TAZ 6, Slop?

A forum dedicated to the stock LulzBot TAZ 3D Printer
benprusinski
Posts: 11
Joined: Fri May 19, 2017 5:58 pm

Re: TAZ 6, Slop?

Post by benprusinski » Wed May 24, 2017 7:32 pm

If you bought the printer from Frys and they don't let you take it back for refund due to Fry's crappy policy, can you get a refund from Aleph Objects within 30 days? I am VERY FRUSTRATED at the poor quality of this expensive product. It printed a few items ok the first week and now in week 2, it fails constantly on stupid PROBE FAIL CLEAN NOZ errors no matter how much I clean or calibrate the machine. The RAMBO board is fine and everything tech support had me do to troubleshoot has not fixed these issues.

lkcl
Posts: 9
Joined: Fri May 19, 2017 8:17 pm

Re: TAZ 6, Slop?

Post by lkcl » Wed May 24, 2017 11:06 pm

the quality from these prints is really surprisingly bad, in stark contrast to everyone else with this design of printer. can i suggest a few things to check?

(1) the belts: do you get a clearly-audible "punggg" sound from both the x and y belts? if you can't get an audible note the belts are far too loose and you should tension them up. loose belts is pretty much guaranteed to give absolutely dreadful print quality.

(2) is the frame sturdy? push and then twist it (two hands) at the top: if it moves backwards and forwards (at all) then check that all the corner pieces are properly tight.

(3) on all rods make *absolutely* sure that there is *zero* play in *every* bearing. grab and twist each part, looking very closely at the top of the bearing where the rod comes out. there should be *no* movement. at all. to properly check you should actually consider taking the rod and the bearing out then testing them stand-alone. the bearing should "stick" slightly i.e. not just move freely, because the bearings are designed so that the balls are squashed (very slightly) during travel.

pyrokld
Posts: 58
Joined: Sun Dec 25, 2016 7:57 pm

Re: TAZ 6, Slop?

Post by pyrokld » Thu Jun 01, 2017 2:15 pm

Well my printer is on it's way back so I'll see soon. Although I'm worried since they said they only things they did was replace the bed because of PEI bubbles (added bonus) and replaced the heater block on the toolhead because it was "leaking"? I was getting the same results with another toolhead so I'm not sure what that was about but I'll have some new test prints next week.

ScottW
Posts: 452
Joined: Thu Dec 10, 2015 1:00 pm

Re: TAZ 6, Slop?

Post by ScottW » Thu Jun 01, 2017 2:33 pm

Siropoly wrote:
pyrokld wrote:
Siropoly wrote:So I am in the same boat here, see the attached pictures. Brand new Taz 6, 1 week old today, and has never printed with out this level of banding or worse. Contacted support, have gone through all sorts of troubleshooting steps and have even more to go through. So far nothing has worked. Now I have noticed that my x and y axis are not quite "Smooth" in their movement, but nothing is loose or out of wack that I can see. Also in two of the attached there is a corner that you can see the layers are off on either the x or the y axis every other step. If anyone else here has gone through this same sort of issue I would be greatly interested in hearing what resolved it for you.
I still have my banding on all of my prints and have even gone as far as removing the Z-axis rods to make sure they weren't bent. I'm at a point with support where they want me to mail it in, and I am debating if I want to spend the 90 dollars to ship it to them for repair or replacement or keep trying. My first one was much worse, but was able to just exchange through Amazon for free because it was within the first 30 days, but with this one I had the nozzle break off the extruder and ended up waiting past the 30 day Amazon return for them to send me a new extruder.

These are my prints over the past two weeks working with support (in chronological order), starting to think this is as good as it's going to get with the stock design. These are using two different extruders too, my stock on and a .3mm one I put together myself.
pyrokld, I am right here with you. I too got mine from amazon and luckily am still within the 30 day window, this is week two. I completely feel that this printer was just badly beaten during shipping and something has shifted or broken that I can not seem to find or fix. Clearly the demo print that came with the printer was perfect, and everything I've printed since getting it has been layer misstep. I too went to the point of taking apart the z axis and checking the bearings, printed parts, couplers, tightened all of the belts, x axis rods and z axis rods/screws to see if they are bent. The attached are two prints, after rebuild, were ran separately but with no tuning between prints. If you look the layer lines are inconsistent in where the missteps take place. I also made a bone fish and the layer missteps are not consistent across the bones (let me know if you want a picture of it, a pretty cool print). This leads me to think something other than the Z axis is having issues. Could be slop in the x axis or the head of the printer. Weird though that this design would kick out a perfect test print and then not be able to get the layers to line up at all after shipping.... I'd really hate to return this as I like the printer, just wish it could print consistently....
I don't know what type of filament you are using, but some of the artifacts I see in your 3DBenchy prints look exactly like problems I've had when using damp PETG filament. In particular, the jagged "growths" seen in the cabin door openings and the jagged rail. Damp filament will "ooze" excessively, too much for retraction to correct. It can also exacerbate the banding issues.

And just because a new roll of filament came sealed in a bag, with desiccant, doesn't mean it is dry. I have had several spools of filament purchased from various suppliers, and one directly from Taulman, arrive vacuum-sealed with desiccant -- but the filament had significant moisture and problems printing.

You might try baking the filament in an oven for a few hours to see if it helps. Bake PLA at 45C, ABS and nylons at 65C, for at least 4 hours (8 hours is better for nylon). Then repeat your 3Dbenchy and see if there is improvement.

pyrokld
Posts: 58
Joined: Sun Dec 25, 2016 7:57 pm

Re: TAZ 6, Slop?

Post by pyrokld » Mon Jun 05, 2017 6:40 pm

Well this is the print after getting it back after paying 75 dollars to ship it to them for service, this is what they had told me a few days ago when they shipped it back:
Could Not Confirm: Ran a z-test and found no binding, printed an octopus which didn’t look like it had any z-binding. No noise was heard to indicate some thing was tight and rods felt loose. Rambo looked good, no blown fuses or broken wires. The heater block was leaking and was replaced and the heat bed started to bubble so the bed was replaced. This has been inspected, tested, and passed.
It's almost like they were looking for binding on the z-rods and not BANDING in the prints. Even the Octopus they sent back as the test print had obvious banding. I'm just dumbfounded at this point and not sure what to do.
Attachments
IMG_1611.JPG

pyrokld
Posts: 58
Joined: Sun Dec 25, 2016 7:57 pm

Re: TAZ 6, Slop?

Post by pyrokld » Thu Jun 08, 2017 8:17 am

Firmware 1.0.2.22 fixed my problem. The bed was in bang bang mode instead of PID so it had larger swings in temperature than it should. Really made a huge difference:

Image

ritmopat
Posts: 100
Joined: Wed Feb 13, 2019 9:22 am

Re: TAZ 6, Slop?

Post by ritmopat » Tue Feb 26, 2019 8:43 pm


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