阅读其他人的帖子,我也有和他们一样的问题,在尝试了所有的建议后,花了足够的钱在另一台打印机上更换挤出机几次,也更换了大量的喷嘴。我的打印机是Cetus3D扩展Mk II,带有加热床和GeckoTek Ez-Stick热表面。我通常使用0.4喷嘴,从来没有能够让0.2工作,当我用完0.4喷嘴时,我使用0.6喷嘴。最初我的打印机是防弹的,日复一日地打印得很好,任何品牌的灯丝,新的和旧的。它只是可靠地工作,但在过去的一年里,它可靠地堵塞,而不是迫使我更换喷嘴。我在我的机器上没有mod,除了一个电缆指南,以保持彩虹电缆在顶部丢失或捕捉在垂直轨道上,我只使用cetus软件v2.2.28.44在Windows 7 64bit上。无论如何,它通常打印良好,当清洗挤出机齿轮和新喷嘴安装和良好干燥的灯丝。有时如果打印很小,它会完成,但较大的打印或许多打印,它无法在打印过程中挤出,导致以下结果:
直到它停止挤压,打印是良好和干净的,没有变薄挤压或斑点/剪切等迹象。最初我认为这可能是灰尘或颗粒堵塞挤出机尖端,但我已经注意到过去几个月一个常规的“松饼顶部”塑料斑点在喷嘴轴的顶部,我通常不得不切断这一点,以删除喷嘴来替换它,并从齿轮上取下挤出机盖和清洁塑料刨花。请看下面的照片,松饼顶部的斑点就位:
下面是一张显示这个斑点的近距离照片,你可以很容易地看到齿形齿紧紧抓住灯丝,试图把它拉出来,在哪里它开始失败,只是在灯丝上磨光。这是我放在一边的其他喷嘴的典型情况。所以这个问题对我来说不是一次性的,而是一个持续的问题。我在想,在灯丝进入的喷嘴的钢部分的顶部,积聚了太多的热量,软化了灯丝,在它进入之前,导致它扣住,形成一个斑点,然后完全防止挤压。也可能是喷嘴内的熔融塑料没有被挤出足够快,在较长的打印过程中,它建立和溢出顶部导致堵塞斑点。这很难确定。我没有办法拍摄一个特写来展示发生了什么,加上我已经花了太多的时间来诊断这个问题
我的一些失败的喷嘴也有同样的问题,深色的灯丝是一个很好的碳纤维灯丝
我刚刚注意到的最后一个打印的拼图是一个气泡。在打印过程中,喷嘴末端有一个气泡,橡胶盖被扯掉了,但这可能会发生各种各样的问题。然而,看到下面的特写失败的打印的一个“泡”的灯丝,是在打印的时候,它失败了。在我看来,没有其他气泡,也没有明显的弦。这是一个复杂而庞大的模型,需要大量的支持杆。
实际上,当打印失败时,它通常是在挤压层中有很多空隙的地方,就像密集的大面积支撑或填充图案。如果它是一个平坦的固体层,打印通常是可靠的。但我不是一直打印立方体,需要有机模型打印和非常复杂的单件形状。< / p >
Plus even with the heated bed I need to use rafts to get good start layer adhesion but you can see here that is fine and it failed about 12mm up the support structures and none appear to have been bent over its all fairly solid. I do notice removing supports structures and raft especially can be difficult as they fuse to the model more than they should. I hope you can improve support building in your software and increase bottom layer thickness on models so they are stronger and dont delaminate as if they were the raft boundary. Direct printing to build surface without raft rarely works as it either doesnt lay a strong layer or starts to peel at a corner of the model, so I rely on rafts to get reliable prints and reduce waste.
I want to get back to the early days of my printer where I could put ANY PLA filament in and and model and it just printed perfectly on the default PLA setting for weeks on end non stop. I do a LOT of printing and the Cetus is my only printer I’ve been able to rely on. I also have a physical disability where my left arm doesnt work so constant adjustment and tweaking needed with other printers wont solve my need. The Cetus is pretty much perfect and I know it can work reliably but since mine no longer does with even well dried new filaments with a new extruder and nozzle.
考虑到以上所有情况,我想知道是否软件或固件设置我们无法调整,或者主板问题是问题的根源,如果它会再次出现在Mk III的轨道上,当它可用时。在这之前,它的质量和可靠性都非常好。我不知道它是什么时候开始的,也不知道是否有任何变化可能导致了它。我知道这可能不是一个足够好的解释来准确诊断问题并找到解决方案。打印机在我的客厅里,所以它周围有良好的清洁空气,没有宠物、孩子或吸烟者等,全年的环境温度相当舒适(没有空调)。< / p >
Steve
Btw, I’ve only once tried TPU rubber filament which was too soft to push through extruder and never used ABS. I’ve only used PLA and bought many brands from ebay as well as good quality local brands and its been very consistent with all of them. The cheapest ebay generic stuff works but strings and blobs often. Local brands have given me the best results in finish like X3D and Aurum. ESun I would rate about 40%, usuable but not great finish. And like I said at the start I go through a lot of new clean nozzles often, three this weekend just trying to get this one model printed, so you can appreciate how frustrating this has become. I dont want to give up on the cetus as I havent experienced another printer that can compete on reliability with minimal maintenance (important for me with only one arm).
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