Ok I was about to start another thread but I guess I’ll vent here. I’m trying to do a large print on the dual extruder. It originally was an 120 hr print but I split it in half and it is now two 45 hr prints.
I have had SO MANY FAILED ATTEMPTS that I’ve lost count. I ended up printing the first of the two prints using just one extruder and managed after two attempts to succeed. I am now trying to print the second of the two with both extruders.
I have had multiple problems. On some prints the extruders lose grip and the filament pulls out. On other prints one extruder stops extruding because it gets clogged. I changed the retraction to 1 mm to see if that works, and it seems to work so far.
I had an issue that it was stopping the prints because of a filament runout warning and after that each time I want to print I must first send the M412 S0 command to disable the filament runout sensors.
On one print the machine decided to think that it was done after the first 10 layers and went back to the home position and refused to continue, even though the screen said it was still printing.
The latest problem is that one of the filament heads just stopped working and the fans stopped working. So it was no longer heating until I turned off the machine and turned it back on again.
Also I forgot to mention that I needed to change the extruder tips to ruby 6mm tips to allow for the carbon fiber petg. After changing the tips that has no longer been a problem, but all the other problems continue.
At this point I’m convinced that this is by far the worst product that Snapmaker has come out with. It’s garbage. Who ever came up with the idea of clip in extruders anyway? Who possibly thought that might work?
Failed print again. Annnnd I’m finding out now that there’s only a seven day warrantee on this thing. I’m going to start looking at other options for a dual extrusion machine.
Don’t let yourself be discouraged - the forum has a bias towards problems - people write a lot about what does not work (naturally), those that are successful tend to be quiet. This raises the impression that there are only faulty units in the wild. To me it seems that indeed the DX has quite a few lemons in the first batch, but that should encourage you to try yours asap so that you can claim warranty replacement in case of systematic problems.
yeah it may take a little tinkering more then people expected for the price. But it will work if you put the time into it.
Step by step dont assume anything. and if you can dont use the auto calibrations at first.
The clip in hotends is has caused problems for me a couple of times. They lose their calibration pretty easily from trying to open the gear latch or bumping them.
One also become improperly seated and I had to shut down and re-seat to fix an error.
I have basically given up hope for TPU. The old extruder was better than the new one for it, and it wasnt really great before either.
I am doing some petg parts right now and it seems to be printing them out nicely enough. From what I understand, it should be able to handle higher temperatures than before - but I have heard there is a current limitation and the bed wont get as hot. The bed is already insufficent as it is. I previously tried ti rig in a 110vac heated bed, but it was not working out well with the glass bed from the swift disfiguration agains the clips I used, broke the glass immediately.
Since I dont have the glass bed on right now, I may try that again. The higher hot end temprature doesnt help if the bed doesn’t get hot enough to hold the materials that need it.
The temperature for the 2nd hot end needed increased for the “breakaway” filament to not get jammed up and stop printing. They both sputter a little bit, presumably from this “wedge” to install that is too thick to fit in mine. Was going to screw around with that a bit later though.
The TPU problems are my biggest gripe by far. They told me it would be much better and it clearly is not. The filament just wraps around the gears and comes out of the side of the hotend.
Why why why did I buy this module? Nothing I’ve bought from snapmaker has worked why did I expect any different here?
Ok so at least you guys have your modules registering with the printer, mine is dead with the dual module installed. I can’t upload the video it’s too large file but if I go into calibration or control tabs I just get a black screen of death nothing happens and have to power down.
Shortened version with swearing cut
Ugh… If you plug the original module in, does it work?
Maybe if you try a factory reset it will help.
I had problems registering mine, but it was a different issue. It failed calibration attempt. After booting with it unplugged and then booting again after plugging it in, it did calibrate.
Yeah, plugged back in the single extruder and that registers. I’ll factory reset and update but I really didn’t want to, I just want this POS machine to work as advertised I’m angry with myself for throwing even more money at it. Besides, I’m away from home at the moment so it’ll be a few weeks until I can tinker.
I’m also really frustrated right now. I knew better than to buy the module. I went through the whole drama from kickstarter to delivery to issue after issue after issue. I bought it anyway because I was told it could handle TPU better. Why did I believe it? Foolish move on my part.
