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If the rear fan doesn't spin you do get blocks mid-print or at the start of a newer print after things have cooled down.
The problem is almost always in the wiring just inside or above the print head. Remove the plastic netting (slide it up or cut the heatshrink off the end if necessary and slide it up) until you find the 3 white fan connectors. The two that are connected together with a short loop are for the side fans. The other one is the rear fan. Try jiggling that connector while the nozzle is at 70C (fan comes on around 50C). Consider just cutting those connectors off (with power off) and soldering the wires directly.
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Another Cura release has arrived and in this 5.8 beta release, the focus is on improving Z seams, as well as completing support for the full Method series of printers by introducing a profile for the UltiMaker Method.
We are happy to announce the next evolution in the UltiMaker 3D printer lineup: the UltiMaker Factor 4 industrial-grade 3D printer, designed to take manufacturing to new levels of efficiency and reliability. Factor 4 is an end-to-end 3D printing solution for light industrial applications
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gr5 2,210
If the rear fan doesn't spin you do get blocks mid-print or at the start of a newer print after things have cooled down.
The problem is almost always in the wiring just inside or above the print head. Remove the plastic netting (slide it up or cut the heatshrink off the end if necessary and slide it up) until you find the 3 white fan connectors. The two that are connected together with a short loop are for the side fans. The other one is the rear fan. Try jiggling that connector while the nozzle is at 70C (fan comes on around 50C). Consider just cutting those connectors off (with power off) and soldering the wires directly.
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