problema con la stampante 3d

[jonny]

ho recentemente acquistato una stampante tronxy x3 

però ci sono due problemi principali

1- all' avvio la temperatura dell' estrusore sale fino a darmi l' errore MAXTEMP, anche impostando dallo schermo lcd della stampante una temperatura qualsiasi, l' estrusore la supera raggiungendo il limite e dando l' errore (qui il sensore di temperatura dell' estrusore la rilevava)

2-se la connetto al computer (qui invece il sensore ha smesso di funzionare)  con repetier host, mi dà l' errore " No start signal detected - forcing start" (utilizzando la banda 250000); invece se uso la 115200 mi dà:

20:15:09.986 : OpenGL version:1.1.0
20:15:09.986 : OpenGL extensions:GL_WIN_swap_hint GL_EXT_bgra GL_EXT_paletted_texture
20:15:09.986 : OpenGL renderer:GDI Generic
20:15:09.986 : Fast VBOs for rendering not supported. Using slower default method.
20:15:21.263 : No start signal detected - forcing start
20:15:23.592 : Printer reset detected - initalizing
20:15:23.607 : start
20:15:23.607 : echo:PowerUp
20:15:23.607 : External Reset
20:15:23.607 : Brown out Reset
20:15:23.607 : Marlin1.0.0
20:15:23.607 : echo: Last Updated: Apr  6 2017 20:19:33 | Author: (none, default config)
20:15:23.607 : Compiled: Apr  6 2017
20:15:23.607 : echo: Free Memory: 11889  PlannerBufferBytes: 1232
20:15:23.607 : echo:Stored settings retrieved
20:15:23.935 : Error:0
20:15:23.935 : : Extruder switched off. MINTEMP triggered !
20:15:23.967 : Error:Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)
20:15:25.920 : echo:SD init fail
20:15:25.982 : FIRMWARE_NAME:Marlin V1; Sprinter/grbl mashup for gen6 FIRMWARE_URL:https://github.com/ErikZalm/Marlin/ PROTOCOL_VERSION:1.0 MACHINE_TYPE:X3A_8 EXTRUDER_COUNT:1 UUID:00000000-0000-0000-0000-000000000000
20:15:26.014 : X:0.00 Y:0.00 Z:0.00 E:0.00 Count X: 0.00 Y:0.00 Z:0.00
20:15:26.014 : echo:Active Extruder: 0
20:15:26.014 : Begin file list
20:15:26.014 : End file list
20:15:26.014 : Error:checksum mismatch, Last Line: 1
20:15:26.014 : Resend: 2
20:15:26.045 : Error:Line Number is not Last Line Number+1, Last Line: 1
20:15:26.045 : Resend: 2
20:15:26.061 : FIRMWARE_NAME:Marlin V1; Sprinter/grbl mashup for gen6 FIRMWARE_URL:https://github.com/ErikZalm/Marlin/ PROTOCOL_VERSION:1.0 MACHINE_TYPE:X3A_8 EXTRUDER_COUNT:1 UUID:00000000-0000-0000-0000-000000000000
20:15:26.076 : X:0.00 Y:0.00 Z:0.00 E:0.00 Count X: 0.00 Y:0.00 Z:0.00
20:15:26.076 : echo:Active Extruder: 0
20:15:26.076 : Begin file list
20:15:26.076 : End file list
20:15:26.076 : Error:checksum mismatch, Last Line: 11
20:15:26.076 : Resend: 12
20:15:26.107 : echo:Active Extruder: 0
20:15:26.107 : echo:Active Extruder: 0

 

la domanda è, centra tutto col sensore di temperatura rotto oppure c'è anche qualcos'altro?