WANHAO D9/300 printer call for free upgrading. HD

Wanhao D9 produced before July 27th 2018 has issue of inter-board(splitter board). We design the board with mos chip which may get burn and lose function that the Z axis can only move up. We changed it to Tertiary tube to have 5A more buffer. The upgrading pack is FREE and available from all distributors and WANHAO CHINA. FOR MORE INFORMATION CHECK: WWW.WANHAO3DPRINTER.COM-- PRODUCTS CATALOGUE--D9