Basic Information: Printer Model: Ender 3 MCU / Printerboard: Mini SKR v1.2 klippy.log https://termbin.com/pi1z Describe your issue: I want to fix the dimensional accuracy of my printer. Right now, it’s not accurate at all. On Marlin you do this with esteps, but when i google for it i find …

I’m trying to fix the standard issue of slight inaccuracy. With marlin you need to fix the steps/mm on every ender style printer due to inaccuracy. You calibrate XYZ just like you calibrate the extruder. After reading through the entire thread twice, it seems that the final solution there is “sorry …

First of all, don’t measure your printout, because that can shrink and ooze and bulge and whatnot. Instead measure your gantry/printhead directly. E.g., like so: make sure your toolhead is at least 100 mm from the left add a clamp to the X-axis so that it touches the printhead from the UI move th…

What is the magnitude of the inaccuracy that you’re seeing? The Ender 3 will have some X/Y inaccuracies due to how the belts are implemented (ie they’re not always parallel) and the inaccuracies are not linear and will change with the position of the gantry and print bed. For example, when the gan…

[image] marcus-in-3d: Now, if this still is off by a multiplier then ignore ReXT3D ’s claim to “NEVER change X/Y, A/B, Z, etc. rotation_distance”, because that’s in fact exactly what you should do, because you have measured the very mechanical properties he’s talking about and they’re off. Whi…

My solution to the Creality X belt routing geometry issue, in this case applied on my CR-10S Pro. It works like a charm, although it adds a bit of additional flex to the system as the belt tension is compressing up to three layers of the belt. But I have not seen any practical artifacts associated…

[image] Sineos: […] mechanical imperfections […] Yes, this is all true. And you are absolutely correct. However, if you have a consistent error, and you have whatever tools you have, then measuring the hardware (preferably, as you correctly pointed out, at multiple points, and then averaging …

[image] mykepredko: The Ender 3 will have some X/Y inaccuracies due to how the belts are implemented (ie they’re not always parallel) and the inaccuracies are not linear and will change with the position of the gantry and print bed. Wow! Really? How could anyone be so bad at hardware design t…

It’s an engineering trade off - the Ender 3 approach (and I doubt it was the first) was for economy and accepting that these errors wouldn’t be noticed or affect the user’s satisfaction with the printer. Surely that was corrected in the very first hardware revision upgrade and can’t possibly be in…

I can agree with a lot of what you have written, @marcus-in-3d Just for sake of clarity: Hardware influences rotation_distance is determined by the mechanical components, i.e. Pitch of the belt (not thickness) Teeth count / diameter of the pulleys Pitch / Start / Lead of a lead-screw Step angle …

Correct dimensional accuracy

General Discussion

Sineos January 21, 2023, 7:43pm 2

Check Dimensional accuracy problem for a lengthy discussion on this subject.

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Correct dimensional accuracy

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