There is no reason to re-invent the wheel. Both the Marlin and Repetier firmware have already been developed to run a Delta printer, and both can be easily tailored to work on just about any Delta-type printer.
Although I am far from a guru with these products, Marlin seems to be more popular but Repetier has a neat web configuration program that makes building your first installation easier than Marlin.
Here are links to Repetier's web configuration program and documentation:
http://www.repetier.com/firmware/v091/
http://www.repetier.com/documentation/repetier-firmware/
The result of the web configuration program will be an Arduino software package that is ready to install into your Arduino Mega, just from answering a few pages of questions about your printer and controller hardware. If you want to change anything or study the program to see how it works, the source code is included in the download. It doesn't get much easier than this.....
Although I am far from a guru with these products, Marlin seems to be more popular but Repetier has a neat web configuration program that makes building your first installation easier than Marlin.
Here are links to Repetier's web configuration program and documentation:
http://www.repetier.com/firmware/v091/
http://www.repetier.com/documentation/repetier-firmware/
The result of the web configuration program will be an Arduino software package that is ready to install into your Arduino Mega, just from answering a few pages of questions about your printer and controller hardware. If you want to change anything or study the program to see how it works, the source code is included in the download. It doesn't get much easier than this.....
