Help, Mesh Bed Compensation
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Hi all, I need some help to setup Mesh Bed Compensation. I got confused (specially with Dive and Trigger hight) because I have two tools, and the Zprobe (Z switch) is actually shorter than the nozzle (when the tool is selected). So when i home Z (or probe the bed) there should be no tool selected. Wanna start using mesh compensation, never used it.
My current tool offsets:G10 P0 X0 Y0 Z-1.6 ; set tool 0 axis offsets
G10 P1 X0 Y0 Z-1.7 ; set tool 1 axis offsets; Configuration file for Duet WiFi (firmware version 3.3)
; executed by the firmware on start-up
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; generated by RepRapFirmware Configuration Tool v3.3.10 on Sat Dec 18 2021 14:22:20 GMT+0100 (Central European Standard Time); General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"RK3D Tool Changer" ; set printer name
M669 K1 ; select CoreXY mode; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet; Drives
M569 P0 S1 ; physical drive 0 goes forwards
M569 P1 S0 ; physical drive 1 goes backwards
M569 P2 S0 ; physical drive 2 goes backwards
M569 P3 S0 ; physical drive 3 goes backwards
M569 P4 S0 ; physical drive 4 goes backwards
M584 X0 Y1 Z2 E3:4 ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z800.00 E2208.00:2208.00 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E40.00:40.00 ; set maximum instantaneous speed changes (mm/min)
M203 X30000.00 Y30000.00 Z960.00 E4800.00:4800.00 ; set maximum speeds (mm/min)
M201 X10000.00 Y10000.00 Z50.00 E1200.00:1200.00 ; set accelerations (mm/s^2)
M906 X1100 Y1100 Z1500 E400:400 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X430 Y365 Z430 S0 ; set axis maxima; Endstops
M574 X1 S1 P"xstop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop
M574 Z1 S1 P"zstop" ; configure Z-probe endstop for low end on Z; Z-Probe
M574 Z0 P"nil" ; no Z endstop switch, free up Z endstop input
M558 P5 C"zstop" H5 F120 T3000 ; Z probe connected to Z endstop input
; set Z probe type to switch and the dive height + speeds
G31 P500 X0 Y0 Z-5 ; set Z probe trigger value, offset and trigger height
M557 X15:385 Y40:300 S40 ; define mesh grid; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B3950 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S280 ; set temperature limit for heater 1 to 280C
M308 S2 P"e1temp" Y"thermistor" T100000 B3950 ; configure sensor 2 as thermistor on pin e1temp
M950 H2 C"e1heat" T2 ; create nozzle heater output on e1heat and map it to sensor 2
M307 H2 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H2 S280 ; set temperature limit for heater 2 to 280C; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1:2 T45 ; set fan 1 value. Thermostatic control is turned on; Tools
M563 P0 S"Left0.6mm" D0 H1 F0 ; define tool 0
G10 P0 X0 Y0 Z-1.6 ; set tool 0 axis offsets
G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C
M563 P1 S"Right0.4mm" D1 H2 F0 ; define tool 1
G10 P1 X0 Y0 Z-1.7 ; set tool 1 axis offsets
G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C; Custom settings are not defined
M501 -
undefined RajaaKahel marked this topic as a question
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@dc42
Can you guide me please to get started? -
@rajaakahel said in Help, Mesh Bed Compensation:
; Endstops
M574 X1 S1 P"xstop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop
M574 Z1 S1 P"zstop" ; configure Z-probe endstop for low end on Z
; Z-Probe
M574 Z0 P"nil" ; no Z endstop switch, free up Z endstop input
M558 P5 C"zstop" H5 F120 T3000 ; Z probe connected to Z endstop input
; set Z probe type to switch and the dive height + speeds
G31 P500 X0 Y0 Z-5 ; set Z probe trigger value, offset and trigger height
M557 X15:385 Y40:300 S40 ; define mesh gridWhat do you have for a probe now?
Do you actually use a z endstop, or just the probe?You currently have a z endstop defined with M574 using zstop pin and the probe with M558 also using the zstop pin. If you don't want to use a z endstop at all, just don't define one in the first place.
What firmware version are you using?
It shows your trigger height as -5, how did you come to that? I would think that it would make more sense to set G31 X0 Y0 Z0 and then use the tool offsets to define where the nozzle tip is in relation to that 0,0,0 point.
Since you need the tools docked before you can do a mesh, you might be nest served by creating a mesh.g file in the system folder. In it you could define exactly what you wanted to happen before doing the mesh. Set the bed temps, wait, deselect all tools, and then send G29 S0 to mesh the bed.
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What do you have for a probe now?
Do you actually use a z endstop, or just the probe?The probe is a DIY switch, it's a Z endstop and a probe at the same time.
You currently have a z endstop defined with M574 using zstop pin and the probe with M558 also using the zstop pin. If you don't want to use a z endstop at all, just don't define one in the first place.
I want to use my DIY switch as a probe and it's probing fine, but my problem is with dive and trigger heights.
What firmware version are you using?
V3.3.It shows your trigger height as -5, how did you come to that? I would think that it would make more sense to set G31 X0 Y0 Z0 and then use the tool offsets to define where the nozzle tip is in relation to that 0,0,0 point.
That trigger height is just from the configuration tool, wasn't sure what to choose/do first.Since you need the tools docked before you can do a mesh, you might be nest served by creating a mesh.g file in the system folder. In it you could define exactly what you wanted to happen before doing the mesh. Set the bed temps, wait, deselect all tools, and then send G29 S0 to mesh the bed.
That's good to know!
I'll try to read the documentation again from the beginning, hopefully i get the things in the right order.
Thanks for the input
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@rajaakahel to clarify a few things...
You have a z probe. It is a switch, but you can move it around to trigger it at different x & y positions (e.g. to create a heightmap), so is classed a a z probe. A z endstop would typically be rigidly mounted to the frame
The dive height is how far the probe should dive (or the bed rise) during a probing move. It is ignored when the z axis is unhomed.
In a 'normal' printer you typically set the tool offsets to 0, the use G31 to set the probe offsets and trigger height. However like @Phaedrux says, on a toolchanger printer with a probe like yours (and the e3d system), it is typically easier to set the probe offsets and trigger height to 0, and set the individual tool offsets (in x y and z) relative to the probe. That way you don't have to double measure everything etc
Hope that makes sense...
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@engikeneer Thank you, it makes sense!
I got it to probe successfully now. And trying to figure out why it not compensation well. I see the Z motor moving tho. But still a bed corner got squished wide line and another corner is too thin.
