<p>I have had a Creality Ender 3 v2 with a 4.2.2 motherboard for about 2 years. It's a company-owned machine but I got it just about when Covid hit so it has only been used at home. It worked OK at first. I used it a good bit. Then I got a Prusa and liked it better so I mostly used it for both work and personal stuff.</p>
<p>Now Covid work-from-home is over and I have moved my Ender 3 back to my office. I also installed a BLTouch I bought a long time ago but never got around to installing it. I had a devil of a time getting the BLTouch to work. It would quit halfway through leveling. I ended up installing Jyers firmware with a 3x3 leveling grid and now it prints. Kewl!</p>
<p>Now I have an issue where none of the dimensions on my prints are correct. I am printing a housing for a circuit board so the dimensions have to be correct or the circuit board will not fit. X, Y, and Z are all undersized. Worse yet, the first 3 or 4 mm in the Z-axis layers are squished. It's like elephant's foot on steroids. I attached a photo.</p>
<p>So the X and Y dimensions of the print are oversized at the bottom due to the elephant's foot but are undersized at the top. The Z-axis dimension is way undersized because of the squish.</p>
<p>The Jyers firmware has a &quot;steps/mm&quot; setting. I haven't changed it from default. Creality's specs say the printer is capable of 0.1 mm resolution but it doesn't say steps/mm so I have no idea whether default settings are correct in Jyers firmware. Jyers was developed specifically for the Ender 3 v2 so I would expect it to be right.</p>
<p>I checked all the rollers on all axes and they look fine. I checked the coupler on the Z-axis stepper and it is tight. I can't find anything loose. The rails are clean and no foreign matter is present. The belts are tight.</p>
<p>I am printing with Hatchbox PLA. I have always had success with this stuff on my Prusa.</p>
<p>I compared the default PLA temps for Creality vs. Prusa. The Prusa runs the extruder at 220 °C vs the Creality running at 215 °C. I am using PrusaSlicer for the Creality.</p>
<p>A related issue I am having is the supports. When I print with supports on the Prusa the supports break off easily. I can usually break them off with just my fingers. The same supports on the Ender 3 v2 require pliers. The support material is binding to the model too tightly. The elephant's foot would explain why supports on the lower layers would be wonky but even supports at higher layers are hard to remove.</p>
<p>I replaced the nozzle with a new 0.4 mm unit hoping this might help. No improvement.</p>
<p>Any ideas?</p>
<p><a href="https://i.sstatic.net/vOQyP.jpg" rel="nofollow noreferrer" title="Photo of a 3D printed model with the lower layers larger than the upper layers"><img src="https://i.sstatic.net/vOQyP.jpg" alt="Photo of a 3D printed model with the lower layers larger than the upper layers" title="Photo of a 3D printed model with the lower layers larger than the upper layers" /></a></p>

CC BY-SA 4.0
2023-02-25T04:19:38.623Z
I think the first important question is: have you calibrated the printer in all 3 axes? Also, please break up the post into only one question; create a separate question about the supports.
agarza
CC BY-SA 4.0
2023-02-25T08:37:15.540Z
What is the temperature of the bed? P.S. your corners are bulging a lot, i guess you have more issues than dimensional problems. What print speeds do you use?
0scar
CC BY-SA 4.0
2023-02-27T22:51:19.453Z
Bed temp is 60C.

I tweaked the slicer 1st layer and printed a calibration cube. The elephant foot is greatly reduced. The corners are still bulging. The X and Y dimensions are a little undersized but almost correct. The Z axis is better but still a bit short.
Chuck
CC BY-SA 4.0
2023-02-27T22:53:47.697Z
I mentioned the support issue in the same posting because I think it is related. It looks like the squished Z axis is causing the support material to be fused to model such that they do not break off cleanly.
Chuck
CC BY-SA 4.0
2023-03-07T14:58:56.720Z
I punted. This BLTouch consumed about 2 weeks of on and off troubleshooting. It was more trouble than it was worth. Not only was it unreliable but the print quality was pathetic using Jyers firmware and default settings. The layer lines are clearly visible in the photo above. 

