Here is a step by step how-to for preparing the Cohesion3D Mini microSD card with the correct firmware and configuration for 4 axis use. This is needed if you wish to run a rotary or rotary and z axis.
Step 2. Open the microSD card on your computer via microSD card reader/adapter
Step 3. Format the microSD card in the FAT file format
Step 4. Download the zxya firmware from here: C3D 4 Axis Firmware
Step 5. Download the 4 axis config file from here: C3D 4 Axis Config File
Step 6. Copy both files onto the microSD card in the root directory (no folders)
Step 7. Eject the microSD card from your computer and re-insert it into the C3D controller
Step 8. Power up the unit and test. You can use THIS ARTICLE to test it.
The official installation guide can be found here: