C2 User Manual, Release 1.0.0
When z-hop when retracted is enabled, the build platform of your printer will drop by a certain height.
The reason for this is to prevent your nozzle from hitting already printed parts on your build platform, as
well as eliminates unwanted extra plastic on your parts due to oozing or stringing.
5. Z-hop height
The z-hop height determines how far down your build platform will lower every time there is a retraction.
The larger the height, the safer it is, but the longer your print will take.
Cooling
1. Enable print cooling
Cooling fans are essential when printing with certain materials. Print cooling will make sure that the
previous layer of material that is extruded is cooled enough so that the next layer can be printed on top
of it with a solid base beneath it. Cooling also is needed for overhangs and will dramatically increase the
surface quality of prints. For some materials (like ABS plastics), cooling is not needed because of the
material inducing uneven shrinking and bad print layer adhesion.
2. Fan speed
Different materials require different fan speeds to optimize print quality. Some materials can shrink more
than others when cooled faster, while some dont need fans at all.
3. Regular/maximum fan speed threshold
• Regular fan speed is the speed when the printer is doing most of the work.
• Maximum fan speed is the speed when your printer is spending a minimal time on a layer and needs to cool
down the plastic very quickly to make sure it is hardened before moving to the next layer up.
4. Regular fan speed at height
The regular fan speed at height value determines at which layer the fans will turn on. Because the Robo
C2 and Robo R2 are suggested to use rafts, we determined this value to be higher due to the fact that fans
can cool the bottom layers too well, and cause warping of your print and ultimately delaminate the plastic
from the bed and causing a failed print.
5. Minimum layer time
The minimum layer time determines how long the printer should take to at least print a single layer. If
the actual print time of a single layer is below this value, the printer will automatically slow down so the
minimum layer time is reached, allowing the plastic to cool properly before the next layer is printed on
top of it.
6. Minimum speed
The minimum speed determines the lower threshold of how slow the printer will actually print regardless
of minimum layer time. This will make sure that the printer is not printing too slow, causing extrusion
and motor issues, and degrading the sureface finish of the printed model.
Support
1. Enable support
Enabling support will give your model a scaffolding underneath parts of the model that may need some
support underneath their overhangs. Overhangs are part of your model where the plastic is being laid
down in mid air. Instead of the model being printed onto air, the support structure will be able to assist
the overhangs to be held up when being laid down.
2. Placement
Placement determines where the support structure is placed. There are two options to choose from:
5.3. Settings 71
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