Here I suggest you two type of fonts, one for more clear printing, one for more fast printing (speed more than 30m/min).
1. TTF font with fill
Video of setting: //youtu.be/dIXtohAdy4k
Pictures of setting:
2. Choose single line font type to print with faster speed
Video of setting: //youtu.be/PuyoMlfSvUQ
Pictures of setting:
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