rattle on homing, running nozzle into the bed

GuruSMI

Hi out there,

i'm quite confised about the behavior of my printer. I made a coupe of changes to my anycubic Predator.

I changed the original Trigorille with a Duet2Ethernet. There V3.3 of RRF) is installed and used. I added a Duet3 Smart Effector. Also i changed the Titan Extruder to a bmg clone (I have layin' around an Hemera but didn't add yet). Also i changed the nema17 to 65Ncm versions. I use a dragon Hotend with a PT100 and a 50Q heater cartridge. I added linear rails with Haydn Huntley MagBallArms. Also i changed all fans by SunOn ones.

I wrote my config by my own and evrything worked. A few days ago i changed my Extruder to the hemera one and a couple of days later back to the BMG. As i changed the extruder i also changed some things inside the config.g. Since then everything behaves quite strange. i tried to print a file sliced by the actual Cura. I do only use original parts. Onlly the BMG is a clone. To have there also an original i bought that Hemera Bowden.

After all i got some quite strange synopses. When homing on DWC everything runs fine. when homing inside the Printfile the Z axes raattles like no good. When initiating an M119 after that rattle the system tells me that the z-axis is at Max (the sensor is working correctly).

First i thought that mi9cht be an hardware issue. But it seemed that it wasn't. So i installed the RRF mversions 3.22, 3.3 and the actual 3.4Beta7 to ensure it's about the firmware. When up-/downgrading the firmware the direction of the steppers changesd without touching the config.g. Also at homing the nozzle rams into the bed.

I have no glue what is going on and appreciate any help on this topic. Thanks in advance for that.

Actual Config.g
config 2021 12 28 0001.g
Actual Bed.g
bed.g

Phaedrux

Can you share the first 50 lines or so of a sliced gcode file?

@gurusmi said in rattle on homing, running nozzle into the bed:

When homing on DWC everything runs fine. when homing inside the Printfile the Z axes raattles like no good.

When you say homing in DWC you mean homing the towers? And when the print file homes, how is it doing that?

When you switched your extruder did you perhaps make an error of assembly of the smart effector? or is it perhaps damaged?

Can you share a video of the behaviour?

GuruSMI

@phaedrux
Yes. Pressing the button "Alle referenzieren". At all towers the sliders drive up to the endstop.

But i got the mistakes/errors i did.

I use3d accidently 160 Steps for my 0,9° steppers instead of 80 for my 1,8° ones.
and much more irritating i used a wrong polarization on the extruder. Testing the extruder everything ran fine except the z-axis endstop. I used the original Nema cable and also the connected plugs. And that went wrong. For the next time i will use the Molex Plugs and also change the full cavle as i did at all other ones. I also exchanged all other cables by own ones and used the Molex connects.

At last i need clean everything and check the PTFE way of the bowden down to the heatbreak of that hotend. This is needed as i used an (thingiverse redesigned) adapter for the Dragon/Dragonfly hotend.

As i use Version 3.3 of the firmware im a bit confised about some error messages. I reference all towers and a T0. I receive an error "Error: New tool too close to Z axis limit. Aborting tool change". Straight after i try it again and everything works fine. But it only happens when i try to set it active. Mysterious.