#Nozzle crashing into bed after heatbreak change

12 messages · Page 1 of 1 (latest)

long timber
#

Hey guys, I'm facing an issue with z-offset after changing the heatbreak on my Revo hotend. I've swapped the heatbreak to this: https://www.aliexpress.com/item/1005008020221708.html?spm=a2g0o.order_list.order_list_main.23.347018020E0CMh and added a Bondtech CHT v6 nozzle. All components fit properly and tight, filament extrudes smoothly, and I had calibrated z-offset via probe calibration.

When starting a print, homing, QGL, and bed mesh procedures happen with no issues. However, after the line purge, the nozzle contacts and scrapes the bed instead of starting at the set z-offset position. I'm unsure why this is happening.

To troubleshoot, I did a probe accuracy test ensure the tap probe was probing correctly. The test resulted in a standard deviation of 0.002915, which I believe falls within the acceptable threshold according to the Voron build guide. I have also attempted to increase the z-offset slightly, but the issue persists.

Has anyone experienced this before or know of a solution?

Thanks.

wraith haven
long timber
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My bedmesh was on a separate file:


#####################################################################
#### Bed mesh config
#####################################################################

[bed_mesh]
speed: 800
horizontal_move_z: 5
mesh_min: 25,25
mesh_max: 300,300
probe_count: 5,5
algorithm: bicubic
#fade_start: 1
#fade_end: 5
#fade_target: 0
#zero_reference_position: 175,175

[gcode_macro BED_MESH]
gcode:
    M117 "Moving to custom position before mesh..."
    G90
    G1 X25 Y25 Z10 F6000  ; Move to desired position
    #G1 X175 Y175 Z10 F6000  ; Move to desired position
    BED_MESH_CALIBRATE ; Run the original mesh calibration
vivid moat
long timber
#

Hey @vivid moat thanks for getting back to me. I’ll try putting most of the includes code directly into the main printer.cfg and see how it turns out

vivid moat
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I'll be honest it's a wag more than anything.

long timber
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At this point, I'm trying anything that could help 😂

long timber
#

Fixed it and it was something quite silly. The hotend piece on the SB was slightly loose 😑

#

@wraith haven I'm unsure how to close this topic but please feel free to mark as solved 🙂 - thank you!

wraith haven
long timber
#

Ahh thats how you do it 😂 , thank you!