Precision piezo auto bed compensation issues. Please help.
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@PeterA said in Precision piezo auto bed compensation issues. Please help.:
M574 X1 Y1 Z1 S0 ; Set active low endstops
you configured z as an endstop rather than a probe
M574 Z1 S2 ; set endstops controlled by probe
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@Veti said in Precision piezo auto bed compensation issues. Please help.:
M574 Z1 S2
Thanks for helping,
I put the M574 Z1 S2
in my file, but now it drills down into the bed. ;(
I tried this as well
M574 X1 Y1 S0
M574 Z1 S2Didn't get to the auto mesh as it drills down when homeing. Is the config.g the right place to put this?
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I use the Orion on my CoreXY printer. It works very nicely!
In my config.g I have the following to set up the probe and grid, the Orion is connected to the Z-probe input on the Duet WiFi:
; Z-Probe
M574 Z1 S2 ; Z end stop is probe at low value
M558 P8 R0.4 I1 H5 F360 T6000 ; Set Z probe type to inverted, unfiltered piezo and the dive height + speeds
G31 P500 X0 Y0 Z-0.015 ; Set Z probe trigger value, offset and trigger height
M557 X5:290 Y5:275 P14 ; Define mesh gridWhen I home Z, my homez.g macro contains:
G91 ; relative positioning
G1 Z5 F360 S2 ; lift Z relative to current position
G90 ; absolute positioning
G1 X148 Y140 F6000 ; go to homing probe point
G30 ; home Z by probing the bed; Lift Z again after probing
G91 ; relative positioning
G1 S2 Z5 F360 ; lift Z relative to current position
G90 ; absolute positioningAnd when I create a new levelling mesh, I have a macro which does this:
M291 P"Do you really want to create a new levelling mesh?" R"Create Levelling Mesh" S3
G28 ; Home all
G91 ; Set relative positioning
G1 Z50.0 F360 ; Move the platform down to save cooking things
M291 P"Heating, don't go away!" R"Create Levelling Mesh" S0 T5
M104 S130 ; Start heating extruder
M190 S75.0 ; Heat bed and wait for it to reach temperature
M109 S130 ; Wait for extruder to reach temp before proceeding
M291 P"Make sure head is free from plastic and press OK" R"Create Levelling Mesh" S2
G29 S2 ; clear any current levelling map
M561 ; clear any bed transforms to start levelling from scratch
G28 ; Home all (also does three motor Z plane correction)
G29 S0 ; Do mesh probing, save and activate results
G1 Z50.0 F360 ; Move platform down
M104 S0 ; hot end heater off
M140 S0 ; bed heater off
M291 P"Finished!" R"Create Levelling Mesh" S0 T5When printing, I put G32 in my start g-code in the slicer. Instead of having G32 create a new levelling mesh via bed.g, I first make sure that the bed and hot end are heated to the same temperature as I used when creating the levelling mesh, then G32 makes bed.g run which merely does this:
G29 S2 ; clear any currently active mesh
M561 ; clear any bed transforms to start levelling from scratch
G28 ; Home all (also does three motor Z plane correction)
G29 S1 ; Load heightmap.csv and activate it -
@grizewald
Hey thanks for that. I’m not at the printer till tomorrow now but I will defiantly try a few of those settings.
Keep my fingers crossed as I've spent hours trying to solve it.
I'll let you know how it goes. -
@PeterA My settings should work fine for you. The important things are that the probe is defined as such and not as an end stop, as Veti pointed out. Also that your probe is connected to the Z-probe input and not an end-stop input.
I've actually refined my solution even more. I noticed that the way my print bed deforms is very temperature dependent. It's much more flat at higher temperatures, so I now have two macros to create a levelling map - one at 55C and the other at 75C. So I have two maps to choose between and I use filament specific G-codes in my slicer to load the correct map depending on if I'm printing PLA or PETG/nylon.
You should also check that your probe triggers properly. If I've replaced a part or worked on my hot end mount, I always double check that the probe is working as expected before homing or doing anything that depends on the probe. I've found that just tapping the nozzle from underneath with a fingernail should always make the blue LED blink on and the red LED go off for a moment. If that happens and the configuration is correct then I know that probing from 5mm height with a speed of 6mm/s will always result in the probe triggering
Good luck!
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@PeterA said in Precision piezo auto bed compensation issues. Please help.:
Error: Z probe was not triggered during probing move
Still problems.
My piezo wors as it it triggers great. Red led on, touches bed blue flashes and when homing it works.
