Kelant S400S Product Manual page 23

Support type Settings can be divided into fine, medium, thick. Each
setting has a corresponding parameter setting.
Thin: the contact area between the support and the model is small, easy
to remove the support;
Coarse: the contact area between the support and the model is large and
stable.
It is recommended to set it to "medium", and the default parameter is
recommended.
Bottom plate height: adding bottom raft will make the bottom layer stick
to the platform more firmly. Parameters can be changed according to your
own requirements.
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