Altium Mechanical Layer机械层定义

北城以北

Mechanical 1 (M1)：Board outline (it is not recommended to use just the keep-out layer, since that can be used for other things also).建议作为板框层使用，不用做禁布层或其他用途

Mechanical 2 (M2)：PCB notes and comments for the PCB manufacturer/assembler (included in Gerber output).需要PCB生产或装配知悉的注释和要求，生成Gerber时输出此层
$ c0 {8 C8 b) ^& s0 H5 g' B# iMechanical 3 (M3)：General notes and comments that the PCB manufacturer/assembler does not need to know about (not included in Gerber output).不需要PCB生产或装配知悉的注释和要求，生成Gerber时不输出此层
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% U3 R& c2 V: y9 R' \( V  DMechanical 11 (M11)：Top layer dimensions (paired with M12).顶层尺寸标注
- v- F1 `9 U* [. C, A2 `! [Mechanical 12 (M12)：Bottom layer dimensions (paired with M11).底层尺寸标注

Mechanical 13 (M13)：Top layer component body information (3D models and mechanical outlines, paired with M14).顶层元器件实体尺寸信息（3D模型和机械边框，与M14层相对）
7 ]. U3 A, }3 i( C  ^Mechanical 14 (M14)：Bottom layer component body information (3D models and mechanical outlines, paired with M13).底层元器件实体尺寸信息（3D模型和机械边框，与M13层相对）

; U) X8 J: h. q' d; G1 aMechanical 15 (M15)：Top layer courtyard and assembly information (paired with M16). This normally includes a cross-hairs at the origin of the component.顶层元器件实体占位和装配信息（与M16相对），一般也包括圆心标注的十字准线
Mechanical 16 (M16)：Bottom layer courtyard and assembly information (paired with M15). This normally includes a cross-hairs at the origin of the component.底层元器件实体占位和装配信息（与M15相对），一般也包括：原点标注的十字准线

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