I don't know if it worth the effort to do RAMPS conversion on mini w. The build volume is small and it don't have full enclosure. I'm little concerned about your research skill based on what you have done so far, but if you are interested regardless and confident enough, here is the link. (There are multiple another post for Da Vinci Jr. RAMPS conversion that is not for mini w.)
http://www.soliforum.com/topic/16288/ho … -ramps-14/
(Da Vinci 1.0, Jr. 1.0 RAMPS, miniMaker) X4, (Creality CR-10S, CR-10 mini, Ender-3) X4, Anycubic MEGA X4, Anycubic Chrion X1, ADMILAB Gantry X2 (MonoPrice Maker Select V2, Plus, Ultimate)X4--Select mini X1, Anycubic photon X4, Wanhao duplicate D7 X1.
iNSTONE Inventor Pro X2, CTC Dual X2, ANET-A8, Hictop 3DP-11, Solidoodle Press, FLSUN I3 2017X1