@@ -11,7 +11,7 @@ With \#2 feeling somewhat unloved ('both overdesigned and underdesigned'), I'm b
While aluminum is my go-to for machine design, and is ostensibly possible to mill on a shopbot by a motivated user (see [jens](https://github.com/fellesverkstedet/fabricatable-machines/wiki/Fabricatable-axis)), there is some hesitation to use it.
| Material | Young's Modulus (GPA) | Cost for 6mm x 24x24" | Machinability |
| --- | ---: | ---: |
| --- | ---: | ---: | --- |
| ABS | 2 | 52 | Not Dimensionally Stable, but OK to Machine |
| Nylon 6 | 3 | 130 | Painful |
| HDPE | 1 | 23 | Easy |
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@@ -60,7 +60,7 @@ Because tooth geometry very sensitively affects linear-ness of drive, especially
I am curious about a belt-driven rack, similar to [this design](https://gitlab.cba.mit.edu/jakeread/rctgantries/tree/master/n17_linearPinion).
!TODO: compare by transmission ratios (abstract from motor) and cost of parts.
!TODO: belt spec for hight (huge) load belts: tooth shear, and stiffnesses.
!TODO: belt spec for hight (huge) load belts: tooth shear, and stiffnesses.
