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    Only probe where the part will be printed

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    • 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

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            It seems things like [first_layer_temperature_0] have been replaced by {first_layer_temperature[0]}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

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                  • 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.

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                    • 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

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                          • 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

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                              • 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
                                        • RatRig0331undefined
                                          RatRig0331 @jay_s_uk
                                          last edited by

                                          @jay_s_uk too many points isn’t the issue I think, it must be too few points? With the settings first told to me it wanted to do a 13x12 grid on a 100mmx100mm print 156 points total, than I changed the min max to 50/100 and it only probed the middle and 4 conners and gave the same error

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

                                            @ratrig0331

                                            I believe the problem you are having is that I didn't allow for a probe that was offset to the other side of the extruder to mine.

                                            Try these files.
                                            I think it should sort it out.

                                            ;setDefaultProbePoints.g - to be called from config.g after Z probe configuration section and any time defaults need to be reset.
                                            
                                            var SafeZone = 10 ; probing won't be done closer than this amount from bed edge - adjust as required
                                            var defaultProbeSpacing = 50 ; default mesh grid spacing in mm - adjust as required
                                            
                                            ; shouldn't need to edit after here
                                            var MinReachableX = max(0,sensors.probes[0].offsets[0]) + var.SafeZone
                                            var MaxReachabeX = move.axes[0].max - abs(sensors.probes[0].offsets[0]) - var.SafeZone
                                            var MinReachableY =  max(0,sensors.probes[0].offsets[1]) + var.SafeZone
                                            var MaxReachabeY = move.axes[1].max - abs(sensors.probes[0].offsets[1]) - var.SafeZone
                                            
                                            M557 X{var.MinReachableX,var.MaxReachabeX} Y{var.MinReachableY,var.MaxReachabeY} S{var.defaultProbeSpacing}; define mesh grid
                                            ;echo "M557 X"^{var.MinReachableX}^","^{var.MaxReachabeX}, "Y"^{var.MinReachableY}^","^{var.MaxReachabeY}, "S"^{var.defaultProbeSpacing}
                                            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]
                                            
                                            

                                            revised mesh.g

                                            ;0:/sys/mesh.g
                                            ; run when G29 with no paramters is called.
                                            ; if this file not found G29 S0 will run
                                            var SafeZone = 3 ; safety margin for probing near edge.
                                            var MinSpace = 20 ; put default minimum spacing
                                            var MaxSpace = 60 ; put default maximum spacing
                                            
                                            ; these values are place holders aand will be calculated later
                                            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 ProbeCenterX = 90 ; will be updated to probe centre of print
                                            var ProbeCenterY = 90 ; will be updated to probe centre of print
                                            var ProbeNumX = 8 ; put default number of probe points
                                            var ProbeNumY = 8 ; put default number probe points.
                                            
                                            
                                            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
                                            
                                            
                                            if exists(global.minProbeX)
                                            	if global.minProbeX < max(0,sensors.probes[0].offsets[0]) + var.SafeZone
                                            		echo "minProbeX (" ^ global.minProbeX ^ ") unreachable - reset to " ^ (sensors.probes[0].offsets[0] + var.SafeZone)
                                            		set global.minProbeX = max(0,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 - abs(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 - abs(sensors.probes[0].offsets[0]) - var.SafeZone
                                            	set var.m557MaxX = global.maxProbeX
                                            
                                            if exists(global.minProbeY)
                                            	if global.minProbeY < max(0,sensors.probes[0].offsets[1]) + var.SafeZone
                                            		echo "minProbeY (" ^ global.minProbeY ^ ") unreachable - reset to " ^ (sensors.probes[0].offsets[1] + var.SafeZone)
                                            		set global.minProbeY = max(0,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 - abs(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 - abs(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
                                            
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