Carbon fiber under carriage

[RogerL]

Hi,

I bought a filabase kit 400x400 print bed for my Blackwidow Cartesian printer 400x250.

The new bed is a heavy duty bed and it maybe would better fit for a core XY but the blackwidow is what I have to work with.

Now to the question..
I need to make a complete new undercarriage and it will be supported by two linear rails.

The print bed is heavy so acceleration will need to go down and a new undercarriage should be as light as possible.

As I see it I have two options, aluminum plate or carbon fiber. In both cases I see that a plate should be cut with profile/holes to reduce weight.

Will 6 millimeter carbon sheet be as rigid as a 6 mm aluminum sheet or will it flex more...?

[Thalios]

6mm CF twill weave is overkill in my opinion.

5mm is more than enough. I'm quite certain that 4mm would be enough.

I'm using 1.5mm G10 on a 300x300 custom made bed with a aluminium bracing underneath and it works fine.

[Veti]

just in case here is a light weight one (aluminium)
https://www.aliexpress.com/item/4000514697270.html

[RogerL]

@Veti I seen that one, its too small because of the pre-drilled holes of the buildplate. Thanks though for the effort to help.

[RogerL]

@Thalios ok thats good feedback, I have no idea so your input is helpfull. May I ask if you have a have a homogeneous board or a weight adjusted one? If you can post a picture it helps.

[Thalios]

Actual bed is 330mm. Print area 300x300. It is the Wanhao bed.