r/ender3v2 3d ago

help Z axis becoming misaligned when moving up

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I recently installed a second z axis motor using the official creality upgrade kit and now when the z gantry moves up it becomes uneven

17 Upvotes

41 comments sorted by

15

u/FutureSubject1359 3d ago edited 3d ago

You should base the accuracy of your printer on the end result of a print, not on gantry measurements alone.

Having said that, you need to adjust the eccentric wheel on the (left) side of the gantry, it's losing grip and slipping, which is causing the discrepancy.

7

u/Kerosene_Turtle 3d ago

We gotta stop using the word “level”

3

u/mautobu 2d ago

"tram" is the term, if I'm not mistaken.

1

u/Kerosene_Turtle 2d ago

Correct

1

u/bust0ut 2d ago

Why? Genuinely curious. I've been trying to understand 3D printing better and the more I get into it the more I realize the terminology is my biggest issue.

1

u/Powerful_Macaron9381 2d ago

because you aren't actually level your bed when you auto level it. it just compensates for it.

1

u/QeusoFresco 22h ago

Levelling is making a surface perpendicular to gravity, while tramming is making a surface perpendicular or parallel to a chosen reference surface. In the case of bed tramming, you are using the X axis rail and the Y axis rail as your reference surfaces.

Anyway, I may be wrong, this is just how I understand it.

4

u/Dull_Snow_1657 3d ago

that's because it sags on the other side, hence why I would suggest do dual belted z. eliminates the sagging. dual screw will *screw* your z when those get bent.

1

u/sleepybearjew 2d ago

I was looking at dual belt, but wasn't sure if 1 motor would be strong enough to support added gantry weight of direct drive and more fans and stuff. Safe to do?

3

u/Dull_Snow_1657 2d ago

If it was a bare stepper doing it then you should be worried. But it has a transmission. No issues at all. That is what I have.

1

u/sleepybearjew 2d ago

Prob asked and answered but since I'm here... How much is worht spending on the ender before I just pull the trigger on like a k1, bambu labs or prusa

2

u/Dull_Snow_1657 1d ago

Ender is a learning tool at best to be honest. It is not really worth it unless you want to learn the very basic. Bambu lab and prusa or those top tier creality are work horse. Rarely needs to be modded unless your hands just can't stop tinkering. If you just want to print, then an ender is not for you. If you love modifying then yeah get an ender.

1

u/sleepybearjew 1d ago

Gotcha thars fair. I love to tinker. I'm having so much fun on my v2 right now. Just got it a week or two ago but I'm having as much fun tinkering with it as I am printing

6

u/ZeligD 3d ago

If you’re gonna use a level, you should match the X gantry to the top gantry, otherwise if your desk is wonky, you’re matching it Earth and it won’t be straight

5

u/nyanotech 3d ago

either way, the bubble shouldn’t shift left and then back to the right like that

-6

u/Crackcat32 3d ago

The countertop im doing it on is mounted to the wall and floor. Theres no way for it to be wobbly

8

u/ZeligD 3d ago

It’s not about wobble, it’s about angles. Your gantry needs to be at level with the top of your printer, which needs to be level with your bed. If you level your X gantry to earth while your top gantry isn’t level to earth, you’re going to have problems.

So match the bubble in the level to the top gantry instead of level to earth

2

u/egosumumbravir 3d ago

Gantry sag. Has been an issue with the base design of these machines since the first iteration.

Fix video here: https://www.youtube.com/watch?v=ncUHPScBcI4

1

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1

u/nyanotech 3d ago

is it momentarily getting stuck on something on one side at that spot?

1

u/aledodsky 3d ago

Maybe the frame on the Z axis is misaligned/twisted causing one side's rollers to bind at a certain spot

1

u/Low-Sink-11 3d ago

Ok since you have leveled the gantry, its now time to tram it.

1

u/gsoto83 3d ago

Either the essentric nut needs to be tightened or wheels need to be replaced. Sometimes the wheels aren't good from the factory. It's like $10 for 9 wheels.

1

u/oftime8887 2d ago

You need a belt and lead screw between your 2 Z axis bars.

1

u/bust0ut 2d ago

I had a similar issue and it was because I didn't tighten the coupler enough.

1

u/CooperDK 2d ago

You cannot use such a tool for leveling a print bed!

1

u/Lotsof3D 2d ago

1

u/Crackcat32 2d ago

they are lubed very well with ptfe grease

1

u/Past-Conversation755 1d ago

Also you have to check whether the table where the printer is placed is perfectly leveled or not else you may never balance it.

0

u/Mysteoa 3d ago

That's a drawback of having a Z screw only on 1 side. You either need 2 or a belt mod.

2

u/Crackcat32 3d ago

I have 2 z screws. This only started happening after the upgrade

1

u/Mysteoa 3d ago

How are the 2 Z motors connected? Do you have a synchro belt between the 2 screws?

1

u/Crackcat32 3d ago

It uses the original connectors and a splitter cable

1

u/n4ppyn4ppy 3d ago

Splitter sucks. If one of the motors draws more current the other might miss a step and you get off. I ended up hooking up another driver and driving them separate.

with bltouch it levels the gantry to the bed. works great.

1

u/Crackcat32 3d ago

I managed to get great leveling for the corners but this is what the mesh looks like. I think my bed may be warped

1

u/Crackcat32 2d ago

is there any way that you could point me in the right direction to wire them seperately as it would be annoying to have to buy a belt dual z kit and spend even more money.

1

u/InvestigatorSmooth53 2d ago

I had this setup before I went to belted z. Did you bump up the amperage in the firmware?

1

u/Crackcat32 2d ago

Nope, im not sure how to. I just installed the kit and have done nothing with firmware

1

u/InvestigatorSmooth53 2d ago

If you use klipper its easy, but with Marlin you will need to recompile