First 5 filament print- Success and failure
We’ll, it printed…
Does anyone else get the heads ’drolling offthe front of the sheet?
I moved the purge tower to the middle, thinking that would help. Maybe not. The issue seems to the the little rice sized bits that form on the nozzles- but mainly the 1st and 5th nozzles due to them coming all the way forward to calibrate on each level. That little bit of plastic cools, and then drags onto the top of the purge tower. This leads to unevenness which catches nozzle and jacks things up.
I also had issue with the USB drive failing. Luckily, just plugging and continuing worked. Needs to be fixed.
WAY better than the MMU2. Over 600 tool changes, and no issues there, just a bit of an issue with nozzle drool.
RE: First 5 filament print- Success and failure
Looks good. I just got a two color xyz calibration cube to print in TPU lol. I think if I back the temps down by like 2 deg it will be ok. TPU multi color print is never something that would have worked on MMU lol. So far I've been doing small stuff to get comfortable. if you do tpu, forget about feeding it through the filament sensor on the side... I had to bypass. The ninjaflex need some help at the extruder.
Some things that really make me wonder though. Why do the priming lines print off the edge of the printing plate!? same with unloading filament, it does it at the back of the plate and the filament falls off the back lol oh well. I might design something to lift the filament sensor away from the frame slightly so the bearings can be given a little more play.
So far I'm not regretting getting the thing.
RE: First 5 filament print- Success and failure
I agree with both the huge improvement over mmu and also the tpu feeding challenge. To get it through the sensor i had to remove the pfte from the side sensor push a piece of pla from the "back" to lift the ball on the sensor and feed the tpu normally by slowing retrieving pla and advancing tpu. I didnt have to completely unscrew the festo on top of the nextruder just remove the pfte. It took a while to crawl through the long pfte though. But they could do something with the side sensor at least. Im sure that is something that Prusa also noticed. I'm planning on getting an enclosure at some point and im not sure how practical it will be playing around just to feed tpu with that in place.
As far as the usb a lot of people have the same problem, including me after i flashed the firmware to 5Alpha. Its a known bug. For me PLA as support on PETG is the real deal breaker for the time being. It comes off so easily and leaves a "clean" surface, You just have to assign only one specific type of filament for the wipe towet perimeters which i agree has some problems with small blobs causing crash detections.
When this machine "finishes" with proper IS, multiple size nozzles on a print, bugs free and with a decent enclosure it could be what distinguishes PRusa from others.
RE: First 5 filament print- Success and failure
I also see the extruders priming off the front of the plate, what is that? Not priming very well.
Thanks for the insights on flex.
RE: First 5 filament print- Success and failure
Here are some three material prints. I think the only tweaks were:
10mm brim on purge tower
Purge to infill enabled- but it still makes a tower?
Infill before perimeters
Lowered white temp (the worst gooober-er) to 202C
Changed from Satin to smooth sheet.
These are printing pretty well. I'm happy with them. The XL is WORLDS better than anything I ever got out of the MMU2. The changing of the heads has worked well. It is noisey, but hey, that's the price you pay- the clacking of the locking mechanism is the loudest part, though it is fun to watch.
Looking forward to this weekend when I'll try PLA-PETG-Nylon-PC-Flex combinations.
RE: First 5 filament print- Success and failure
- Would fusing a short piece of PLA to the end of the TPU aid in feeding the TPU?
RE: First 5 filament print- Success and failure
No I don't think so. The actual problem I've found lies in the drag the filament sensors mounted on the sides of the printer create. take one of your tubes out and slide a piece of flex(I've tried ninjaflex(85A) and sainsmart(92A)) and the amount drag the ball bearing puts on the filament is crazy. My 5h was fully assembled so I don't think it's an error on my part. you can unscrew the filament sensor from printer and slide the electronic bit with the ball bearings a little and obstruct the path less but you can't really mount it back that way. Plus I've not done any testing on how much you can loosen the thing and still have the filament sensor be effective. I think for TPU it's going to just be matter of bypassing the filament sensor for the tpu filament. That's what I've done in a couple tpu prints now and it works fine.
Try this yourself
I was able to get a TPU + PLA support + Aquasys 120 soluble interfaces to work just now
- Would fusing a short piece of PLA to the end of the TPU aid in feeding the TPU?
RE: First 5 filament print- Success and failure
Can finally use this spool up that I bought thinking I could use in the MMU lol
RE: First 5 filament print- Success and failure
Cross my fingers, I’ve been getting good 2 and 3 color prints lately. Some usb cord winder/keepers and a self designed playing car holder.
The playing card holder was a two color and I used the setting above but with out a priming tower- and it worked fine. My thought is that as long as you infill first and you have large enough parts to handle any oddness on potential goobers on starting infill, the priming tower isn’t needed, and is actually a threat to the print.
To me, getting multicolor PLA prints was the minimum requirement. Multimaterial with high performance- PC/PA filled with CF with an ASA exterior with maybe some flex components