I'm Anool Mahidharia, co-founder of Wyolum (www.wyolum.com) based out of Mumbai, India. Those of you who attended OHS2013 would probably know of us from the BADGEr conference badge project.
We purchased two UM2 machines recently - one for my buddy Kevin Osborn in Boston, and another for me. Took almost 2 months for me to receive my machine, and I had to pay 42% duty :(
Machine was pretty banged up when I received it - lots of screws fallen off, and a couple of them missing. I had to open up most of the machine and re-assemble it. However, once I set it up and running, its been going great. I'm loving it.
I'm still having intermittent issues with the nozzle not heating up when I start a print. Although it does heat up when I use the TUNE mode. I'm guessing it's something to do with Cura (on Ubuntu) rather than the machine itself.
The wiring harness with the connectors attached to the print head had wire crimping issues - some of them were hanging on by just a strand or two. I didn't have similar connectors/pins handy, so for the moment, I've just soldered the wires to the header pins the best I can. Maybe the intermittent heating could stem from this problem too - I'll have to investigate more over the coming days.
I showed off the machine at our local maker space (Maker's Asylum) and everyone just loved it.
Yesterday, I installed a spool of ABS filament in 3mm diameter (it measured 2.90mm at a couple of places, so looks good to use). My first couple of prints warped and peeled off after just a few layers of printing. But once I used the ABS+Acetone goop and applied a thin layer on the bed, it worked like a charm.
Anool