BIO X6 User Manual v. 1.0 92
The temperature of the printhead. Changing the temperature of some materials can alter
their viscosity. Check which temperature the material prints best at. Certain materials require
a cooled printhead to keep from premature gelation, such as Matrigel and collagen.
Pre-flow delay:
The amount of bioink that is extruded before starting a new filament as well as infill on each
layer. Increase the Pre-flow delay if the bioink is not extruding at the start point of each layer
of the filament. Decrease pre-flow if there is an accumulation of bioink at the start point. It is
recommended to set between 0200 ms.
Post-flow delay:
The amount of bioink that stop extrusion before the end of the filament or before the last
coordinate of the filament. Increase post-flow delay if extrusion need to stop far from the last
coordinate of the filament. Decrease post-flow if extrusion needs to stop close to or on the
last coordinate
4.6.4 Helpful hints and troubleshooting
To improve the structures even further, open the Flow delay (Advanced) option, settings bar
and adjust the extra pre-flow delay and post-flow delay. Some parameters are closely
connected and can be adjusted in relation to one another. For example, if the filament
thickness is as desired, but the speed is reduced by half, combine this change with doubling
the pressure to retain the same filament thickness when printing at the lower speed.
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