Capricorn PTFE Tubing XS- Low Friction
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I had a Groot printout working great with 3.1mm with only a few faint whisps of string until one of his arms broke for unrelated reasons (only 2 perimeter walls, low infill, and .35mm nozzle with .35mm line width, on a fairly thin arm, so it was pretty weak).
I did print out this geometric torture test thingy with it this morning. This was 3.2mm retraction, .35mm nozzle, .18mm layer height.
You can see a few very faint whisps of string. Given the challenge of printing this, I think that's pretty decent. With my normal PTFE tube I wouldn't have printed this with less than 4.5 or 4.6mm retraction. And this is with 1.71-1.72mm filament.
I haven't loaded the ASA filament again to try it out. It measures out at an even 1.75mm.
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Wow. This stuff is amazing. I'm running TPU through a 2 foot bowden tube pushed by a Titan extruder and no problems at all.
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I don't remember if these links have been posted on this forum. In case, you may find them usefull to calibrate retract with Bowden config:
https://airtripper.com/1320/airtripper-extruder-filament-force-sensor-announcement
https://airtripper.com/1338/airtripper-extruder-filament-force-sensor-introduction
https://airtripper.com/1473/airtripper-extruder-filament-force-sensor-design-3d-print
https://airtripper.com/1397/electronic-kitchen-scales-teardown-versus-load-cells
https://airtripper.com/1626/arduino-load-cell-circuit-sketch-for-calibration-testI will soon order this load cell:
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If you need/want more than a meter of it, you can find it cheaper directly from Capricorn. They have a few bundle options too that come with a cutter and stickers.
I JUST bought some generic PTFE off of Amazon Prime. While it seems to have made a nice improvement over my worn out tube, I kinda wish I had remembered about this Capricorn stuff.
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If you need/want more than a meter of it, you can find it cheaper directly from Capricorn. They have a few bundle options too that come with a cutter and stickers.
I JUST bought some generic PTFE off of Amazon Prime. While it seems to have made a nice improvement over my worn out tube, I kinda wish I had remembered about this Capricorn stuff.
I just ordered some direct from Capricorn, but based on the live Q&A Tom did with E3D they are about to become a UK reseller for it.
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I just ordered 2 meters of the XS (the dark blue 1.9 or 1.8 ID) Capricorn tubing. I will try to report back once I receive and install it.
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I've got both the XS and TL series. The supposedly smaller inner diameter of the XS series is actually slightly larger than the TL series, but I'm sure it's just a batch issue. Both the XS and TL tubing does have very high quality. Maybe because of my old PTFE tubing already has a small inner diameter, the optimal pressure advance value for me only lowered to 0.5 from 0.6.
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I've got both the XS and TL series. The supposedly smaller inner diameter of the XS series is actually slightly larger than the TL series, but I'm sure it's just a batch issue. Both the XS and TL tubing does have very high quality. Maybe because of my old PTFE tubing already has a small inner diameter, the optimal pressure advance value for me only lowered to 0.5 from 0.6.
What sort of hot end do you have, and how long is the Bowden tube? It's unusual to need as much pressure advance as 0.5 or 0.6 except when using mixing extruders.
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I've got both the XS and TL series. The supposedly smaller inner diameter of the XS series is actually slightly larger than the TL series, but I'm sure it's just a batch issue. Both the XS and TL tubing does have very high quality. Maybe because of my old PTFE tubing already has a small inner diameter, the optimal pressure advance value for me only lowered to 0.5 from 0.6.
What sort of hot end do you have, and how long is the Bowden tube? It's unusual to need as much pressure advance as 0.5 or 0.6 except when using mixing extruders.
I'm using it on a BCN3D sigma converted to duet wifi and 1.75mm e3d v6. The bowden tube is about 60cm. Maybe my way of finding out pressure advance value is wrong. I was doing a 20mm x 20mm tower in vase mode at 100mm/s speed. The problem on the corners resolves at a pressure advance value of 0.5.
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Thanks! That's a perfectly good way of finding a good pressure advance setting (but see the caveat below). The corners look quite bad with no pressure advance, but perhaps that's because you were printing quite fast, and pressure advance matters more at high printing speeds.
One thing to watch out for is that high pressure advance settings have the side effect of reducing acceleration unless the extruder jerk is set quite high, and the reduced acceleration may contribute towards the pressure advance "working".
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Thanks! That's a perfectly good way of finding a good pressure advance setting (but see the caveat below). The corners look quite bad with no pressure advance, but perhaps that's because you were printing quite fast, and pressure advance matters more at high printing speeds.
One thing to watch out for is that high pressure advance settings have the side effect of reducing acceleration unless the extruder jerk is set quite high, and the reduced acceleration may contribute towards the pressure advance "working".
Since pressure advance should work independent of speed, I purposely used a high speed for magnifying it's effect. I don't print at such high speed. My extruder acceleration is 5000mm/s and jerk is 10mm/s, whereas the X/Y acceleration is 2000mm/s and jerk is 8mm/s. I guess you are right, maybe the limited printing speed from pressure advance is contribute towards the pressure advance "working". I should re-run the test with lower X/Y jerk and higher E jerk.
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Has anybody found a UK supplier of Capricorn PTFE Tubing XS- Low Friction?
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E3D will be selling it soon.
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I bought a chunk of this when ordering my Smart Effector. I didn't measure before hand or even after cutting it to attach to my printer, but I have 150mm left of whatever the length was that I got. I am currently running some pieces at 5mm retraction (no pressure advance) and haven't seen a whiff of stringing.
Direct drive extruder flipped so the marks being left by the extruder gear are on the inside radius of the Bowden tube.
Lower retraction tests soon to come.
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E3D will be selling it soon.
Yes. I also noticed that they are including it with their "Gold Edition V6" https://e3d-online.com/v6-gold-hotend.
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Yeah E3D have it listed now in 100mm lengths. Can buy longer lengths if you increase the qty
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If anyone is planning on using the capricorn tube with a Bondtech you might want to consider using the bowden adapter rather than the built in adapter, On my bondtech the tube was frequently pushed out of the built-in bowden connector (which damages the tube) but on the adapter its perfect.
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If anyone is planning on using the capricorn tube with a Bondtech you might want to consider using the bowden adapter rather than the built in adapter, On my bondtech the tube was frequently pushed out of the built-in bowden connector (which damages the tube) but on the adapter its perfect.
I have a bondtech, can you show me what you mean?
I use this on the output end
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Another advantage of capricorn XS tube is it's rated to 340 deg c. I use it in an e3d lite6, no messing around with heat creep.
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You mean it can be used on a Lite6, and allows to reach same temperatures than the V6? That would be great!
