 the most probe points you can have on a duet 2 are 121 and on a duet 3 are 441

                                            Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

                                            RatRig0331undefined 1 Reply Last reply Reply Quote 0
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