LATEST VERSION IS V3.1.0 - CHANGE TO THE 3.1.0 BRANCH IN GITHUB
Those that have build a clone prusa i3 MK2 (perhaps a dolly, or similar) that have bought one of the now available clone MK42 beds might be interested in running stock prusa firmware.
The original firmware is setup for the mini rambo- ramps uses different pins and doesn’t have digipots for stepper current. That means that the “quiet mode” vs “power mode” won’t work at all.
I’ve put the work in to port v3.0.11 over so that it works with standard RAMPS pinout. That means it works with RAMPS and other hardware that copies RAMPS like MKS BASE, MKS GEN etc.
The MKS boards are a better bet because they have an extra output mosfet which is used to drive the extruder fan; if you use a real RAMPS you’ll have to just hardwire that to the supply.
Get the firmware from https://github.com/slippyr4/Prusa-Firmware
Clone the repository, open it in arduino ide and upload the sketch to your prusa clone. If you’ve built your clone properly and have a MK42 it should pass calibration ok.
I shall aim to keep it up to date - the latest prusa firmware is an RC that merely adds support for the multi material upgrade which I don’t have, so i’ve not merged those changes yet. I’ll wait for a non-RC release.