3DPrinting

15629 readers

490 users here now

3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

The r/functionalprint community is now located at: [email protected] or [email protected]

There are CAD communities available at: [email protected] or [email protected]

Rules

No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
Be respectful, especially when disagreeing. Everyone should feel welcome here.
No porn (NSFW prints are acceptable but must be marked NSFW)
No Ads / Spamming / Guerrilla Marketing
Do not create links to reddit
If you see an issue please flag it
No guns
No injury gore posts

If you need an easy way to host pictures, https://catbox.moe may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is ![](URL)

Moderation policy: Light, mostly invisible

founded 1 year ago

MODERATORS

Ender 3 Pro CR Touch Z-axis offset? (self.3dprinting)

submitted 1 year ago by PKRockin to c/3dprinting

8 comments fedilink hide all child comments

I just installed the CR Touch kit on my Ender 3 Pro. Everything is wired up, but I can't seem to get the Z-Axis offset correct. My process is:

Auto-Home
Step the Z-Axis down until there's slight resistance on a sheet of paper between the nozzle and bed
Take that value (Roughly -1.3) and put it into the Z-Axis Offset value
Level bed

All of this works, but when the bed is leveling, the CR Touch needle is hitting the bed way earlier than the nozzle by maybe a few mm. When I go to print, there doesn't seem to be adhesion in some places on the glass bed.

What am I doing wrong? :(

you are viewing a single comment's thread
view the rest of the comments

[–] p1mrx 3 points 1 year ago (1 children)

the CR Touch needle is hitting the bed way earlier than the nozzle by maybe a few mm

Have you noticed that the crtouch has an extendable probe? The probe should be lower than the nozzle when homing or leveling (so the nozzle doesn't hit the bed) and higher than the nozzle otherwise (so the probe doesn't hit your prints.)

I found that auto bed leveling worked poorly on my Ender 3 S1, because the Z axis was not well-adjusted enough to make fine movements without binding. I reassembled all the Z axis stuff, making sure the eccentric nuts were just loose enough to not support any weight. You want almost all the gantry weight supported by the the Z axis screw(s), because downward motion is gravity-driven. If the Z screws have to "pull down" on the ganty, then the Z movement will be too sloppy for bed leveling to work.

[–] PKRockin 1 points 1 year ago* (last edited 1 year ago)

Yeah, this was my assumption (the probe should hit before) - I just wasn’t sure if they were supposed to offset just enough with the adjustable probe to end up being in-line with the nozzle. The instructions are… not great.

Also - sorry, when you say leveling.. do you mean that I should be leveling the bed against the ABL sensor or the hot end?