3d print multiple materials?

[Mason987]

Originally Posted by Ronnie314

Doesn't the 2x print abs? And how do you like yours?

the 2x does print ABS. We have one. We bought it this time last year and had little success with it. I finally pulled it apart to find it came assembled wrong from factory. The cheap hex bolts they used to put it together just strip out so I had to order all new screws just to it back together after reassembling it properly.

When we get it running this time my opinion may change. but the fact that it came assembled wrong really irks me, because there is no diagrams or manuals on how to assemble anything correctly. I contacted makerbot via phone and email when we first started having issues with it and they kept telling us it was a bad filament stepper motor. After playing around with it a little more we found that the cable for the stepper motor on the X-axis was bad. The cables are meant to be rigid and the cable for the X-axis moves frequently and eventually shorts itself out. Took me awhile to find an entire thread about people having this problem.

I hate to say these things about makerbot because when i first discovered them I thought it was awesome. Maybe we're just one very unfortunate case, but I'm personally not happy with it. We did buy this right before Stratasys bought them, so maybe their quality control is better now.

[RonnieS]

Originally Posted by Mason987

the 2x does print ABS. We have one. We bought it this time last year and had little success with it. I finally pulled it apart to find it came assembled wrong from factory. The cheap hex bolts they used to put it together just strip out so I had to order all new screws just to it back together after reassembling it properly.

When we get it running this time my opinion may change. but the fact that it came assembled wrong really irks me, because there is no diagrams or manuals on how to assemble anything correctly. I contacted makerbot via phone and email when we first started having issues with it and they kept telling us it was a bad filament stepper motor. After playing around with it a little more we found that the cable for the stepper motor on the X-axis was bad. The cables are meant to be rigid and the cable for the X-axis moves frequently and eventually shorts itself out. Took me awhile to find an entire thread about people having this problem.

I hate to say these things about makerbot because when i first discovered them I thought it was awesome. Maybe we're just one very unfortunate case, but I'm personally not happy with it. We did buy this right before Stratasys bought them, so maybe their quality control is better now.

We are between the Replicator and Replicator2x. Now the Replicator has the assisted leveling and I have heard that the leveling of 3d printers in fairly important, should this be a factor? If not, how hard are they to level??

[Andrew Schreiber]

Originally Posted by Ronnie314

We are between the Replicator and Replicator2x. Now the Replicator has the assisted leveling and I have heard that the leveling of 3d printers in fairly important, should this be a factor? If not, how hard are they to level??

They are a nightmare to level. It's one of the things I dread whenever I have to do it.

[coolhandluke811]

Sounds like this is your first printer(?)

Don't worry too much about multiple materials/ extruders. I have had two printers that both can do ABS/PLA. I got some PLA with my new one and haven't touched it. So don't expect to go back and forth often. Only used ABS so far.

Yes bed leveling is important and can be hard. Certain printers make it harder than it should be. On my first printer there were 4 bolts for the bed itself, and two threaded rods for the z axis. I spent more time leveling than I did

Since I only use ABS, when I went to get a new one I was focused on bed leveling. I spent 6 hours this last weekend building a MakerGear m2 and am very happy thus far. It has only one z axis motor and three bolts for the bed. Because I built it I could use my micrometer to get it close. If there is an issue as it prints, I can manually adjust the z axis as it prints.

Really cool. Highly recommend it.

[Mason987]

Originally Posted by Ronnie314

We are between the Replicator and Replicator2x. Now the Replicator has the assisted leveling and I have heard that the leveling of 3d printers in fairly important, should this be a factor? If not, how hard are they to level??

This is a bigger question than you'd think so I'll try to explain as much as I can with my knowledge. Feel free to correct me.

There are so many variables to the print quality, but if you don't have a level build table there's a pretty solid chance your print won't come out very good. If the table isn't level, you run the risk of slamming your nozzle's into the table which is very very bad. You also run the risk of crooked layers because one side of the table might be higher than the other. We usually level our printer once or twice a day.

The Replicator 2 has a single extruder, and a pop-out acrylic build table. The acrylic build plates are known to warp over time, making them near-impossible to keep level. Makerbot actually had to start giving people free build plates because some people would notice their build table was warping as much as a 1/4" (I've heard of them warping more than that, but you get the point). This problem with the acrylic tables dates back to the very first printers makerbot produced. I'd guess that the leveling assist was added into the Replicator 2 to help compensate for the warping over time to try and get a longer lifespan out of the table. It also pops out, so it might not be fitted perfectly into the printer either. The single extruder keeps things simple though, so you're not trying to keep two nozzles zero'd.

The Replicator 2 is quite a bit simpler, but you lose the ability to print ABS (which I prefer over PLA for most applications related to FRC), and you only have one extruder (limiting you to one color per print and the inability to use dissoluble filament for supports during printing and things like that), as well as some other minuscule things you won't miss unless you had them to begin with.

I'm not sure how the leveling assist works with the Replicator. Someone mentioned something of LED's but I haven't done any research on this myself. However, they use slightly different leveling systems. On the 2X, there are three turnable knobs that allow you to adjust the stiffness of springs to help keep the table flat. There is a knob on the left side of the table closest to the opening, another one on the right side, and knob on the far side of the table located in the center. Link for somewhat of a visual. Personally, I don't think this is an optimal way to zero the table but it seems to hold up and I haven't heard anyone gripe about it too much.

The Replicator 2 uses four knobs like so. Personally, I think this is a lot better than the 2X leveling system, but the tables acrylic so there's a trade off somewhere in there.

The Replicator 2X has a lot more going on. It has a heated ceramic(?) build plate to allow the ABS to stick better (you'll still need to print a raft though. it doesn't help enough unless you have a very large surface area on the first layer of print), it has two extruders that you can use to print different colors and even materials, and it was built to print both PLA and ABS. The issue with this combination of materials is that ABS has to cool down slower than PLA or it will crack/lose strength. PLA has to be cooled off pretty quickly for the print to set optimally. This is why the Replicator 2 has a filament fan, to help set the PLA faster so you can pull it off the table quicker. The Replicator 2 can produce a much higher quality print using PLA than the 2X can with PLA. PLA sticks to the acrylic table better, and its optimized for PLA. The 2X is definitely better for printing ABS than PLA, and the print qualities have very obvious differences.

Really, I would decide what material you prefer to print in. If you're going to use PLA 90% of the time i'd get the replicator 2. If you're going to use ABS more than PLA, get the 2X. The rest of the issues will be worked out as you familiarize yourself with the printer.

Someone with more experience using both printers might be able to give you a better idea.