komodo

Hi, Sorry missed your reply. I had a little bit of success of CF, I used the Hardcore Nozzle for 3D Solex. We have now sold the UM3 as it just couldn't produce the quality of prints that we needed. We tried all sorts of retraction settings and just couldn't get clean prints. The support material used to drag and get caught on the print, and then obviously when you dissolve it you get an imperfection on the surface. The CF material also dragged and left bobbles on the print surface. Everything we tried with success on the UM2+ didn't work on the UM3, nothing else we tried worked either. We actually got much better results with the UM2+, the UM3 just wasn't for us. BR Rich

UM3 has been sold, but the UM2+ is still available! BR Rich

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Ah nooo!! sorry! Looking for £1200 for the UM2+ and £2200 for the UM3 both plus VAT if applicable. So around £600-700 off new and still in warranty. BR Rich

Few pictures of the UM2+, UM3 pictures coming! BR Rich

Great, thanks. We we are switching production methods and 4 printers is too many, so we need to sell a couple of them off. BR rich

Hi, I'm selling my UM2+ (545 print hours) and my UM3 (not sure how to find the hours on this one, but it's lower the the 2+). Both in excellent condition and come in original boxes with some filament. UM2+ comes with a 0.4mm Olsson Ruby and a standard 0.4mm nozzle. The 3 comes with an 0.4mm AA print core with Ruby nozzle, another 0.4mm AA core and a 0.4mm BB core. Let me know if anyone is interested! Cheers Rich

Hi, I'm going to be selling my UM2+, it was new in April this year. I will double check the hours on it, but they are pretty low. It will come with an Ruby 0.4mm nozzle and quite a bit of filament. I'm in the UK!. I'll PM you as well! BR Rich

This is the first issue I have had with nozzles, all my prints on the UM3 are over 30hrs normally. I have tried heating it up after removing the nozzle from the core, but I think that have the nozzle heated and cooled for probably around 12hrs constantly has caused the filament in the nozzle to stick in the nozzle. I will keep trying as I don't really want to have to buy another everlasting nozzle, sort of defeats the object. BR Rich

Hi, has anyone had any issues with these nozzles becoming blocked? I had some filament break half way thru a 36hr print. The print then continued until the end with core 1 heating the filament but the filament wasn't being pushed thru. The nozzle is now blocked and I have no idea how to clear these as the atomic pull doesn't work due to the design of the nozzle. Anyone got any ideas? BR Rich

Sorted the issue, hopefully on both printers. On the UM2+ it was a partially blocked nozzle, so a couple of atomic pulls solved the issue. On the UM2 with a Bondtech feeder I think its wearing of the drive gears. So just waiting for replacement ones to arrive to see if that fixes the issue. BR Rich

Yeah that was my thoughts as well, but to get that sort of result I would expect at least a 20°C plus temperature error. Can they really be that far out between 2 printers that are the same model? BR Rich

Hi Guys, Any idea what's causing this to happen? Using an UM2+ with Porto-Pasta Carbon Fibre filament. No heated bed, extruded at 235°C. I can print the exact same part on my other UM2+ with identical settings flawlessly. No idea why it isn't printing on this one. Also having the same issue with my UM2. Cheers Rich

Hi, I'm trying to print 30+ models at a time in Cura 2.5, but when I load one in and the duplicate it they all appear in a long line off the build plate. Is there anyway to automatically set the position of the models around the centre of the build platform working outwards? If not this is something that really needs to be implemented. BR Rich

Hi, Has anyone tried printing a Carbon Fibre material with PVA support on the UM3? Obviously with an upgraded block to allow for a steel nozzle - 3DSolex or something similar. We have had a test print done with the UM Nylon and PVA on an UM3, but after dissolving the PVA the Nylon is far to flexible for our needs. Any help or advice welcome. Cheers Rich

Are you printing with fans on? It looks like that part of the print has a very small surface area so the heat isn't dissipating very quickly so the material is oozing a very small amount. Try either turning on the fans or increasing the speed to help reduce the heat. BR Rich

I have also just installed a Bondtech feeder onto my UM2 and the difference is night and day. Its an amazing bit of kit and has transformed my UM2. Will probably get one for my UM2+ as well now. I was having major problems with over extruding and oozing of XT-CF20 filament, but with identical settings as before that issue has completely gone now. There isn't even a small bit of material build-up on he nozzle. These feeders are certainly worth their money and they are not that expensive either. BR Rich

I've been having the same issue, but this is on a factory UM2+ and not an upgrade. I can print the same part on my UM2 without issue. I have just done a test where I slowed the speed right down (way below the recommended speed for the material) and increased the temp. This did reduce the issue by a far margin, but still not perfect. I have taken apart the feeder and everything is fine in there, so I'm thinking whether this might be a temperature issue. Whether its indicated temperature isn't correct or there is some other issue. I have tried all other suggestions as above to try and fix the issue, it has even been back to UMUK to have a look at. BR Rich

Thats very interesting, will have to see where UM go with this one. I was about to upgrade my UM2 with the kit, but I will hold fire for now. I have noticed that S3D makes a world of difference to print quality, far better IMHO that Cura. BR Rich

Lets hope so. UM did find something broken in the feeder when it went back to them. So I guess it was a combination of a blocked nozzle and a broken part in the feeder! Good luck! BR Rich

I think I have sorted my problem. I had tried cleaning the nozzle out a couple of times using atomic pulls with no luck. I usually only print in black material, be it carbon or PLA, so I didn't notice that the material hand't completely come out of the nozzle. I had some red to print for a change and that gave to the answer. After changing the filament I was still getting black material coming out of the nozzle for a good 5-10mins. So I spent around an hour purging the nozzle and doing atomic pulls until it finally came out clean. I then printed a test part with normal settings (i.e. same as the UM2) and its printed perfectly again. Normally atomic pulls clean the nozzle in 2-3 rotations, but it must have take about 20, if not more, to get this one sorted. Never had it that bad before. BR Rich

Yep, I have pretty much played with everything I can think of. BR Rich

all I see is software related... not hardware... Its hardware for me as I can print the exact same file without issues on my UM2, UM2+ leaves gaps. BR Rich

I've gone back and forth between Cura and S3D and get the same results on both software. BR Rich

Hmm maybe I won't be doing that then. Yep, I have done all that. As I said it has been back to UM and they fixed something that was broken in the feeder, but there are still gaps. Using the latest firmware, printing with Carbon filament with a hardened steel nozzle at 250ºC with no fans and slower than the recommended speed from ColoFabb and still have the problem. I print the same material with tweaked settings in S3D with less extrusion on my UM2 than I have to use with the UM2+ and at 240ºC as well, and quicker. If I match the settings I use on the UM2 and use it on the UM2+ the under extrusion is much worse. BR Rich