Probe misses the bed and doesn't detect it during calibration, causing the nozzle to push very hard.
Greetings all. I have an issue with the inductive probe on my V-Minion (full kit).
It just misses the bed and doesn't detect it. Is there a way to set probe offset? The software seems to think the probe is closer then it actually is.
I have measured the rail spacing (y-axis) and checked everything else, looks fine according to the guide. Any help is appreciated. Thanks!
19 Replies
you can set your probe points in printer.cfg just move them well over the bed for initial testing
set your z_offset to something like 10+mm, then run the probe_calibrate macro to home in on the proper z_offset.... caveat...manually test your probe to validate it's triggierng. There's a little red LED on top under the potting where the wires come out.
sensitive-blue•16mo ago
But it is not the z offset that is the problem, rather the y offset
sensitive-blue•16mo ago
This is the issue in question. When i probe by typing the command it calibrates fine, but when it automaticaly probes before a print it starts in this position, missing the bed completely on the y-axis.
your mesh min/max values are simply set wrong in printer.cfg. raise x/y mins and lower xy maxes
sensitive-blue•16mo ago
Before and after. Is this ok? @ptegler
just to test set both X and Y min to 100 and see where it lands (hand ready to EMO) then adjust from there
sensitive-blue•16mo ago
I set them as you said. It gives me an error: Option ''min_x'' is not valid in section ''heater_bed''. After I greyed out the newely set min_x value, it says the same thing but with max_x, then min_y then max_y.
woah...WRONG place.... note the first line visible in your screen captures.
All that stuff is strictly when you do a
you need to do it way further back up in printer.cfg
example:
sensitive-blue•16mo ago
I assumed it was the wrong place thats why I sent you a screenshot. Bed mesh and its settings are not showing up on printer.cfg . Should I add them manually?
yes
sensitive-blue•16mo ago
I added them. During probing the bed mesh is fine, but when it starts prime blob right before print, the y axis just moves to (almost) 0 and now the NOZZLE misses the bed completely. I had to issue an emergency stop. I should probably mention that I had to reverse the direction of the y axis stepper motor in the printer.cfg because otherwise it just homes in the wrong direction.
This is all relative to you min/max bed size settings, and where your X and Y end stops are physically located. Look at it as settings configure the area of the frame, and settings configure a printable area. you need to configure the two squares to align properly over top each other. Mesh grid is the same. Your physical build could be just that far off, so where you have your X end stop,...can you move that to the left a couple millimeters?.... that would move the nozzle in your above picture as few millimieters left.
of just reduce the master size of your printer, example instead of 500 x 500 make it 498 x 498 etc etc
sensitive-blue•16mo ago
Where are the bed size settings located? Because there seems to be a lot missing in the printer.cfg file and I'm not sure what I need to add manually. There's nothing in the guide that seems to implicate that I need to add things.
Some of the beauty of RatOS is the 'clean up' of printer.cfg. straight up Klipper, EVERYTHING is in one big file (well..almost) the 'include' statements at the beginning of the printer.cfg contains LOTS of configuration information. Which ever printer 'include' you have uncommitted, you can go over in the files and look at the contents of those includes. anything you want to change just cut and paste those couple lines into your printer.cfg with modifications of the values as desired. I'd place thos 'pastes' right after {or close to) the original includes, as order of stuff in printer.cfg can have an effect on over all ops.
From what I can see in your pic above though, just moving your Y end stop mechanically, back a few millimeters will fix that Y overhang at the front
sensitive-blue•16mo ago
Im not sure Im following you. Im kinda new at this. Can you walk me trough with simple steps?
top of printer.cfg...there are a bunch of 'include' files you select to configure your printer.
look at the path of the file you have included. You can go to that file, The contents of that file are read in just as if it were IN the printer.cfg file itself. Anything in that 'include file' you can cut and paste into the printer.cfg to override those 'hidden' settings, and change them to anything you'd like.
sensitive-blue•16mo ago
This helped a bunch, thanks. I think I realised the issue but Im not sure how to fix it
For some reason the y axis either stepper motor or something other on it is struggling and can't move perfectly.
When I disconnect the motor and try to move it by hand it moves perfectly.
It also moves pretty well when I hold the heater bed cable and pull it with a very small amount of force.
So there might be something wrong with the motor itself. I will try to tighten it and check if all else is fine, but if you get any ideas in the meantime please let me know 🙂
if moving a motor cable effects ops...yes, you have a crimp of contact issue. fix asap first