I want to give you a feedback: I was wrong! I had to lower the y axis. I adjusted it and now my maximum deviation is about 0.2 mm. I feel good with it!
I printed some califlowers and could fine-tune the Skew with a M556.
I think my machine back in business!
Thx for your help!
I want to give you a feedback: I was wrong! I had to lower the y axis. I adjusted it and now my maximum deviation is about 0.2 mm. I feel good with it!
I printed some califlowers and could fine-tune the Skew with a M556.
I think my machine back in business!
Thx for your help!
thx for your message! You're right, and i do a full homing if do a simulation. Maybe it's helpful for you, but I also figured out, that I can also run into this issue if I abort a print. It's not only restricted to the simulation.
maybe we have a little misunderstanding. You're 100 % right but here in this case @droftarts gave me a hint regarding the gantry adjustment based on the height map. My question is, if I have to interpret the result of the height map in the opposite direction.
In the heightmap the positive z- axis is pointing upwards, but in reality a high z-value means that my bed is moving downwards.
And in the Duet Web Control you have this "invert z coordinates". In wich case I have to use it?
Here without the slider:
Here with the slider:
I would assume, that in my case I have to invert the coordinates.
@droftarts
Hi Ian, maybe I'm stupid, but are you sure that I have to lift the rail?
Also looks like your tramming on the Y axis is a bit off, with the back right being high in the mesh, so linear rail is a bit low back there.
I thought a bit about it, and in reason to the point that my printer is a core XY which means, that the z- axis is working to the opposite direction (pointing downwards) , I guess I have to lower the rail.
I assume I have to think inverse.
For Example: If I want to have a z movement of z= 20 mm the printer would lower the bed, because the printhead can't move in z direction.
So with this in mind I would assume, that a positiv z- value in the height map means that the point is more away from the nozzle.
If this theory is correct, I have to lower the y axis on the right side.
I hope you understand what I mean.
kind regards
Dennis
This helps a lot! Thank you!
On Saturday I will mount a dial gauge with a magnetic base on the printer and try to adjust the back of the y axis.
Regarding the levelling/bed mesh: If I understood your advices in the right way the process should be:
1 Turning the printer on
2 creating a flat plane
M561 (Clear all mesh compensation)
*1-2 laps of bed levelling
2.1 If I do a bed mesh:
homing z again
2.2 With no bed mesh
3 print and having fun!
Is this correct?
The M557 for defining the mesh grid is in your config.g?
@Anawandur said in Bed Leveling only on Print Aerea:
Hello,
I have a topic that I can't find much about. Is it possible to level only the print area before printing?
This can save you a lot of time.
Do you looking for an automated or scripted solution?
If not you can define the Area of the Mesh compensation individual by a M557
See here: https://docs.duet3d.com/User_manual/Reference/Gcodes#m557-set-z-probe-point-or-define-probing-grid
I would assume that with some variables it's also the basement for a scripting solution.
I don't know if this would solve your problem, but in general you have
@droftarts said in Adjusting the Nozzle height:
Where is the linear rail on the gantry? If it's on the front, it could be this has been displaced upwards in the middle by 0.16mm. You could try slackening off the bolts and realigning. To check if the gantry has been twisted, remove it and put it on a very flat surface, and see if you can see the twist; you may then be able to gently lever/twist it back.
The linear rail is on the top of the gantry. Here you can see an example which I took from a video on YouTube:
Also looks like your tramming on the Y axis is a bit off, with the back right being high in the mesh, so linear rail is a bit low back there.
What would do you do? Loosen the Bolts in the right back and try to "adjust" the back the y Axis by slightly knocking with a hammer?
Otherwise, I wish my beds were as flat as that! This is my TronXY X5S, bed mesh from Scanning Z Probe
Oh hell, I thought my deviation is way too high. Before the crash it was less than 0.1mm over all. And I thought this was high :). But now I have the hope that I don't have to buy a new gantry.
But in general my head won't stop thinking and I ask myself what's THE or the best way for dealing with the z-offset?
Is it:
In general to get a basement:
*heating up to the print temperatures
*levelled bed (some laps of bed levelling)
*M561 to clear any transformation
*calibration of the nozzle clearance and the trigger height with adjusting it in the config.g
Before a print:
*homing the z-axis
*some laps of bed levelling until the adjustment is low enough (normally around 2-3 laps)
*run a mesh compensation of the print area
*printing?
Is this okay or are there some stupid mistakes?
I did the bed mesh, and unfortunately I think you're right. I guess my x-Axis Rail is bent in reason of the crash due to the firmware error.
