50 SERVO 10.2013
To give a little credit back to the Rostock folks at
SeeMeCNC, they have come up with a new direct drive
extruder shown in Figure 6. This is a much simpler extruder
that is easy to build and install. I have two of them installed
on my machine, but getting the new settings for this
extruder is like pulling teeth. This leads me to the major
issue with the Rostock Max. There just seems to be no
cohesion as a company. For example, they seem to rely on
others in the forums to support their products.
If you are looking for an experimental 3D printer that is
still in beta, then the Rostock Max may be the printer of
your dreams. If not, then continue reading as my 3D
printing experiences do get better.
Solidoodle 2 Pro
At $599, the Solidoodle 2 Pro (Figure 7)
is starting to get you closer to a 3D printer
that can produce prints consistently enough
that you can use it for prototyping your
designs. It has a BCR of 60, and features a
steel frame that is more rigid than either the
Rostock Max and PrintrBot Jr. It has a better
extruder and with some tuning, it can create
consistent prints. It isn't without its problems,
The Solidoodle 2 Pro does not use
bearings for its linear motion, but instead
uses brass/plastic (Figure 8) bushings.
Even after tuning them, I found they
would require further attention after even
a little use.