My hot end suddenly stops heating and decouples
Hi there.
i have this issue very rare..
prints suddenly 3/4 way (layer 186 for example) stop printing. the error message is.
11:44:41.918 : OpenGL version:3.1.0 - Build 8.15.10.2559
11:44:41.918 : OpenGL extensions:GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_blend_color GL_EXT_abgr GL_EXT_texture3D GL_EXT_clip_volume_hint GL_EXT_compiled_vertex_array GL_SGIS_texture_edge_clamp GL_SGIS_generate_mipmap GL_EXT_draw_range_elements GL_SGIS_texture_lod GL_EXT_rescale_normal GL_EXT_packed_pixels GL_EXT_texture_edge_clamp GL_EXT_separate_specular_color GL_ARB_multitexture GL_EXT_texture_env_combine GL_EXT_bgra GL_EXT_blend_func_separate GL_EXT_secondary_color GL_EXT_fog_coord GL_EXT_texture_env_add GL_ARB_texture_cube_map GL_ARB_transpose_matrix GL_ARB_texture_env_add GL_IBM_texture_mirrored_repeat GL_EXT_multi_draw_arrays GL_NV_blend_square GL_ARB_texture_compression GL_3DFX_texture_compression_FXT1 GL_EXT_texture_filter_anisotropic GL_ARB_texture_border_clamp GL_ARB_point_parameters GL_ARB_texture_env_combine GL_ARB_texture_env_dot3 GL_ARB_texture_env_crossbar GL_EXT_texture_compression_s3tc GL_ARB_shadow GL_ARB_window_pos GL_EXT_shadow_funcs GL_EXT_stencil_wrap GL_ARB_vertex_program GL_EXT_texture_rectangle GL_ARB_fragment_program GL_EXT_stencil_two_side GL_ATI_separate_stencil GL_ARB_vertex_buffer_object GL_EXT_texture_lod_bias GL_ARB_occlusion_query GL_ARB_fragment_shader GL_ARB_shader_objects GL_ARB_shading_language_100 GL_ARB_texture_non_power_of_two GL_ARB_vertex_shader GL_NV_texgen_reflection GL_ARB_point_sprite GL_ARB_fragment_program_shadow GL_EXT_blend_equation_separate GL_ARB_depth_texture GL_ARB_texture_rectangle GL_ARB_draw_buffers GL_ARB_color_buffer_float GL_ARB_half_float_pixel GL_ARB_texture_float GL_ARB_pixel_buffer_object GL_EXT_framebuffer_object GL_ARB_draw_instanced GL_ARB_half_float_vertex GL_EXT_draw_buffers2 GL_WIN_swap_hint GL_EXT_texture_sRGB GL_ARB_multisample GL_EXT_packed_float GL_EXT_texture_shared_exponent GL_ARB_texture_rg GL_ARB_texture_compression_rgtc GL_NV_conditional_render GL_EXT_texture_swizzle GL_ARB_sync GL_ARB_framebuffer_sRGB GL_EXT_packed_depth_stencil GL_ARB_depth_buffer_float GL_EXT_transform_feedback GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_ARB_framebuffer_object GL_EXT_texture_array GL_EXT_texture_integer GL_ARB_map_buffer_range GL_EXT_texture_snorm GL_INTEL_performance_queries GL_ARB_copy_buffer GL_ARB_sampler_objects GL_NV_primitive_restart GL_ARB_seamless_cube_map GL_ARB_uniform_buffer_object GL_ARB_depth_clamp GL_ARB_vertex_array_bgra GL_ARB_draw_elements_base_vertex GL_ARB_fragment_coord_conventions GL_EXT_gpu_program_parameters GL_ARB_compatibility GL_ARB_vertex_array_object
11:44:41.918 : OpenGL renderer:Intel(R) HD Graphics Family
11:44:41.918 : Using fast VBOs for rendering is possible
11:44:48.657 : Printer reset detected - initalizing
11:44:48.673 : start
11:44:48.673 : Info:Autoleveling enabled
11:44:48.673 : Transformation matrix: 0.999991 0.000000 -0.004240 0.000007 0.999999 0.001718 0.004240 -0.001719 0.999989
11:44:54.273 : zDistortionCorrection:1
11:44:54.289 : Free RAM:976
11:44:54.289 : Autoretract:0
11:44:54.289 : X:0.00 Y:0.00 Z:0.000 E:0.0000
11:44:54.289 : SelectExtruder:0
11:44:54.305 : FIRMWARE_NAME:Repetier_0.92.9 FIRMWARE_URL:https://github.com/repetier/Repetier-Firmware/ PROTOCOL_VERSION:1.0 MACHINE_TYPE:Delta EXTRUDER_COUNT:1 REPETIER_PROTOCOL:3
11:44:54.305 : Printed filament:222.05m Printing time:2 days 21 hours 25 min
11:44:54.305 : PrinterMode:FFF
11:44:54.398 : X:0.00 Y:0.00 Z:0.000 E:0.0000
11:44:54.398 : DebugLevel:6
11:44:54.414 : SelectExtruder:0
11:44:54.414 : Begin file list
11:44:54.414 : End file list
11:44:54.414 : Info:Autoleveling disabled
11:44:54.960 : SelectExtruder:0
11:44:54.960 : X:0.00 Y:0.00 Z:480.200 E:0.0000
11:44:54.975 : Info:Autoleveling enabled
11:44:54.975 : DebugLevel:6
11:44:55.303 : SelectExtruder:0
12:01:00.788 : DebugLevel:14
12:01:00.794 : Error:One heater seems decoupled from thermistor - disabling all for safety!
12:01:00.797 : Error:Temp. raised to slow. Rise = -39.55 after 36042 ms
12:01:00.797 : Disabling all heaters due to detected sensor defect.
12:01:00.797 : DebugLevel:14
the termistor reads temp perfectly even after decouple i can see temp drop as normal..
after reset even if i leave just hot end on at 230 degrees without a job it stays perfect then suddenly heating cartridge goes off and decouples..
any ideas??
thanks gas!
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