New IR z probe issues

Phaedrux

@Phaedrux said in New IR z probe issues:

https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe

There's a really good method for measuring the offset described in there.

agent0810

@Phaedrux said in New IR z probe issues:

https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe

Here is an easy way to measure the offset:
Tape down a piece of paper onto the bed.
Bring the nozzle down to the bed surface and lower it until the nozzle starts to depress into the paper, making a small impression.
Mark the impression with a marker tip to make it more visible.
Now jog X and Y until the probe is directly over the spot where the nozzle was.
Take the amount you jogged as your X and Y offset to use in G31.

i did exactly this step right here and got the 50, didnt think that since its to the left of the nozzle it would be -50.

Phaedrux

That's kind of how the cartesian coordinate system used by 3d printers works.

Phaedrux

@agent0810 said in New IR z probe issues:

Take the amount you jogged as your X and Y offset to use in G31.

I'll add a note about negative values there.

agent0810

@Phaedrux
sorry, just new to this and trying to take in a lot, im def a noob.

so would this be right:

M557 X-50:165 Y15:195 S20 ?

Phaedrux

Not exactly. M557 defines the area of the bed you want probed, so negative values would mean outside of the bed area.

M557 X10:175 Y10:215 P8 Should probably work.

X175 because the probe can only reach 50mm away from the right edge of the bed which you've got defined as 225. So 225-50 = 175.

P8 means try to fit 8 points in both X and Y directions.

S20 you had before means space the points 20mm apart.

We're all noobs at some point.

agent0810

@Phaedrux
alright ill give that a shot. see what happens. thank you

agent0810

@Phaedrux

why do i get the feeling this isnt good lol

Phaedrux

Well it's a good start.

The offset would likely be because the Z axis was homed with an endstop rather than the probe.

It's actually getting quite difficult to navigate this thread since it's getting so long. Might I suggest creating a new thread with your new issues. Include your full config.g and homing files. The results of M122 never hurt to include either. Having all those details in the first post makes it a lot easier to refer to.

agent0810

@Phaedrux

done. thank you again for all your help.

https://forum.duet3d.com/topic/17871/issues-with-ir-probe-offset

Saurabh

Hi @Phaedrux , Where can I get the kicad schematic file of Mini Height sensor board. I can see .png files of schematics and board on Github Here.

Phaedrux

@Saurabh Please start a new thread.