I disconnected the BLTouch, reconnected Z-axis switch, and restored factory firmware. Reliability and print quality has improved dramatically. I have had only one print failure since and the layer lines are almost invisible. Elephant foot is controlled by using 2 pieces of paper to measure nozzle tip height.
Chuck
<creality-ender-3><jyers>
Creality Ender 3 V2 Printed objects incorrect dimensions
Chuck
# Creality Ender 3 V2 Printed objects incorrect dimensions

(Asked by: username_0 on 2023-02-25)

I have had a Creality Ender 3 v2 with a 4.2.2 motherboard for about 2 years. It's a company-owned machine but I got it just about when Covid hit so it has only been used at home. It worked OK at first. I used it a good bit. Then I got a Prusa and liked it better so I mostly used it for both work and personal stuff.

Now Covid work-from-home is over and I have moved my Ender 3 back to my office. I also installed a BLTouch I bought a long time ago but never got around to installing it. I had a devil of a time getting the BLTouch to work. It would quit halfway through leveling. I ended up installing Jyers firmware with a 3x3 leveling grid and now it prints. Kewl!

Now I have an issue where none of the dimensions on my prints are correct. I am printing a housing for a circuit board so the dimensions have to be correct or the circuit board will not fit. X, Y, and Z are all undersized. Worse yet, the first 3 or 4 mm in the Z-axis layers are squished. It's like elephant's foot on steroids. I attached a photo.

So the X and Y dimensions of the print are oversized at the bottom due to the elephant's foot but are undersized at the top. The Z-axis dimension is way undersized because of the squish.

The Jyers firmware has a "steps/mm" setting. I haven't changed it from default. Creality's specs say the printer is capable of 0.1 mm resolution but it doesn't say steps/mm so I have no idea whether default settings are correct in Jyers firmware. Jyers was developed specifically for the Ender 3 v2 so I would expect it to be right.

I checked all the rollers on all axes and they look fine. I checked the coupler on the Z-axis stepper and it is tight. I can't find anything loose. The rails are clean and no foreign matter is present. The belts are tight.

I am printing with Hatchbox PLA. I have always had success with this stuff on my Prusa.

I compared the default PLA temps for Creality vs. Prusa. The Prusa runs the extruder at 220 °C vs the Creality running at 215 °C. I am using PrusaSlicer for the Creality.

A related issue I am having is the supports. When I print with supports on the Prusa the supports break off easily. I can usually break them off with just my fingers. The same supports on the Ender 3 v2 require pliers. The support material is binding to the model too tightly. The elephant's foot would explain why supports on the lower layers would be wonky but even supports at higher layers are hard to remove.

I replaced the nozzle with a new 0.4 mm unit hoping this might help. No improvement.

Any ideas?

[![Photo of a 3D printed model with the lower layers larger than the upper layers](https://i.sstatic.net/vOQyP.jpg "Photo of a 3D printed model with the lower layers larger than the upper layers")](https://i.sstatic.net/vOQyP.jpg "Photo of a 3D printed model with the lower layers larger than the upper layers")

**Tags:** creality-ender-3, jyers
> **Comments:**
> **username_1**: I think the first important question is: have you calibrated the printer in all 3 axes? Also, please break up the post into only one question; create a separate question about the supports.  
> **username_2**: What is the temperature of the bed? P.S. your corners are bulging a lot, i guess you have more issues than dimensional problems. What print speeds do you use?  
> **username_0**: Bed temp is 60C.  I tweaked the slicer 1st layer and printed a calibration cube. The elephant foot is greatly reduced. The corners are still bulging. The X and Y dimensions are a little undersized but almost correct. The Z axis is better but still a bit short.  
> **username_0**: I mentioned the support issue in the same posting because I think it is related. It looks like the squished Z axis is causing the support material to be fused to model such that they do not break off cleanly.  
> **username_0**: I punted. This BLTouch consumed about 2 weeks of on and off troubleshooting. It was more trouble than it was worth. Not only was it unreliable but the print quality was pathetic using Jyers firmware and default settings. The layer lines are clearly visible in the photo above.   I disconnected the BLTouch, reconnected Z-axis switch, and restored factory firmware. Reliability and print quality has improved dramatically. I have had only one print failure since and the layer lines are almost invisible. Elephant foot is controlled by using 2 pieces of paper to measure nozzle tip height.  

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## 0 answers

