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At 1.7 mya., the first Acheulean tools appear even as Oldowan assemblages continue to be produced.
Both technologies are occasionally found in the same areas, dating to the same time periods.
Especially when cutting a negative bevel the melting away and rounding of the corners occurs on the fit line.
Within the software this melting away can be compensated with a numeric variable (mm).
HGG uses this knowledge and adapts the cutting routines to maintain the most accurate cut.
By 1.8 mya early Homo was present in Europe, as shown by the discovery of fossil remains and Oldowan tools in Dmanisi, Georgia.
Most early European sites yield "Mode 1" or Oldowan assemblages.
This technological industry was followed by the more sophisticated Acheulean industry.
The term Oldowan is taken from the site of Olduvai Gorge in Tanzania, where the first Oldowan lithics were discovered by the archaeologist Louis Leakey in the 1930s.
There are a few ways to improve plasma cutting accuracy.