Space
RRCRat Rig Community [Unofficial]
•Created by Space on 11/26/2024 in #ratos-support
Rapido 2 UHF Clogging. Updated heatbreak and thermistor
Part of the issue from the stock rapido 2 uhf seems to be a faulty pt1000. The stock thermistor looks like a small brass screw at the end of the thermistor wire and it screws in to the side of the heatblock. To see it you'll have to take the silicone off. Look at the phaetus website and take a look at the rapido 2 vs the rapido 2 plus (upgraded one) and you'll see the difference. The other part of the problem is that on the stock rapido 2, there seems to be some heatcreep past the heat block, causing the plastic to melt where it shouldn't melt, and then solidifying when it's cooled back down, causing intermittent clogs. The upgraded one seems to have a better heartbreak that is supposed to stop this issue.
Regarding the infrared image, I have only taken an IR pic of the nozzle itself with silicone sock still on the rest of the hot end so I can't compare. The nozzle always seems to be a bit below the actual temperature setpoint just from ambient cooling. The only way to really know is to do some temperature tests prints 10-15c higher than normal and see if that prints better.
22 replies
RRCRat Rig Community [Unofficial]
•Created by Space on 11/26/2024 in #ratos-support
Rapido 2 UHF Clogging. Updated heatbreak and thermistor
Thanks for the reply, that makes sense. I will contact them.
22 replies
RRCRat Rig Community [Unofficial]
•Created by Space on 11/26/2024 in #ratos-support
Rapido 2 UHF Clogging. Updated heatbreak and thermistor
Thanks for the reply. Did they send out the same exact hotend or did they send the one with the upgraded one? This is the upgrade for the standard Rapido 2 UHF https://west3d.com/products/phaetus-rapido-2-heat-block-replacement-for-rapido-2-hot-ends?_pos=7&_sid=4a92c6ec8&_ss=r
22 replies
RRCRat Rig Community [Unofficial]
•Created by Space on 11/26/2024 in #ratos-support
Rapido 2 UHF Clogging. Updated heatbreak and thermistor
Hey, update on the new dragon ace. i got it all together now. Works perfectly with the spacer and their meltzone extender. Had to get some new screws for the mount with the spacer like you mentioned. (M2.5x10mm 90deg tapered for anyone else reading.). Only problem with the hotend i got is that the temp probe and heater are on oposite sides, so i had to route the temp probe wire around the front. I will be working on modifying the toolhead stl to print a version with a slot on the right side to pass the wire through. I will also make the center bore slightly bigger since this hotend is a bit beefier. Performance is similar to original, time will tell if the clogs are fixed. Did a quick max vol flow test with esun HS PLA at 220deg, fans at 75% and got a perfect test up to 40 mm cu/s. with the included nozzle (0.4mm and looks like plated brass with hardened steel insert).. the ceramic heater is slightly physically larger on this one also, should work great for high temp filaments.
22 replies
RRCRat Rig Community [Unofficial]
•Created by Space on 11/26/2024 in #ratos-support
Rapido 2 UHF Clogging. Updated heatbreak and thermistor
Just FYI I ended up going with the triangle labs dragon ace for now. It seems to be the best of all worlds. Gonna experiment with it, the included spacer and their melt zone extender to get the correct height. It is on sale right now for around 60usd. Shipping time is pretty long but I think I can limp this rapido 2 for now.
22 replies
RRCRat Rig Community [Unofficial]
•Created by Space on 11/26/2024 in #ratos-support
Rapido 2 UHF Clogging. Updated heatbreak and thermistor
I looked at the triangle labs rapido ace, it looks like a better hotend all around. If i dont get the updated parts warrantied through ratrig or phaetus ill probably end up going with that.
22 replies
RRCRat Rig Community [Unofficial]
•Created by Space on 11/26/2024 in #ratos-support
Rapido 2 UHF Clogging. Updated heatbreak and thermistor
You're right about it being a bit too narrow. Both the capricorn and the included tubing leave a bit of a lip, so ill be putting a chamfer on it next time i disassemble it like you suggested. That should make the loading a bit smoother.
22 replies
RRCRat Rig Community [Unofficial]
•Created by Space on 11/26/2024 in #ratos-support
Rapido 2 UHF Clogging. Updated heatbreak and thermistor
The PTFE tube was the first thing I suspected so I replaced it with capricorn tubing. I adjusted it with a bit of preload and without a bit of preload on the heatbreak and neither helped. Thats before I figured out that the clogs are happening at the heatbreak itself below the ptfe from heatcreep. It is deforming the filament too far up the heatbreak and when doing unloads it leaves cooled deformed filament behind, causing the clog. Supposedly the updated heatbreak has titanium there instead of stainless for better insulation. The thermistor is the same PT1000, the new one being slide in vs screw in making it much easier to replace. Take this with a grain of salt as i could be completely wrong.
22 replies
RRCRat Rig Community [Unofficial]
•Created by Space on 11/26/2024 in #ratos-support
Rapido 2 UHF Clogging. Updated heatbreak and thermistor
I will. I have been having to print PETG at unusual but not uncommon temperatures. 250-260c +. The clogs don't usually happen mid print, only after a few load/unloads. I was removing the rapido 2 at first to unclog but now I am shoving a metal rod that come with a different printer through the top. I dont expect this to keep working for long since its not completley cleaning the heatbreak.
22 replies