Re: [DIYbio] Re: BioPrinter won 1st Prize in Instructables Design Competition!

On 03/01/2013 06:24 AM, Patrik D'haeseleer wrote:
> I think modifying an actual CD drive for polar printing onto a standard Petri dish would be very difficult.

He was pointing out that it is easy. The linear drive from the CDROM is one axis -- you locate it
from center to radius MaxR, then install a stepper motor with stout shaft under point called center,
then attache a petri dish holder to the stout shaft. Voila -- petri dish coordinates.

And if you have to
> engineer it from scratch anyway, putting together a square Cartesian system is no harder than doing a polar system.

X-Y seems harder than adding a disk to a stepper shaft to me...while alternatively polar coords simplifies your
code considerably for access to the full area of petri dishes.

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