In combination with the SD card addon (included in the ultipanel) you can print pre-made GCode files without a computer attached.
Also, printing from SD is faster then printing trough USB, so you have less chance of buffer underrun.
As for when you have a PC attached, with an LCD you can monitor the temperature at all times without having the PC request it all the time (causing more buffering problems)
The readout panels seem to have a cool factor, but does it add any function. I already have a separate pc that returns the diagnostics I need thru ppronterface, rep, or netfabb. What could I gain from having one?
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