heater sensor test

[Arturas 1]

Hi, 

 

Could someone tell e why its fails? Heat cartridge is broken?

Also what does mean delta T 20 degree? whats mean i should add 20 degree more on filament sensor ? 

 

Thanks 

[Arturas 1]

Also i notice 3D solex core is not working well as well. It start printing  all good, but after 30 min or more filament is blocked. Printer shows 200 degree but filament is not extruded. so i took print core from slot 2. swapped with slot 1. That original core is printing with same setting and same filament well. So what is wrong ? temp sensor or heat element in core?

I checked temp sensor ohm is about 110.