VC4 500 Comissioning mesh

Hey guys, I'm trying to follow the comissioning steps but my mesh looks absolutely horrible.

I've never seen a bow in this direction so I'm not quite sure what to do from here - I've tried getting the frame more square to get the corners up, but that didn't help the bow.
Additionally I've tried to reinstall the x linear rail just in case I fucked that up - but no matter what I do I get this extreme bow. If I hover on one of those points its a difference of 0.288mm.

Does anyone have a suggestion for this?

archen•11/7/24, 5:15 PM

Pull the gantry upwards by hand

archen•11/7/24, 5:16 PM

Your x gantry is bowing and that also makes your back corners low.. Once you get the gantry straight you will have a good mesh

archen•11/7/24, 5:17 PM

Just pull in the middle with some force. If you pull too much, just push it back down. Expect some force is needed

Aarchen Just pull in the middle with some force. If you pull too much, just push it bac...

KyreusOP•11/7/24, 6:13 PM

Thanks for the tip

KyreusOP•11/7/24, 6:13 PM

https://img.kyreus.dev/O7OrQohrM9

KyreusOP•11/7/24, 6:14 PM

it definitely got better, but I'm already pulling up very hard and this is the best it gets

archen•11/7/24, 6:15 PM

When you mounted the rail, did you tighten the screws evenly from one side to the other?

archen•11/7/24, 6:15 PM

It's important you screw them one by one from one side to the other

KyreusOP•11/7/24, 6:16 PM

Yes, i started from the left and went to the right - I can unscrew it one more time and screw them back in just in case - give me a few minutes

archen•11/7/24, 6:17 PM

It's also important that you torque them evenly. Ideally with a torquewrench

Aarchen It's also important that you torque them evenly. Ideally with a torquewrench

KyreusOP•11/7/24, 6:20 PM

What nm amount? Then I'll try that

KyreusOP•11/7/24, 6:23 PM

https://img.kyreus.dev/bTBAY1HpCr

KyreusOP•11/7/24, 6:24 PM

seems to not get better with rescrewing it

archen•11/7/24, 6:49 PM

Something is not right. Did you run Z tilt after adjusting?

archen•11/7/24, 6:50 PM

Your gantry is still bending a lot

archen•11/7/24, 6:50 PM

1Nm

Aarchen Something is not right. Did you run Z tilt after adjusting?

KyreusOP•11/7/24, 7:53 PM

yeah I always run z tilt before meshing

KyreusOP•11/7/24, 7:55 PM

https://img.kyreus.dev/LXWbXtSM9i

KyreusOP•11/7/24, 7:55 PM

do you still think it's the gantry? I've turned the extrusion by 90 degrees same result

archen•11/7/24, 8:05 PM

Something is wrong with your Z tilt

KyreusOP•11/7/24, 8:11 PM

KyreusOP•11/7/24, 8:11 PM

For me it looks like it's a bed issue tbh

KyreusOP•11/7/24, 8:12 PM

That's what I held against it

dickpoop•11/22/24, 1:49 PM

@Kyreus did you ever figure this out? I have an almost identical mesh on my 500

Ddickpoop @Kyreus did you ever figure this out? I have an almost identical mesh on my 500

KyreusOP•11/22/24, 1:58 PM

Well - I have a replacement bed which arrived today - I won't be able to test it on the weekend tho, but I'll update you

KKyreus Well - I have a replacement bed which arrived today - I won't be able to test it...

dickpoop•11/22/24, 1:58 PM

Did RR swap it out for you or did you have to buy a new one?

Ddickpoop Did RR swap it out for you or did you have to buy a new one?

KyreusOP•11/22/24, 1:58 PM

they swapped it out

dickpoop•11/22/24, 1:59 PM

Awesome, I'd really appreciate an update whenever you get a chance to swap them out

KyreusOP•11/22/24, 3:38 PM

@dickpoop I just switched out the beds and I'm pretty sure it was a bed issue - but hard to tell since my new bed is even worse xD

KyreusOP•11/22/24, 3:38 PM

I reran the mesh right before switching bed, this was the before:

KyreusOP•11/22/24, 3:38 PM

https://img.kyreus.dev/rvFpknUftX

KyreusOP•11/22/24, 3:40 PM

and now it looks like this:

KyreusOP•11/22/24, 3:40 PM

https://img.kyreus.dev/0JBQ68tE5l

dickpoop•11/22/24, 3:48 PM

Holy shit

KyreusOP•11/22/24, 3:49 PM

I'm fucking pissed - I have to pay for every shipment the fucking import taxes - the've sent me the first bed seperatly because it wasn't available while they shipped the rest of the printer - so already two times the import tax - now I got another bed - again I have to pay the import taxes - and now what? They send me another one and I have to pay again?

KyreusOP•11/22/24, 3:49 PM

fucking shit show right now

dickpoop•11/22/24, 3:50 PM

What does the bed look like? Seems like a warp that bad would be easily visibly noticeable

KyreusOP•11/22/24, 3:51 PM

Do I have to say anything?

rn_image_picker_lib_temp_69dc009c-f187-4fba-9f62-c18b99f2a7f2.jpg

dickpoop•11/22/24, 4:41 PM

Oof

Papalorian•11/24/24, 12:39 AM

I just finished my VC500 and my mesh looks like it has a transmission tunnel running down the middle from front to back. I checked my bed before installing and it was flat. That really sucks Kyreus, hope they make it right.

PPapalorian I just finished my VC500 and my mesh looks like it has a transmission tunnel run...

KyreusOP•11/24/24, 8:25 AM

So you have a bed mesh even with a flat bed?

Papalorian•11/27/24, 6:44 PM

Yeah my bed was flat, I checked it from every direction and corner to corner with a machinists straight edge and it was flat. I have come to the conclusion that the 2020 extrusion is too flimsy for the 500 size. My extrusion was also flat and straight before installing, but after getting the belts adjusted correctly, there is deflection. I did end up pulling up the middle pretty hard and got rid of most of the transmission tunnel. I have spent days on this mesh and I finally got it down to .246 variance, but it still looks terrible far as I am concerned.

PPapalorian Yeah my bed was flat, I checked it from every direction and corner to corner wit...

KyreusOP•11/27/24, 7:27 PM

well for the 500 you want a variance of about 0.25 and I think you are just below that aren't you?

KyreusOP•11/27/24, 7:28 PM

Glad you got your extrusion fixed - I'll have to pull it up more too - but last time I pulled very hard and i'm kind of scared of breaking everything :KEKW:

right now i'm waiting on bed number 3 so lets see

Papalorian•11/27/24, 7:44 PM

Yeah I am just below but I still think it's ugly for all the work I did. I really think the 500 needs a stronger X extrusion. Those belts exert some serious force once tightened and you know how much easier it is to flex something that is long rather than short. i bet that extrusion is deflecting variably during motion not to mention the general sag in the middle.

Papalorian•11/27/24, 7:46 PM

I read a post on another thread they were ordering a titanium rod to reinforce the extrusion. Not a bad idea except for the expense of titanium and all the work of tearing it back apart to install.

Papalorian•11/27/24, 7:47 PM

I wouldn't pull on your extrusion unless you can see an obvious low spot with your staight edge. I could see light in the middle on mine, which is why I finally did that.

Papalorian•11/27/24, 7:49 PM

it was not like that until the belts were adjusted, I checked it with the same straight edge.

Papalorian•11/27/24, 7:58 PM

This mesh was with bed at 70 and hotend at 150, and I let it heat soak for about 30 mins. The mesh looks way worse at room temp.