Energy defined braille dot Index dot forming process require a low number of moving parts. 13 solenoids are used In Basic-D/Everest and 39 in BrailleBox and FanFold-D. This can be compared with more than 500 moving parts in some of the eccentric based braille printers. With many moving parts the likelihood of mechanical failure will increase. The core technology of Index solenoids has been refined during many years. In October 2018 the New Generation Solenoids was introduced. The solenoid construction is very stable, the components with contact against the paper is made of hardened steel and will not wear out. In previous versions of solenoids including solenoids used by competitors the froming energy was reduced during heavy printing. With Index New Generation Solenoids the impact energy will remain on the same high level even during heavy printing. To evaluate the stability of the printing mechanism Index printers in high temperature has been tested in a sauna (60C) still producing high quality braille.