This would be really sad, because this rail was really expensive (because its a milled out lightweight rail).
But I also think I have some skew, if you look at the right side (rear).
Here is the table of the bed mesh
RepRapFirmware height map file v2 generated at 2024-08-28 15:44, min error -0.160, max error 0.275, mean -0.052, deviation 0.085
axis0,axis1,min0,max0,min1,max1,radius,spacing0,spacing1,num0,num1
X,Y,20.00,260.00,20.00,260.00,-1.00,20.00,20.00,13,13
-0.036, -0.069, -0.110, -0.130, -0.150, -0.150, -0.140, -0.120, -0.089, -0.059, -0.030, -0.010, 0.015
-0.025, -0.074, -0.100, -0.115, -0.130, -0.135, -0.120, -0.100, -0.059, -0.030, -0.010, 0.025, 0.061
-0.044, -0.089, -0.115, -0.135, -0.145, -0.145, -0.130, -0.100, -0.054, -0.020, 0.005, 0.031, 0.056
-0.049, -0.089, -0.115, -0.130, -0.135, -0.135, -0.125, -0.105, -0.059, -0.030, 0.000, 0.041, 0.086
-0.035, -0.084, -0.105, -0.125, -0.135, -0.130, -0.115, -0.089, -0.049, -0.015, 0.015, 0.056, 0.095
-0.049, -0.094, -0.125, -0.145, -0.155, -0.150, -0.155, -0.125, -0.094, -0.039, -0.010, 0.036, 0.090
-0.049, -0.105, -0.130, -0.145, -0.160, -0.155, -0.145, -0.125, -0.079, -0.044, -0.015, 0.025, 0.076
-0.044, -0.100, -0.125, -0.145, -0.150, -0.150, -0.135, -0.105, -0.069, -0.049, -0.015, 0.036, 0.100
-0.044, -0.094, -0.115, -0.135, -0.140, -0.135, -0.125, -0.105, -0.064, -0.035, 0.010, 0.056, 0.120
-0.039, -0.084, -0.110, -0.125, -0.130, -0.130, -0.120, -0.094, -0.049, -0.015, 0.015, 0.071, 0.166
-0.025, -0.078, -0.094, -0.110, -0.110, -0.105, -0.094, -0.064, -0.030, 0.005, 0.056, 0.120, 0.191
-0.015, -0.059, -0.084, -0.094, -0.115, -0.100, -0.084, -0.054, -0.015, 0.015, 0.051, 0.125, 0.240
0.015, -0.035, -0.054, -0.069, -0.059, -0.079, -0.044, 0.010, 0.061, 0.100, 0.150, 0.196, 0.275
Hello,
i have an Ratrig V-Core 3 with an Duet 6HC Mainboard. I did a FW update (FW 3.5.2) and after a big crash I had to rebuild the the Printer and now I have some issues with a z-Offset during adjusting the Nozzle height which I don't understand so far.
(Before the crash and with the old FW I never had issues like this and at the moment it's driving me crazy.
Maybe my procedure is wrong, but then I hope, you can help me.
Configuring the Nozzle height.
But If I do a bed levelling by a G32, it reports me, that all of my 3 measure points have an offset of nearly 0.15 mm
Leadscrew adjustments made: 0.167 0.162 0.163, points used 3, (mean, deviation) before (0.164, 0.002) after (-0.000, 0.000)
The second round of a G32 is better with lower amounts:
Leadscrew adjustments made: 0.001 0.002 -0.015, points used 3, (mean, deviation) before (-0.004, 0.007) after (0.000, 0.000)
So far so good. But if I do then an Z-Homing with follows by an G32, the first round of G32 is telling me, that the adjustments made are around 0.13 - 0.17 mm.
The second round is okay with adjustmens made around 0.001-0.02 mm .
But every time I do an z-Homing and do then a G32, the first round of G32 is telling me, that it made this kind of adjustments around 0.13 -0.17 mm. And because it's on all of my three z-axis, i understand I have an overall offset which has to be adjusted.
I don't know where this offset is coming from?
I can repeat it as often as you like: The first G32 after a homing is telling me, that it has to adjust all 3 axis by 0.13 - 0.17 mm...
I never hat this behaviour before the crash with the old firmware.
In the past it was like: I calibrated the zero point of the z axis with a levelled bed, and if I do an G32 after it to check if the bed is still levelled, the reported adjustments were like around 0.003 mm.
But I can't imagine that my bed is bent after the crash. It's a solid aluminium plate with a thickness of 6.1 mm.
Any Ideas or am I doing a mistake?