Welcome Replicator 2X Operators!

by TheNewHobbyist

I've created this group to collect all the tips and tricks of Replicator 2X operators, hackers, and modders.

Post your best Rep2X tweaks, post the things you wished were available when you got your bot!

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Extruder not Pulling Filament

by LGervin

My lab has an dual extruder 2x but neither one will pull filament. I've taken the extruders apart to unclog them but they still won't pull the filament & print anything. Any thoughts on what I should do next?

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Printed object to small

by Friki568

I have drawn a part with a length of 179 mm and sliced it in the makerbot program.
In the program the part is on 100% size and is 179 mm.
After slicing and printing the part is 177 mm. Can I calibrate this?

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Looking for some help with printing PLA, PET and Nylon

by Chedwards

TLDR: Is it possible print PLA, PET, conductive PLA and nylon with stock style extruders? Is the solution lowering the print temperate to reduce heat-creeping or is lubricating the filament with oil really the most viable option? Is there something I'm completely missing?

I've been running a 2x at work for a few years now and a year ago I got materials other than ABS, a few spools of PLA and PET. Its been able to print ninja flex decently although parts would suffer from a little overheating. ABS has never really been an issue for the printer and I was successful early on with PLA but it would always stop feeding mid print. Specifically the filament would slowly stop feeding after a few layers and eventually start grinding on the drive gear. This had all been with a completely stock printer.

So back in the beginning of the summer I replaced the nozzles with Fargo Printing replacement nozzle assemblies and the stock filament drive assemblies with some machined aluminum ones off amazon. I also added a cooling fan for the filament on the front of the gantry. That was the easiest part of the whole upgrade because the main board already has a dedicated connection for a fan and Simplify3d is able to activate it. The upgrades fixed some old feed and extrusion issues the printer always had. At that point I went back to trying PLA and ninja flex. The cooling fan makes a huge difference with the ninja flex and PLA but the PLA would still stop extruding mid print.

Shortly after upgrading the 2x, I upgraded my own printers with good all metal extruders and learned about their advantages. That's also when I learned that the internal lubrication coating and heat break are critical to making them work so well. I though since the 2x stock nozzles are essentially early versions of all metal extruders the problem was the filament drive assembly. After thoroughly checking prints I came the conclusion that the drive assembly is able to push the filament much harder with out it grinding and the issue was with the extruder. One thing I think that has been happening is heat-creeping up from the heater block into the thermal barrier tube. The stock designed tubes don't have much of a thermal brake and the way it mounts the the assembly block does not allow for much heat to be drawn off. If the thermal barrier tube overheating the filament then I'm assuming lowering the temperature would resolve that issue. I played around with that earlier this week and found it helped a bit but lead to layers adhesion problems and outer shells not extruding at the start.

Looking at other solutions, I've come across a lot of talk about lubricating the filament with something before it goes into the extruder. The idea being that the filament is expanding inside the thermal barrier tube and sticking to the side walls. Pre-lubing the filament would help the potentially clogged filament I really don't like the idea of doing that. Not from a fume or fire risk but just because that's just another variable to account for when trying to run an already old and poorly designed printer. I'm also thinking the new thermal barrier tubes are much like the stock ones in that they completely lack any lubrication on the side walls. I was reading further that ABS would not be as prone to problems like this because it supposedly flows better when melted when compared to other plastics. PET, PLA and softer plastics don't flow as well when heated or even bind to the thermal barrier tube more than ABS. To me that makes since because I've always been able to print ABS throughout all of this.

I'm really just rambling at this point. I've been trying to get the most out of this printer for years and want to be able to successfully print more than ABS. I want to know who else has voided their warranty by printing anything other than ABS or HIPS in their 2x. Also if there is something I'm completely missing please chime in.

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Settings for Hatchbox ABS

by lslockridge

I know the 2X is made for ABS, but I need some help. I'm in my first year of teaching Engineering Technology and am trying to get the 2X that the school bought last year printing efficiently. They teacher before me was put off by the new technology. I've tried adjusting settings for Hatchbox ABS, and I haven't had great luck with a good finished print. Right now, I'm using 240c for extruder, 110c for bed, and 70 mm/s for print speed. I've read about adjusting the fan speed, but was wondering what the best settings are for when it comes to Hatchbox ABS.

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duel extrusion

by Toby-Bunker

when i do duel extrusion prints my left head moves to the right and starts making a awful clicking sound .
does anyone know what i need do to fix this.

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Simplify 3D FFF file

by Selphb

Does anyone have a good FFF for ABS they can share??? I am happy with my current quality but just curious if i can get it any better.

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Right Fan not starting - Extruder heats up

by alpokemon

What can I do to figure out why the right cooling fan is not turning on?

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Replicator 2X dual head alignment process

by alpokemon

Ok, so after spending a few hours jerking around with plate leveling, this is what I found works best for aligning the two heads.

1 - Level build plate to one head left or right it doesn't matter
2 - Disassemble the other head (non-leveled) and remove drive motor that you did not use for leveling
3 - Center the heads to the middle of the build plate
4 - Loosen the set screw for the head that you did NOT level
5 - Use a piece of glass and place it under the heads and manually raise the bed by hand via the center screw until the glass makes contact with the head you leveled
6 - Set the height for the head that you did not level with. Set the set screw lightly.
7 - Slide the plate left and right off the heads to make sure the plate can go between BOTH heads with the same resistance. Repeat #5 and #6 as needed until you are satisfied with the alignment
8 - Tighten set screw for the newly aligned 2nd head
9 - Re-assemble the drive motor

IMHO, this is the best procedure to align both heads to the same height relative to the build plate level. Now the factory build plate isn't the highest quality and I'll probably be upgrading that to one that is even more flat.

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New Z axis setup!!!!

by Selphb

I finished machining the build plate setup in the link below. I do have to say it is way more stable than the bottleworks setup and bolt on side plates i have tried.


Aluminium Arms Z-Axis Upgrade - Makes your Makerbot Replicator 2 and 2x a real tool
by Selphb
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