TECHNOLOGY - The technology of the Makerbot Replicator is unsurpassed. It is cutting edge. There are only 3 dual extruder 3d printers on the market currently; Leapfrog Creatr (Netherlands), Bukobot 8 Duo (USA), and Makerbot Replicator (USA).
I placed a long distance phone call from the USA to the Netherlands and talked with them about the Creatr. It is capable of printing in dual plastics only if one of the plastics is a support material such as PLA. It is not capable of printing a dual colored object, yet. They will be capable of printing dual colored objects soon, but their Creatr's creator didn't call me back with a ETA. Maybe his co-worker forgot to pass it along or maybe even the creator doesn't know. The Creatr uses Slic3r and Pronterface.
The Bukobot 8 Duo uses Repetier Host with Skeinforge or Slic3r. None of the demo prints on the Bukobot website are dual colored and it describes his dual extrusion kit as "experimental". It looks like that the Makerbot Replicator is the only 3d printer that can realistically say it has true dual extrusion capability. It beats all other 3d printers in the technology department.
EASE OF USE - The Makerbot Replicator is not easy to use. I have had it for about 5 weeks. I have only had it printing for 1 week that I had it. Here is my saga;
1. At first I though it was a defective machine. So, Makerbot sent me another machine. It still didn't work. It turns out that it was not Windows Vista compatible.
2. HBP was warped. They sent me another one.
3. Plastic filament keeps slipping between the spool and printer. I printed out a
Filament Spool Guard .
4. Plastic fumes made me light headed. Printed out
Fume Scrubber .
5. Nozzles clogged. They sent me two more.
6. Spring loaded screw knobs that levels HBP are loose. Apparantly if you heat it and use it, the springs sag so that even at the highest position, the nozzles do not come close enough to the HBP. I am currently trying to move the Z axis stop switch up a bit so that the HBP will be able to come up high enough to be within 1 paper thickness of the nozzles. The threaded z axis rod gets in the way of reinstallation of the z axis switch so I cannot reinstall it. My fingers are too fat. So, I tried duct tape and a ruler to hold the nut, but the nut fell in the crack behind the "Replicator" placard. I was about to cry when I noticed that I had an identical washer in my tool box. After I finish this review, I will re-try the installation.
The Makerbot Replicator is not very easy to use. However, in all fairness, other dual extrusion 3d printers are not easy to use either. Take a look at
Deepak's review of Leapfrog Creatr . He also had lots of problems getting his machine to work. The biggest pains in the butt with the Makerbot Replicator are;
1. Kapton tape replacement weekly. There are 2 pieces of tape you have to match up and place on the platform with no bubbles. This is 10 times more difficult than installing the screen protector on your iPhone due to it's sheer size (relative to the iPhone) and the need to coordinate 2 pieces of tape. This is a big headache.
2. The need to disassemble the extruder and clean out the gears weekly. This is a small annoyance.
3. The need to re-level the HBP after every print unless you've printed out the
Replicator HBP Height Adjustment Retaining Jig . Even so, you need to re-level the HBP twice a week. The HBP adjustment knob springs become soft and saggy very quickly with use. This is the Makerbot Replicator's biggest weakness. It takes an average of 30 min to an hour to adjust the HBP. You have to adjust it to within a fraction of a mm. You cannot see a fraction of a mm, so you have to use a sheet of paper and go by feel. Every adjustment you make will affect the adjustments of the other knobs. It is truly a nightmare. You don't have to be so exact when making single color prints, but when doing dual extrusion for dual colored prints, you have to be spot on exact or it will turn out badly.
4. If you are doing dual colored prints, the relative heights of the extruders have to be exactly level or it will turn out badly. The factory only tests with a small square. They need to test with a large square because the stage warps when heated. The end of the HBP facing the front of the machine will sag about a mm. If the dual extruders are not exactly the same height then one of the colors will not get deposited and air print. Also, when using Kapton tape (per the factory's website) to adjust the height of the extruders, when you screw the extruder back on, the heights will not be as expected because how much you turn the screws will also affect the extruder height.
The Bukobot 3d printer uses screws to adjust the HBP height, but I don't know if it uses a spring loaded screw. I also don't know if you don't use a spring loaded screw will you risk damaging the nozzles accidentally when adjusting the HBP height. I also don't know if the spring on the Bukobot is more resistant to sag causing frequent readjustment of the HBP (if it uses springs). The Bukobot 3d printer also uses tape on the HBP like the Makerbot Replicator. I don't know if it is a one-piece tape or two piece tape. The Bukobot 3d printer also has extruder gears to clean, but I don't know if you can clean the gears without disassembly. In any case, it is clear that it uses tape, has extruder gears to clean, and needs HBP height adjustment with 4 knobs. So, it is not clearly superior to the Makerbot Replicator.
The Leapfrog Creatr doesn't have user adjustable HBP. It has a HBP but it doesn't need user adjustment. This is good. However, I don't know if you'll have to put up with warping ABS prints. I noticed that all their prints uses the ABS/acetone slurry technique and that they use the "brim" technique when printing, too (printing a flat extension extending from the outside edge of your printed objects to help adherence). I also noticed from the photographs on their website that the build platform is obviously not perfectly flat. It also uses HBP tape, but I'm not sure if it is one piece tape or multiple pieces. There are extruder gears to clean but at least it is of an open design so you don't have to disassemble it. Again, it is not a clearly superior design to the Makerbot Replicator.
CUSTOMER SERVICE - Open source hardware means that you are selling something that anyone can copy. There are several Makerbot Replicator copies on the market right now. For example, there are the Tangibot and the Mbot. Both are made in Asia. Good luck with their customer service/ tech support WHEN (not if) something goes wrong! So, if everyone else is selling the same and/or similar stuff as you at a CHEAPER PRICE, what makes people want to buy your product? One answer: CUSTOMER SERVICE. If you're selling open hardware or software, you're selling customer service. Makerbot customer service is stellar. Guys like Gavin Murphy, Ethan, Mike B and Jason are the legs that Makerbot stands on. Without them, there is no Makerbot. Every time I've come across a problem, they're there bending over backwards to help me.
CONCLUSION - Although the Makerbot Replicator is a finicky machine that has to be fixed a lot, I still recommend it because there are no other dual extruder 3d printers available in the market that is superior to it. Also, any time something needs to get fixed, Makerbot's stellar customer service team is there to help me.