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dherrendoerfer / The-Bad-Robin-3D-Printer

Home of the Open Source 'Bad Robin' 3D Printer
GNU General Public License v2.0
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Parametric design #1

Open sam-d opened 3 years ago

sam-d commented 3 years ago

The readme states that the design is parametric. Could you please provide more information on the design constraints?

I would like to know how the length of the rails in each axis affect the print volume. Also why is the design with 250mm rails considered minimal? Is there any contraint that would preclude using smaller rails?

I am looking to build a printer with a 215x215mm bed size and perhaps restrain the Z axis to 100mm as I rarely print tall pieces. What dimensions of extrusions and rails would I need?

dherrendoerfer commented 3 years ago

Hello,

The design does not require any changes in the 3D prints no matter what size you use for the rails. (between 250 and 450mm) The parts themselves are not parametric. The limit of 250mm rails only refers to its ability to print all the parts for another Bad Robin, you can of course also go smaller, in fact it's not even required for the height. 250mm rails on X and Y axis give you a useable print area of 155x160mm. On the Z axis it's about 170mm (with room to spare)

The rails and extrusions are for 250mm, add the same amount you add for the rail to the extrusion, add half of the Y change to the drill hole positions on the base extrusion.