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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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The full stable release of UltiMaker Cura 5.4 is here and it makes it easier than ever to remove brims and supports from your finished prints. UltiMaker S series users can also look forward to print profiles for our newest UltiMaker PET CF composite material!
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gr5 2,070
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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