FLSUN QQ-S-PRO Delta 3D Printer Updated Permanent Memory Automatic Leveling System Touch Screen 255mmx260mm Printing Size

Just after the printer arrived, I received an email explaining that this model of printer was new to the US, and that I would need to set the voltage on the power supply in the base from 230V to 110V. Since I had already assembled, tested and discovered this myself, I wrote it off as 'not ready for the US Market'. There are some pros and cons with this delta, however;Pros:1) LARGE print capacity - my model will print 300+mm high models,2) FAST - compared to my i3 cartesian printers, this thing FLIES,3) 32-bit controller and touchscreen - once you figure out the menus, its pretty convenient, although the STOP function is 3 menus deep,4) Auto-bed leveling (sort of) - It uses a probe which is attached to the tool head by a magnet, but you still have to do the 'paper test' and do a 'Z-offset' adjustment, and this is trial-and-error,5) Dimensional Accuracy (for square parts) - my XYZ test cube was SPOT-ON at 20mm EXACTLY in each dimension! Shocker, especially from a delta, but there was substantial ringing and overshoot on the corners.Cons:1) Part Cooling (see photo) - there is a fair amount of 'chicken skin' on the surface of prints (see photo). I was advised to slow the prints down to fix this issue by tech support - WRONG ANSWER. The printer should print A-OK with default settings with their software,2) NOISE - this thing is LOUD - the controller is an MKS Robin MINI with older stepper drivers. Since the firmware is proprietary, it is unlikely that they can be upgraded, even though they're in sockets,3) Belt Tension Will Not Stay Tight - This led to some strange issues, like making round objects oval. The black vase-mode container in the photo is an example; the 2 halves are supposed to thread together,. but they do not.4) Bed Adhesion - if you follow FLSUN's instructions for adjusting Z-offset, your parts will NOT come off the bed! Either too much stick or horrible elephant foot - don't know if bed temp is correct,5) No filament run-out sensor - easy add-on and the controller would support it,6) Under-extrusion with the 'Titan' extruder - the bowden tube is long and curly (hey, its a delta) but there's a lot of filament grinding going on,7) OLD versions of Cura and Repetier host - since the config file is in Chinese, I cannot tune the extrusion settings to fix (6) and its Gcode vocabulary is lacking. Seems to work OK with Cura 4.6 and the QQ-S profile,8) Wifi - don't know, the docs are weak on this one, and the language barrier prevents me from using it,9) Rickety platform - the frame sways and wobbles A LOT during printing, which makes it even noisier.In summary, this printer has lots of potential, and I'm getting it dialed in - slowly - and I'm hopeful that the part cooling can be fixed with some better fan shrouds on the tool head. Some sort of locking nuts instead of thumbscrews for the belt tensioners would be an improvement. Open source firmware (or at least a link to a Github repository) would help build a community of support for this printer. The product just needs to be finished up, details polished, and better docs, to really make it a reliable unit for making stuff that works.UPDATE 19-Dec-2020: I have been using this printer to make gifts for the holidays, and one of the belts failed dramatically (see 'Con' item 3 above regarding tension - yeah, a belt let go and stretched 3 inches). I reached out to FLSUN for help, and they sent parts. I haven't received those yet, and time was an issue with the holidays fast approaching, but I found 5m 2GT belt stock here on Amazon, watched a YouTube video on how to replace/size them and PRESTO! Back in business! The 'chicken skin' issue is much better, and the overall print quality with the new belts (I changed out all 3) is much improved. I would give the printer 4 stars now based on its current performance, but I'd take away one for the premature belt failure. My messages to FLSUN regarding the belt support were answered very quickly, so thanks to FLSUN for that. Happy Holidays!

I like this product because of the fast and high quality builds.

Being I have only had this for a couple of weeks and am just finishing my first print. I will say I'm impressed. the test prints are useless though. I received a very well packaged machine that has the instructions color printed inside and on the micro SD card. I assembled it in just over 30 minutes and was ready to zero. I rushed my ender 3 experience so I waited to get feed back from my fellow print community. I had to unscrew the bottom plate and switch the power supply to 110 and checked all pre-assembled screws for tightness. I didn't have any of the issues with loose screws or overly twisted lines... tensioning the belts could have better instruction I'm told 2 things in this regard that I trust. tighten evenly and that if you "pluck" the line like a rubber band it makes a note... its repeated too many times to not be a thing. Not as quiet as I have read in other reviews. chatter and vibration are initially excessive. If (and when ) I do this again I'm going to lube the inside of the sleeves when assembling. I feel the chattering has reduced as the lube has spread. Im advised to get TL smoothers to reduce the vibration ($10-15 on amazon) to reduce surface print issues. I'm posting this experience on youtube "a theory on everything" and will update this review at a later date. currently a 4 star might be a 5 star if and when I figure out the wifi...update----9//20. PLA adhesion is definately good too good or I had a defective glass bed I took a model off the bed and a chip of glass from the bed came with it. currently the FLSUN site is down restricted by China Govt... Not knocking the printer I've read reviews where this has happened and customer support replaced the bed. Hopefully I'll be so lucky.

Ok well.....to start I can say that it was packed like sardines in a can. Definitely no way it was going to get any shipping damage. Next...was a ez job to put together being that I have lots of 3d printer background. If I was a new guy to printing I would have been lost. All 3 belts were twisted and I had to remove and redo them. Being of sound mind and a full adult male.....I did not watch the video or look at the book, I'm sure that would have helped. Next...once together...about a hour due to twisted belts...it was ez to level..set the z and load filament. The touch screen makes everything so ez to do. All adjustments are fast to make and ez to find. I'm 2 prints in and I have to say I am pleasantly surprised....runs very...and I mean VERY quiet..prints I did where on the card that came with it, the came out really good for me using the demo roll of filament. I have a big trade show end of August in Jersey so it will get lots of print time being it is faster then my other printers. I will follow-up in a few weeks on this is let you know how it weather's the storm..September 16 update. Printer is still running great. I did add 2209 drivers and led lights. Besides that it seems to be well worth the price so far. I have done about 25 lithophanes with it so far and it does a great job and faster then my other printers.

There is a few issue I been having mainly with cable management. Wish they gave a longer side cable so it it can be tucked around a beam. The layout just strange one corner you have the power cable on/off switch, next you get the long cable to the top with sd slot and usb, then you get a screen on the front. So now your always reaching over around this thing. It would be nice to fit it in a corner but cant.Other issues bed not sticking in some areas - using glue sticks to help. Not a detachable bed.So if your asking why did this fool give 4 stars, well simple fact. I got it to print, not to look pretty and does it print, bed sticking issue are common with most beds. Setup looks overwhelming but simple to put together.*** Remember to open the bottom and change the voltage before setting up. ***