Budaschnozzle troubles

Hi guys, I bought a Budaschnozzle, but am getting these jams now all the time where there is a molten part in the hotend that becomes too wide and jams inside somehow. I am not sure if this is the cause. I am printing with ABS.

Should I mount a fan with a funnel on it so that it cools the top part of the hotend that goes onto the extruder? Are there known heat travel problems with the Budaschnozzle?

I am using the 1.2 variant from G3D. Printing at 240º degrees celsius.
Haven't had these problems with my previous hotend.

Is it 'normal' for a Buda to need cooling?

Would this help?
[www.thingiverse.com]



- Marinus

Edited 2 time(s). Last edit at 05/12/2013 05:45AM by Ohmarinus.

I believe the G3D variant is particularly bad but even the lulzbot buddaschnozzle requires some air flowing over the heatsink to reliably print PLA.

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My blog [3dprinterhell.blogspot.com]

I also have trouble now with the layers adhering to eachother, i have recalibrated the E-steps/mm but still no change. I am starting to wonder if i am using the right thermistor table (#1 in Marlin).

I now print with the buda set to 240° but I have the feeling it's not getting hot enough, therefor I am doubting if I am using the right thermistor table.

Printing at 230º seems to work, I am mostly now having transport issues and the filament seems to jam a lot. I am trying with all my best effort to print a fan-duct so I can cool down my extruder/hotend top part, but it's very hard, currently mounted the cooler against the extruder, so the extruder is kept cool, but the top of the hotend still gets too hot

Edited 1 time(s). Last edit at 05/11/2013 07:10AM by Ohmarinus.

Are you printing PLA or ABS.
You should check the temperature with a thermocouple on a meter.
If you are printing PLA, you're printing very hot which will make jamming more common.
You can get away with just pointing a house fan or spare case fan at the print, it really doesn't take a lot of cooling, but you need to heat the nozzle inside the airstream.
Again the fan thing only applies to PLA.

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My blog [3dprinterhell.blogspot.com]

I had to add a fan anyway, I am printing in ABS, only problem left now is that the ABS warps up from the printbed, it is driving me crazy, with the old hotend it all worked flawlessly, but now with a new hotend I get warping like hell...

No idea why, I haven't changed anything on the heatbed settings. Maybe a different printing temperature will help making the warping less...?

I used this fan duct to cool the copper part of the hotend:
[www.thingiverse.com]

Works like a charm!




I am currently printing on Kapton tape, and I have NO idea why the hell my prints don't want to stick to the Kapton anymore.. I have turned up the heatbed temperature to 115º and turned up the printing temp from 230 to 237.. It still doesn't work.

It worked fine before.



Polygonhell Wrote:
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> Are you printing PLA or ABS.
> You should check the temperature with a
> thermocouple on a meter.
> If you are printing PLA, you're printing very hot
> which will make jamming more common.
> You can get away with just pointing a house fan or
> spare case fan at the print, it really doesn't
> take a lot of cooling, but you need to heat the
> nozzle inside the airstream.
> Again the fan thing only applies to PLA.

Edited 1 time(s). Last edit at 05/11/2013 04:12PM by Ohmarinus.

The LulzBot Buda 2.0 doesn't require any active cooling for PLA, even if it is just sitting there in the nozzle.

Anyway, I'm printing with ABS. And I now have adherence problems with the bed...

I have the problem you previously said with jamming issues with the Buddaschnozzle G3D version. Although when it does get started i find it sticks rather well.
Im using a heated PCB bed, 3mm layer of glass directly on top and spraying that every so often with Hair spray, sticks very well!!

Meanwhile I've bought different ABS, from another supplier, and it works like magic!

Currently have printed all the parts for my 2nd printer: MendelMax 1.5! and building it now. This will probably become the printer with which I will print PLA parts, but I am not sure yet. Will start with ABS, because it is a known substance for me.

Thanks for the advice, I have heard about it more here. For me Kapton is already enough

I have the Lulzbot AO-101 and the Budapest 2.0 nozzle and I have had no problems with the filament sticking to the bed. I use the PET and lulz juice and sometimes it sticks too well. I mainly print in ABS but I have printed 2.2# worth of PLA also without troubles. What I have found is that height from the bed and brand of filament, and extruder temp are the most important factors. Not all filament requires the same temp and some colors need less or more heat.