Please install the default firmware when reflashing the E3 or E4 CNC router by using the following batch files from the download.

• The default E3 CNC firmware will use the E3_flash.bat file.
• The default E4 CNC firmware will use the E4_flash bat file.

If you have modified your E3 or E4 CNC and added a X2 home switch in series with the Z home switch then you will want to reflash using the self squaring batch files.

Click the file to download: BobsCNC Flash Zip