The Kobra 3 V2’s print bed operates on 24 volts, but its lack of underside insulation results in noticeably slow heating times—taking over two minutes to reach 60°C from 20°C. This design may also lead to increased energy consumption to maintain the desired temperature during printing.
The printer uses a flexible, double-sided, coated spring steel sheet as its print surface. This sheet is covered with a textured PEI layer, offering excellent adhesion for the first layer and leaving a matte, professional-looking finish. Once printing is complete, the piece cools and can be easily removed by gently bending the plate.
During tests, the bond between the printed object and the plate was exceptionally strong. For models with large base areas, this caused significant issues: the cooling shrinkage forces of the plastic lifted the spring steel plate’s corners off its magnetic base, leading to problems like warping.
A solution was found using custom-made clips to secure the plate corners to the magnetic base. However, these clips pose a risk of damaging the thin coating over the heating elements, potentially causing short circuits.