After my issues with getting the new linear modules, power supply, and dual extruder all installed at the same time and working, I can tell you that you NEED to connect up to Luban with the USB cable and re-identify what machine you have and what extruder is installed, and then after that run the M503 and M500 commands to reset everything, shut down and restart.
heh, don’t feel too bad, they suckered me in too 
I saw that dual extrusion could print proper filaments (TPU, Nylon) and ordered it. Arrived last week but I finally have the snapmaker printing well with the original 3DP toolhead, and I’m a little afraid to lose that at this point so I haven’t even taken it out the box yet. Which kinda defeats the purpose of having a 3-in-1 machine, if you worry about changing modes. A transformer this thing is not.
BTW, I forked out for the new linear modules during a black friday or end of year sale or something. Installed them when I finally did the Y-axis linear-rail upgrade (which I suspect is what really fixed my 3DP problems) and the machine has been operating as well as they originally advertised it to. What, two years worth of tinkering and an aluminum supporting frame designed and machined for the bed? I musta missed that part of the fine print. But hey, maybe it was the linear modules - at least they cut down the griping from the missus so I can now run the printer overnight.
Yeah printing TPU on a large bed was one of the primary reasons I bought this, support material will also help with printing my designs.
So the linear modules were worth it?
I kinda wanted to buy them, but then again…
Hard to say. I installed them while I had the A350 apart for other fixes, which is bad science but a great time-saver. I have found that they are quieter but not silent (I can still hear them in the room above the printer, albeit faintly), they seem to operate more smoothly but that could just be anti-backlash updates in the firmware. Might be worth doing next time they are on a blowout sale.
When I’m off bandwidth restrictions in a week or so I’ll post a thread with the mods. I made the mistake of trying Fusion 360 out early in the billing-cycle and it used up 20% of my monthly data allowance (satellite internet is teh suck) in a couple of hours.
Yes. I ended up getting them when one of mine failed but they are a great improvement over the originals.
Good to know.
Does anyone know the proper gcode to prime both nozzles? I tried it one way and it wasn’t feeding the 2nd one, so i re-arranged it, and it just double feeds the first one now.
I havent messed with this for awhile and im rusty. I tried to go i nand comment each line of code, there
M107
M425 X0.000 Y0.000 Z0.035 F1 S0
M104 S[extruder0_temperature] T0 ; Set Extruder 0 (Left) Temperature
M104 S[extruder1_temperature] T1 ; Set Extruder 1 (Right) Temperature
M140 S[bed0_temperature] ; Set Heated Bed Temperature
G28 ; Go to Home Position
G90 ;Absolute Positioning Mode
M109 S[extruder0_temperature] T0 ; Wait for Extruder 0 (Left) Temperature
M109 S[extruder1_temperature] T1 ; Wait for Extruder 1 (Right) Temperature
M190 S[bed0_temperature] ; for time to wipe nozzle clean prior to start
G1 X-10 Y-10 F5000 ;Shift Module on X and Y to Bottom Left Corner (Outside Print Area)
G1 Z0 F1800 ; Lower Module to Bed (for Corner Knocking the Prime Extrusion)
G92 T0 E0 ;Set Extruder 0 (Left) Position to Zero (Pre-prime)
G1 T0 E45 F200 ;Feed Extruder 0 (Left) Filament 200 MM at 45 (Priming)
G92 T0 E0 ;Set Extruder 0 (Left) Position to Zero Again (Post-prime - Ready to print)
G92 T1 E0 ;Set Extruder 1 (Right) Position to Zero (Pre-prime)
G1 T1 E45 F2000 ;Feed Extruder 1 (Right) Filament 200 MM at 45 (Priming)
G92 T1 E0 ;Set Extruder1 (Right) Position to Zero Again (Post-prime - Ready to print)
Looks correct to me.
maybe try just priming the right side to bug check. Take out all T0 for the short term and see if a single prime can get working?
Just a thought
i am able to prime the left one, but it skips the right one. it was actually priming the left one twice. oh well ill figure it out.
I ment to try snd only do the right on alone