Did you install the jumpers under each of the step motors? This one drove me nuts on my Xi3 (nothing in the images/documents about it). ...bby Bishop - Prusa i3 and variants
I updated mine with the firmware from Repetier: . There is a wizard that walks you through it, but it might help to save off your eeprom (internal config settings) before you try to replace it. If they gave you the source code for your original then even better as you have a fall back to start over. The only problem with their software is that now you have to make a donation to download (which iby Bishop - Prusa i3 and variants
Recently I've been printing larger width items (like 70mm x 100mm) and started getting the edges lifting/warping off the heatbed. I use the blue painter's tape, but also heat the bed to 60 degrees. The PLA I use recommends between 210-230 so I stick to ~210. This was not a problem before but I have changed a couple of things in my printing practice and rather than wasting 20+ layers to find out tby Bishop - Prusa i3 and variants
I bought a XI3 off Aliexpress and just finished assembling it after a week. I had to dremmel out the nut holes in the acrylic as they were too thin. The instructions were basically off the wiki but the included photos and videos. Wires for the motors didn't match any source references. Wasted a lot of time until I learned about the jumpers under the motor drivers. Having problems with the absolutby Bishop - General
I just built an xi3 also and spent too much time with non-moving motors on "fast move". Did you set the jumpers under the motor drivers of the RAMPS shield card on the Arduino? That was an undocumented step. ...bby Bishop - Prusa i3 and variants