Topic: Aluminum vs Glass Heated Bed
I see that some high end 3D print manufacturers are using an aluminum plate bed.
I cant fathom why.
It cant be expense. Aluminum has to be cut and milled. Glass only cut.
Aluminum does conduct heat quicker than glass, but takes longer to cool.
That may be a problem waiting for the print to pop off.
Aluminum thermal expansion is greater.
A 200mm bed will expand 0.20" from 68F-100C. Glass about .003"
Does that affect a print ?
Flatness- I would bet to guess an average flatness of good aluminum bed is about .003"-.004"
While my Borosilicate glass bed is less than .001"
The OEM DAV glass cracked 3mos after purchase and was concave in the middle.
The new Boro glass seems stronger, harder to scratch and prints come off easier.
Scratch resistance - Manufacturers claim that the Al bed is clear anodized.
My experience, Type2 clear is clear, Type1 clear turns grayish.
Type2 will eventually scratch, Type1 is considered "hard coat". Military uses Type1.
Also, aluminum is more prone to gouging when using a razor for cleaning , lifting.
Anyone using aluminum can give advantages Im missing ?
Repetier FW 0.92, Solidify3D