When using home all or home z it works beautifully with the homez.g settings bellow. however my config.g has to have this line
M574 X1 Y1 Z1 S0 ; Set active low endstopsIf I put M574 Z1 S2
Then when homing it pushes down into the bed.The problem is trying to set it on auto mesh, the z triggers (blue light as touches the bed) but it pushed down at least 5mm. The error is as before Error: Z probe was not triggered during probing move But I can see it was and when normal homing it triggers and works correctly.
The auto mesh starts and homes, triggers great and sets itself, then it moves on to the first point and moves down onto the bed, blue light triggers as before, but it goes down a further 5mm.
I’ve tried @grizewald settings but it drills down into the bed on homing unless I change the m574 to z1 s0. Then back to the original problem. Homing then works but everything else drills down into the bed.My homez.g
; generated by RepRapFirmware Configuration Tool on Mon Dec 24 2018 18:36:17 GMT+0200 (South Africa Standard Time)
;G31 Z0 P1000 ; peters attempt and the piezo
G91 ; relative positioning
G1 Z3 F800 S2 ; lift Z relative to current position
G1 S1 Z-275 F400 ; move Z DOWN until the endstop is triggered
G1 Z2 F300 S2 ;LIFT Z FOR SECOND PROBE
G1 S1 Z-5 F80 ; move Z DOWN until the endstop is triggered
G92 Z-0.2 ; set Z position to axis minimum (you may want to adjust this) -
is there any way the wireing could be wrong with the red light on and the blue light triggering? It doesn't seem logical but I'm lost.
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Post your entire config.g, homeall.g and bed.g
Can you confirm that your Orion is connected to the port labelled "Z Probe Header" in this picture?
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@PeterA said in Precision piezo auto bed compensation issues. Please help.:
@PeterA said in Precision piezo auto bed compensation issues. Please help.:
Error: Z probe was not triggered during probing move
Still problems.
My piezo wors as it it triggers great. Red led on, touches bed blue flashes and when homing it works.
When using home all or home z it works beautifully with the homez.g settings bellow. however my config.g has to have this line
M574 X1 Y1 Z1 S0 ; Set active low endstopsIf I put M574 Z1 S2
Then when homing it pushes down into the bed.The problem is trying to set it on auto mesh, the z triggers (blue light as touches the bed) but it pushed down at least 5mm. The error is as before Error: Z probe was not triggered during probing move But I can see it was and when normal homing it triggers and works correctly.
The auto mesh starts and homes, triggers great and sets itself, then it moves on to the first point and moves down onto the bed, blue light triggers as before, but it goes down a further 5mm.
I’ve tried @grizewald settings but it drills down into the bed on homing unless I change the m574 to z1 s0. Then back to the original problem. Homing then works but everything else drills down into the bed.My homez.g
; generated by RepRapFirmware Configuration Tool on Mon Dec 24 2018 18:36:17 GMT+0200 (South Africa Standard Time)
;G31 Z0 P1000 ; peters attempt and the piezo
G91 ; relative positioning
G1 Z3 F800 S2 ; lift Z relative to current position
G1 S1 Z-275 F400 ; move Z DOWN until the endstop is triggered
G1 Z2 F300 S2 ;LIFT Z FOR SECOND PROBE
G1 S1 Z-5 F80 ; move Z DOWN until the endstop is triggered
G92 Z-0.2 ; set Z position to axis minimum (you may want to adjust this)Your homez.g is using the probe as an end stop and not as a probe. If you look again at my homez.g you will see that I use the command G30 to home the Z axis. G30 means "probe the bed". You are telling the printer that you are using a Z end stop and not a Z probe.
You must configure the probe as a probe and use it as a probe. It is not an end stop!
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@grizewald said in Precision piezo auto bed compensation issues. Please help.:
G32
Holy Cow!! How backward can I be. My wires are connected to the endstop. Thanks for the picture, with out it I would have been convinced we where talking about the same thing.
I've just redone it now and started the mess. Looks like its working.
Many Many thanks. You've been a huge help. -
@PeterA said in Precision piezo auto bed compensation issues. Please help.:
@grizewald said in Precision piezo auto bed compensation issues. Please help.:
G32
Holy Cow!! How backward can I be. My wires are connected to the endstop. Thanks for the picture, with out it I would have been convinced we where talking about the same thing.
I've just redone it now and started the mess. Looks like its working.
Many Many thanks. You've been a huge help.My pleasure!
