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| Joules:
Pete, I had the same hot end and extruder assembly on my Createbot Mini. Yeah, a loose heat block, nozzle will drop the the nozzle pressure tremendously, leading to under extrusion. I Changed out the hot end for E3D components, but tightening what you have will be a good starter. That internal ptfe tube caused me lots of issues too. |
| Joules:
The above show an example of blockage I could suffer due to the ptfe failing. All the E3D parts can be machined, they provide the drawings to make them, but I like what they have done, so support them by buying the parts. I needed some beer tin shim for the existing heater cartridge to work. and sleeve the heat break tube to do away with the ptfe completely. Look at E3D's design, just leave a little more meat on the heat break tube than they do, as ours is an unknown material (should be stainless) and may not be as strong. |
| picclock:
Hi Pete49 Just a thought. Have you set the filament and nozzle size correctly in the slicer?. I am not sure which slicer you are using but some of them default to a 3mm filament size. I did this early on by mistake and ended up with very similar symptoms. As an aside, I have started using the Cura2.1 slicer, a beta version (bit buggy) and its extremely good with some very nice features. Will do a write up with pictures in my log soon. FWIW I normally use a 0.2mm layer height with a 0.4mm nozzle with very good results - see pictures on my project log. These are fairly std values to work with. IMHO reducing to 0.1mm layer height just makes prints take twice as long with no other benefits. Best Regards picclock |
| Pete49:
Well what an interesting day today. Its now printing as it should and it wasn't an error in the settings but I cleaned out the nozzle with a burn out. Once assembled I tried again and still the same problem but then thought I would check the 1 thing I hadn't ...the filament. As it was supplied with the machine I figured it was good but then as suggested I checked the filament and the first 5 metres of it was mostly undersize (1.70 with a few bits of 1.75 which the extruder would grip. That was why it was a thin feed :lol: I cut the dodgy stuff off and now all is as it should be. Many thanks Joules and all the guys that assisted. I learned a lot more good info and improved my knowledge of 3D printing so I can put it to good use and jailbreak the Da Vinci printer later on. Once again thank you all for the help. :mmr: :beer: Pete |
| Pete49:
Another problem has reared its head :Doh: I went to print a wheel with a 60mm dia. and after the first couple layers it went wonky and the next layer was about 10mm to the right while sitting in front of the machine so I stopped the print and retried it with the same result. I am now going to try it in the later version of Cura V15.04.5 and see what happens. WOW talk about offsets :lol: I see where I can make adjustments but not sure how to proceed. Any ideas? Pete |
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