Rapido UHG clog
I would like to clarify on the configuration regarding the hotends.
On RatOS 2.0 there was basically only one Rapido config for everything. The only thing I had to change was the thermistor type to PT1000.
Now the RatOS 2.1. Has 2 options, HF and UHF. The UHF by default has PT1000 thermistor. So everything checks out. I have the uhf version with pt1000 thermistor.
I should mention, that really rapido UHF is basically rapido 2, meaning the heater is rectangular and not round and it has an option to screw in an additional piece that makes the hotend a bit longer.
And here we have the option to choose either to go with the adaptor or without.
I do not have the adapter installed, so theoretically my UHF rapido is HF is terms of length of the heating element.
All fine and dandy, but for the first time in half a year - clogged after 1 print. I noticed that the filament unload macro is different now, it pushes the filament several times inside before fully unloading.
So an obvious question, does it matter in terms of the macros whether I have the adaptor or not on the Rapido UHF.
Should I choose the HF option if I don't have an adaptor Installed and choose the pt1000 thermistor somehow or is it the new unload procedure that could make the hotend clog?
14 Replies
You're conflating a bunch of things here:
Rapido 1 / Rapido 2 = hotend name, 1 has a circular heater, 2 has a rectangular heater
HF = no extension
UHF = extension nut
Plus = PT1000
These follow the Phaetus package naming, except you're free as a user to not use the UHF nut on a UHF hotend, in which case you've effectively downgraded your UHF to a HF and should pick that in the configurator instead.
It's important you choose the right one or the macro's won't move the filament the right length at the right speeds.
MVP. I did not yet print out the fan duct, so good to know on when to configure for the uhf!
@miklschmidt Well, the macro for the UHF it seems is incorrect. I installed the adapter and it clogged right away.
Nope, I was quick to judge. It was clogged, but not at the hotend and heartbreak part. It was clogged in the extruder
Tis was in the extruder right below the gears
Check the distance between the gears and the metal tube. The distance should be as short as possible...
Well I kinda checked. It all falls in line with what it needs to look like. I cut a fresh ptfe tube a little bit better and I will see. It should.not be hardware related, as this occurred with the RatOS 2.1.
I have some free time where I do.not.need to print stuff actively, so I'm kinda beta testing the new system
It should.not be hardware related, as this occurred with the RatOS 2.1.If you think it's the software, could you maybe point to what about the software would cause this problem? There's no general issue. So it's something specific to your machine.
I am still experimenting and waiting for this to happen again to reconstruct the situation.
It could be something with the macro, but until this happens again and I document the situation, I can only tell that something is off.
I have Rapido2 UHF with CHT(-ish) nozzle and after install RatOS v2.1 I've got it clogged almost the first use of
UNLOAD_FILAMENT default macro. Which was probably my first clog after few years (it's so long I don't remember when it happened last time).
So far I'm trying prolonged RETRACT_LENGTH=22* in _UNLOAD_UHF_CHT macro since in v2.0 I've had similar mod too, and now I'm waiting whether it happens again. As well as you :-).
(I have no idea whether the longer "RETRACT_LENGTH" for UHF is the solution)
*) Default length is 18, which is the same in all _UNLOAD_(SF|HF|UHF)(_CHT)? macrosRenew the PTFE tube in the print head and make sure that the PTFE is slightly longer.
The PTFE needs to get minimally pressed in when you reinstall the extruder.
That always happens if the PTFE is a bit too short.
AFAIK there will be coming an update in the installation guide.
1) I have PTFE a bit longer (Orbiter slightly presses on it, just to ensure there's no gap)
2) It worked flawlesly with RatOS v2.0 whole the time (well, with slightly modified macro since even there I've had a bit longer retract length). The only change is the UNLOAD_FILAMENT macro
The guy installed ratos 2.1. not changed the toolhead. The ptfe tube whilst is a possible problem, but def not in this guy's case. It may be my case, but it will be over a month till i get the new ptfe to install and check.
Well i had a couple of clogs after. One very nasty, but due to wood filement. It all comes down to extruder not pushing enough material out before doing those retractions back and forward and final retract. I must say, this new macro makes the tip so much better, but it also makes the tip sometimes a bit bigger, so even it clogs the extruder, so that it can not be released: A: without shifting the knob to make gears further apart B: dissasembling the xtruder. As i was about to install back ratos 2.0 macro someone sent me in discord, my printer got spooked and does not clog at this time, even though i have not changed a single thing. It has been several days and each and every filament swap i do is good. The furthest i went was A option of shifting gears 10 minutes ago. It is still some kind of magic.
I've had not exactly ideal tips too. So the change didn't help much. It sometimes creates this:
(new PTFE between extruder and hotend, just for sure, didn't help either)
Hey this one. Yes!
I get blobs of filament right above the heating zone which gets stuck but the last move it seems is enough for me to break that string apart
And the only way to take it out is from the nozzle side, poking a hez wrench heating the material from underneath
And I got another clog in the morning