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Edited: Mar 12, 2022

Bed won't level

Hi All, so I am having an issue with my bed, it just isn’t flat, if I run ABL it shows that 1 side of my bed is 0.39 mm higher than the other which is a big deviation and is just making it in possible to print. I am not sure why its like this, has anyone had any similar issues? Is it the MIC 6 bed, do I have one Z stepper moving faster than the other? Is something warped? Any help would be great as currently I am out of ideas!

12 comments

12 Comments

David Ewen

May 09, 2022

I'm having bed leveling issues as well.

I purchased an assembled printer.

Almost 2mm from 0/0 to 0/300.

I have attempted to correct with spacers, but it won't work.

The values change, but the skew amount does not.

Has anyone had any communication with Makertech at all on any issue?

Peterg

Mar 17, 2022

@Dries Douterloigne wow, that is neat! I haven't seen that sorta thing outside of a Duet 3D board... If you do something with this, please share your findings! I would be very interested in this.

Dries Douterloigne

Mar 17, 2022

Just found out bigtreetech offers an expansion board that would work with the skr 2. And price is not that high https://www.biqu.equipment/products/btt-rrf-wifi-v1-0-module-driver-expansion-module-for-skr-v1-4-1-4-turbo-skr-v1-3-3d-printer-part

Dries Douterloigne

Mar 17, 2022

Would antibacklash nut help for this?

Johannes Weis

Mar 17, 2022

Replying to

@Dries Douterloigne it should help a little bit since it adds friction to the axis. This would lessen the chance of the bed falling but does nothing about the tilt.

An anti backlash nut isn’t necessary since the bed is too heavy anyways which means it’s at the bottom end of lead screw play.

Dries Douterloigne

Mar 17, 2022

Replying to

I'm playing with the idea of automatic bed tramming with an old skr mini e3 v1.2 board I have laying around or maybe something like a Huvud board to make the 2 z-axis independent. But I have never done something like that before and I don't know how to do that in Klipper (I know marlin has a routine for mcu with independent z-steppers). Or maybe people who don't use the DSH can use the extra extruder port.

Johannes Weis

Mar 17, 2022

Replying to

@Dries Douterloigne in Klipper you can use [z_tilt] to level the bed with independent steppers. Should be an easy addon with another stepper driver for direct drive setups.

Don’t have a clue about additional boards though. You could look/ask around in the Voron discord since they use auxilary boards for the quad gantry.

Peterg

Mar 13, 2022

Very cool build! Thanks for sharing your mod! I wasn't really sure what was happening until I looked at the pictures of the Make...

Does the height of the box affect how far down the bed can go? (I haven't finished building my PF3 yet...)

Johannes Weis

Mar 13, 2022

Replying to

@Peterg takes about 20mm from your absolute height. Haven‘t checked how much exactly :/

Akisame -

Mar 13, 2022

Replying to

@Johannes Weis Awesome!! Well done! The steppers can't even support the weight of the 24V bed. I'll be using this for my printer. My buildplate is already ruined due to a crash now but it will save my next buildplate...

Johannes Weis

Mar 12, 2022

I had 1.5mm deviation... And yes, the MIC-6 plays a huge role in that since the steppers can't support the weight when not powered. I designed a Z-axis synchronisation if you want to get rid of that issue :)

Until then you have to manually move one of the steppers to get it leveled or get another driver and run one of the z-steppers with the leftover extruder outlet on your mainboard. With that you could level the bed tilt but it'll cost you the ability to use the switching hotend.

https://www.prusaprinters.org/prints/149446-proforge-3-z-axis-synchronisation

Akisame -

Mar 17, 2022

Replying to

I don't have the MIC-6 bed and the stepper's are also unable to support the weight of that one as well.....Already had 1 collision with the bed as a consequence of this (damaging the bed as a result....)