Richrap - Is this the Delta printer that you are controlling with a Reprapdiscount RUMBA board? I am trying to get my Delta printer running with the same board and have run into serious roadblocks trying to get the thing to work correctly. I have done everything I can think of within the firmware (I have tried Marlin as well as the Repetier version) to get things to work. I seem to have better luby chinto5 - Delta Machines