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Ian, I just read your last blog post, about the Diamond 'full' color. Very impressive feedback!
About using more perimeters to allow the purge, you could also try to print infill first, so you have plenty of filament length to do that purge, so 2 perimeters should work. Except for the last 2 layers of each top surface where you need to purge outside of the print (I already made the system you
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fma
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General
I'll send you a private message in a couple of hours...
Thanks.
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fma
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For Sale
Thanks for the feedback! I was monitoring you blog for that
What about trying water cooling? A simple solution would be to use a little silicone tube wrapped around the base of the heatsinks... There won't be a good thermal contact, but it may help. A copper maidenhair would be better, but you will need a powerfull pump...
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fma
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General
The temperature was 200°C. What puzzle me is I made, a few days ago, a spacial support, to have the heatsink free, and I had issues with retract. Here, all was fine.
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fma
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General
This week-end I printed a small part, and at the end of the print, I just realized that the E3D Lite6 fan was unplugged!
But the part printed without problem, without stringing or so. The PLA mount didn't suffer. Go figure...
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fma
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General
I proposed 100€ to rshane, so the same for you.
But I first need to know if rshane is still interested... If he is not, I can sell it to you.
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fma
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For Sale
I already built the printer, with the vertical design. All the rods and linear bearings are from an old Stratasys, and are very good (16mm rods, INA auto-centering bearings...).
Why a single guide is better? I guess it can suffer from the same issues, depending of the quality... And position of belts can have the same effects...
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fma
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CoreXY Machines
Same price as USA : 24€.
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fma
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For Sale
And with an horizontal design, with belts in the same plane, is it better to have them close together, fixed at the center on each side of the carriage, or to move them apart, each belt close to the rod?
With belts at the center, they won't induce twist on the carriage even if there is a mis-tensioning. On the other hand, the carriage will more able to twist under vibrations...
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fma
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CoreXY Machines
Yes, it works fine. I will give you the shipping cost.
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fma
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For Sale
I dig this old post, which never had an answer.
My current CoreXY design uses a vertical X axis config:
but I'm thinking to switch to an horizontal config:
(Righ now, the vertical carriage only uses 2 linear balls bearings, because I was missing the 2 others. I now bough them, so I can re-design it.)
I'm wondering which config has the better rigidity when the carriage is shaking during pr
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fma
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CoreXY Machines
Quotefrankvdh
Various people have been working on ink-based colouring systems for quite a while, I think mostly focused on inkjet technology. A soon-to-be-released example is
Interesting!
I also found this:
[3dprint.com]
QuoteGetting back closer to the Diamond approach, I wonder about an "asymmetric" hot-end. Have one large (e.g. 3mm?) base-colour filament, and several smaller (1.75mm? or ma
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fma
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General
Thanks for the precisions about Diamond 5...
That's said, I'm still not convinced what you guys are explaining about the heatsink keeping the PTFE cold. The Lite6 heatsink is heated up by the heatblock. Right? The fan tends to keep it not too much hot, so it does not itself heat up the PTFE (so the filament). Am I still right?
But the base of the heatsink is much more hot that the ambiant air.
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fma
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General
I guess they keep their technology away from public eyes
What is very strange is the very long path in the heater block. On the other hand, the fan blows directly on the filament, just before it enters in the tube. So the cold/hot transition is not that long.
I tried this solution (without the curve), but I think my stainless steel tube was not smooth enough inside, and I had a lot of friction
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fma
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General
So, you advice to tighten the idler wheel after tensioning? Or can I let it free to turn?
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fma
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CoreXY Machines
I used for years a GRRF hotend using a PEEK heatsink (with PTFE, pretty close to the Lite6 design), without any active cooling. It was a problem to mount it, because the PEEK got very hot, but it was working fine. I had no issue (but I was not in a Bowden config).
About the E3D clip, I'm talking about this:
With such clip, the PTFE would not be heated up on a too long path...
BTW, have you e
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fma
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General
I made some tests yesterday: not an epic fail, but not an epic success neither. The problem is the length of the metal pushfit I'm using: it maintains the PTFE hot on a too long distance. So, retractation sucks, as it was mentioned.
I'm waiting for new connectors ('à olive', in french. Union?), but I'm not sure they will be better. Best would be something similar to E3D system, but with metal cl
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fma
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General
You mean the PTFE? I cut it so the belts can't touch each other. If it was shorter, it would be the case.
But this is a very flexible sheet (1mm thick), so it follows the belts, and not the opposite. The only point where it can't move is inside the holding part.
I think it could be possible to maintain it in a better way, so it is totally free and does not act on the belts at all. I'm thinking
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fma
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CoreXY Machines
Not sure to understand what you mean... The PTFE is maintained in its middle by the purple hanger, and positioned at the exact blet crossing; and the belts themselves keep it twisted.
The PTFE is flexible enough even at the fixating point so it does not push the belts.
Even if the belts where deflected, as they are always in the same position, this should have no influence on the carriage? Am I
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fma
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CoreXY Machines
SydneyDesigner, I implemented your suggestion:
The 'V' on the left auto-blocks the belts, and the part where it is engaged is used to put tension on the belts. It allows a good tension within a small space. I printed a prototype, and it works great.
As I used a single plane config, I cut a part in a PTFE sheet to put between the belts where they cross, which avoids friction:
Here is how th
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fma
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CoreXY Machines
I just made this:
Stainless steel screws, alu heatsink... I should receive my metal pushfits on tuesday.
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fma
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General
Arrgl, the test failed. Not because of the hotend itself, but because of the PLA mount. This mount prevents the natural air flow I had when I tested the hotend in the air, so now, the top of the hotend becomes too hot for the PLA... I could print with some filament having a higher Tg, but I think it is better to build a new heater block, as I suggested, to address the 2 problems: mount temp. and
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fma
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Quotejinxthe E3D team came up with the V6 lite to counteract the influx of clones on the market, and to give us budget builders/PLA users an affordable option for a genuine e3d hotend.
Yes, true.
QuoteFMA what was the test print ? was there a lot of retraction and at what speed, am just thinking that if fila allowed to heat up through the tube then the fila becomes elastic resulting in a slug
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fma
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General
QuotefrankvdhThe conservative part of me says that all the Reprappers who have gone before believed that they needed the heatsink -- they wouldn't have put it on otherwise. The other part of me says that maybe they were all wrong.
The E3Dv6 came first. This design, which can reach high temp, does need the heatsink, to cool down the heatbreak, and keep the PTFE cool. Then came the Lite6. My feeli
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fma
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