Rostock MAX v2 Assembly Guide
The
Speed
page covers parameters that control how fast various features of the object are
printed. The speeds are listed in mm per second, or as a percentage of a related speed parameter.
The speed parameters are pretty self-
explanatory, especially if you've got the
Show
Help
check box set. However, there's a couple of
points I'd like to cover about printing speed.
First of all, there is a relation between your
print speed and the temperature you've set for the
material you're printing with. The basic rule is, the
faster you go, the hotter you print. This is because
as the hot end extrudes plastic, it's constantly being
cooled by the cold filament that's coming in.
Setting the extrusion temperature higher
allows the hot end to melt the incoming plastic at a
faster rate. This allows you to print more quickly.
The relation between print speed and extrusion
temperature is one of those things you'll get a feel
for as you gain experience with your printer.
You'll quickly learn that the Orion will
“talk” to you if you're printing too rapidly for a given temperature. The extruder will begin to “skip”
periodically (or frequently, depending on how fast you're going). A skipping extruder has a very
distinct sound – it's kind of a light bump or knocking. If you watch the nylon gear that you use to
manually feed filament, you'll notice that it will briefly rotate in the opposite direction at the same time
you hear the skipping sound. If you draw a line on the face of the gear, you can spot this motion more
easily. The skip is caused by the hot end's inability to melt the material is rapidly as is required. The
pressure builds up until the stepper motor can no longer generate the force required. At this point the
tension in the filament is released like a spring and the filament pushes back with enough force to cause
the stepper motor to skip steps, resulting in a short reverse rotation.
Secondly, there is also a direct relation between print speed and print quality. In the image
above, you'll notice that the speeds for print moves vary a bit. This is because some features don't
require a focus on surface quality.
Perimeters are a great example of this. You'll note that the inside perimeter speed is 40mm/sec,
while the outside perimeter is 35mm/sec. The inside perimeter will never been seen after the print is
finished so it can be printed at a higher rate. However, you want the visible surface of the print to be
smoother and more consistent, so you print the outside perimeters a bit more slowly.
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Summary of Contents for Rostock MAX v2
Page 25: ...Rostock MAX v2 Assembly Guide Melamine Parts Sheet 1 25 ...
Page 26: ...Rostock MAX v2 Assembly Guide Melamine Parts Sheet 2 Melamine Parts Sheet 3 26 ...
Page 27: ...Rostock MAX v2 Assembly Guide Melamine Parts Sheet 4 27 ...
Page 171: ...Rostock MAX v2 Assembly Guide 171 Fig 14 8 Spool holder support installed ...
