Z-tilt configuration
When working on running the Pressure Advance config print. The x and y and z homes ok but when it starts the z-tilt calibration, it errors when it goes to the back left corner for being unable to see the probe. The reason why is, it has dropped the back motor down so the probe can't see the bed. I've reset the bed position a couple of times with the same result. What do I adjust to get it to not drop the back z motor down?
52 Replies
whats the exact error message?
No trigger on probe after full movement
If you try to move the machine in Z, do all three motors move the same way?
yes, I can drive the bed up and down and it stays level
when does the "back motor drop down"?
during z-tilt after starting the print
If you run z-tilt directly does it work?
let me try just z-tilt in the command line?
no, the button
same issue,but while I was in that area, I increased the distance the z moved at one time and that is having issues. The motors are definitely not rotating the same distance
That'd do it. Double check that your motor couplers are tight, and tightened against the flat on the shaft if there is one
visually, check that the 3 z shafts are the same pitch
and then drop your klippy.log in here and we can check to see if the steps_per_rotation are all the same
Here's the klippy log. Off to do some checking
Everything looks good on the config, hoping you find something mechanical
couplers are tight, reseated all the connectors but same issue
Swap motor drivers, see if the issue moves, swap motor cables, swap motors...
Got that I think, Still same issue though. Is there a way to home the z using the back of the plate?
uhh, you could change the z homing position
i'm not sure what that would do for ya
I just don't understand why the probe works in the middle but not the back
Seems like it should home front middle and back to level the plate
during homing it is moving all 3 together. During z-tilt is is measuring and adjusting the height near each z-screw
I guess I could set the max z lower so it can get there but to me homing should take care of that
we're still trying to fugre out why your rear z is dropping, right?
yes
location of z homing nor starting height of z should matter.
When it z-tilts, it is going to the front right, then front left, then to the rear, yea?
right
and it only fails when it gets to the rear?
yes
it runs out of z max (at -5)
is the beacon still very much above the bed when it tries to do the rear?
I'm wondering if your y endstop is too far back and its running off the bed
This one isn't a beacon, still old school
The probe is stopping over the bed though
Oh! Sorry. So many vcore4's coming here for help I assumed.
It will be a 3.1 hybrid though eventually
Are you sure they are plugged in correctly? It might be trying to adjust one but because it is plugged in wrong it is actually adjusting a different stepper
I did do the buzz test in the beginning so I don't think so. How do I move the start point in a bit instead of probing the edge of the bed? do I increase the endstop position?
Your motors are not configured correctly (z1 is linked to z2 in the firmware or something). I just had the same problem after installing ratos 2.1
I think the tooltips on the motors during the config wizard were wrong (left z motor was actually the back one).
Is this part of the documentation correct?
The Z0 Stepper must be connecter to driver 5.
Z0 is the front left stepper, when looking at the machine from the front.
The Z1 Stepper must be connecter to driver 6.
Z1 is the rear stepper, when looking at the machine from the front.
The Z2 Stepper must be connecter to driver 7.
Z2 is the rear stepper, when looking at the machine from the front.
the locations are correct, dunno about the driver numbering. I'd trust the docs
running these commands matched that doc:
1:07 PM
stepper_buzz stepper=stepper_z2
1:06 PM
stepper_buzz stepper=stepper_z1
1:06 PM
stepper_buzz stepper=stepper_z
Z2 is the front right but I think that is what they meant?
can you link me the doc you're using?
Rat Rig
12. Electronics
This guide is still in progress, as more detailed instructions on how to prepare all wires will be added in the next few days.
page 55
or step 55 rather
oh! I see the issue. It is called out in the comments.
@Cruz The comments on step 55 of the above link show how the step needs fixed.
you are correct, it is left to right as you're facing the machine z0, z1, z2. Left, Reat, Right
I have it wired according to that picture
which should be 6,7,8
We are working on it 💪 thanks for the feedback guys!
I have to have something backwards when it comes to z-tilt but I sure can't figure out what it is.
why do you believe that?
I can manually adjust to the point that it drops the front or the back but never does it try raising a corner. Even when I start it with the front noticeably lower it still drops the front when running the z-tilt. To the point that the sensor cannot see the bed then errors.
Ahhh, okay.
But you can home z?
Yes homing works perfect
If homing works then the software knows how to move the bed correctly
I can verify that I got the same behaviour when I had the z motors linked to the wrong drivers. Try switch them up.
Eternal, I verified that according to the build manual, that they are correct. Does your motors not match the build manual ? I'll give it a shot though, thanks for the idea
No luck, I tried each combination but ended up with the same errors.
I set the printer profile up as core xy instead of hybrid. I had to move the motor cables to match the core xy diagram on the octopus and z-tilt worked the first time. Either the hybrid belt has to be installed (which doesn't make much since to me because the toolhead was moving in the y direction without it or something is not right with the wiring diagram(I think I tried every combination so not convinced on this either) or the hybrid config when using it on a 3.1 build. I had to flip the left and right motors on the octopus to get homing to work. I think this is what may have been causing issues with the z-tilt not working. For now I just want to see this thing print so I'm leaving it here and continuing on with the setup. Thanks for all the suggestions
thank you so much you saved my day