UDP Mode is a joke, not meeting expectations set by Kickstarter campaign… Disappointed

Updated on December 18, 2018 in General Discussion
6 on October 29, 2018

I just wanted to echo the frustrations of what some other users are experiencing so far with the expectations UNIZ originally set in their UDP Kickstarter campaign, compared to real world UDP use…. UDP Mode in reality is a joke. UNIZ lead us into believing we would be able to print just about anything using UDP mode during the KS campaign, but now that the UDP Mode capable machines are being shipped UNIZ has released some very restrictive UDP printing rules that further prove how much of a joke it really is. I have ran a few test prints using the UDP orange and gray, and I have to agree with others in saying that it just does not work as UNIZ originally lead us on to believe.


UNIZ clearly still has a lot more research/testing/etc to perform before UDP is ready for mainstream use. The current default settings for UDP printing do not work for most models (even when UNIZ’s UDP printing rules are followed), and the current UDP printing rules are so restrictive that printing in UDP is almost never going to be an option for anybody. In theory UDP sounds amazing, but in practice it is useless and wasteful.


From an outside perspective, it seems a lot like UNIZ used their (barely developed) UDP Mode as a way to bait and switch backers/buyers, so they could make their cheap machines more attractive to potential buyers. Very frustrating, and even more disappointing (UNIZ is very good at disappointing us…)


UNIZ please put more effort into making UDP Mode more usable (and user friendly). Many of your backers/buyers bought these machines specifically for the fast UDP printing mode with the expectation of it being relatively easy to use. Sure I am glad that these machines still work relatively well in normal (non-UDP) mode, but the speed of UDP mode is one of the main things that brought backers to your funding campaign(s)… now you need to deliver on that promise. The current state of UDP Mode is unacceptable. If you cannot get our machines to print with the quality and speed that your last Kickstarter campaign set the expectation for, then you owe your backers some sort of solution or other means of making up for this shortcoming…

  • Liked by
  • avner
2 on October 31, 2018

May I know which STL file you printed with UDP mode? If it is convenience for you, please help to provide a donwload link of you files. I think I could test your files and find what’s going on.

on October 31, 2018

Here are a couple models I tried printing with UDP so far (with both UDP Gray and UDP Orange, with LED power set to 300):





I scaled these down to smaller size for a faster test print. I also tried different print orientations with support material, as well as printing directly on platform without supports. I hollowed out the solid version and printed in UDP gray at 50 microns which gave me the best results, but even then the results are unsatisfactory (see attached photos)


I’m afraid you may not fully understand my post though. I know I am not the only user who is experiencing problems with UDP mode. UDP mode as far as I am concerned is still in very early testing stages, and is currently not of any use for SLASH UDP machine owners. UDP is the main reason most of us backed the UDP campaign, and the feature is pretty much useless.


UNIZ’s UDP Kickstarter campaign gave backers the impression that this technology has been developed to the point of being just as easy to use as the standard (non-UDP) printing mode… but in reality, that is not the case.


I was able to print the “egg(udp gray).uniz” file posted on Facebook by Peichao Wang, but the resolution was not great (layer lines clearly visible, and bubbles/holes on top/final layers).


on November 1, 2018

I totally agree with that!!!


Show more replies
  • Liked by
1 on November 13, 2018


Well, I’m trying to figure out what a hack is UDP in the first place!?!?! I’m not yet an owner of a SLASH so I’m collecting information. I already burned myself with a FDM/FFF printer ($4k), so I’m a bit cautious right now.

Anyways, I couldn’t find ANYWHERE any information what this Uni-Directional Peeling is all about. But I would assume that this is “The second best thing after a sliced bread” acording to Uniz’s CEO:

Company CEO Dr. Houmin Li explains:

Uni-Directional Peel (UDP) results from over 2 years’ of dedicated effort by the UNIZ R&D team. By reducing the up-and-down peel to one-directional peel action and using conventional materials, RI-matched cooling, improved light-engine, evolved resin formula, UDP pushes SLA printing speed to the physics limit (14800cc/hr envelope speed or 650mm/hr z-axis speed) without the help of pure oxygen or exotic separation material. This is a revolutionary solution provides speeds more than 100x that of conventional desktop 3D printing technologies such as FDM and laser-SLA.

BUT….. as far as I understand this is just a plain software trickery and a bit of commonsense physics.

Usual SLA process rises the platform “excessively” between two layers so the resin could evenly spread. Due to the high viscosity of the resin, takes time for the same to level across the whole vat. And this is a usual time killer in SLA!

According to my understanding…. UDP just thickens the layer… or continuously pull the platform out of the vat so the resin is not fully cured and as such peels more easily from the film. The problem is that for “UDP” to work resin needs to be leveled from the both side of the wall. But is you close your model like a dome, for example, the inside resin level is getting less and less so the part eventually WILL FAIL!!

I might be wrong…but this is my understanding of UDP.

The other downside is the special resin required for this operation. So, bottom line if I’m only 50% right … this technology is not worth a penny.

BUT PLEASE,UNIZ, prove me wrong and I’ll buy the printer tomorrow!!


Cheers, Franc

on December 18, 2018

The issues with UDP are TOTALLY superfluous compared to how many other seriously bad design decisions we see in the Slash OL. Pretty bad. Read the other threads.

Show more replies
  • Liked by
0 on November 26, 2018

Just thought I would add some more photos of my more recent UDP mode test prints… better, but still not great…


  • Liked by
Loading more replies