Position detection encoder and manufacturing method of position detection encoder

A position detection encoder comprising:

• a scale comprising:
• a position detection pattern;
• and
• a linear pattern extending in a direction parallel to a length direction of the position detection pattern;
• and
• a position detector that generates a position detection signal that changes due to a displacement of the position detection pattern in the length direction, the position detector comprising:
• a position confirmation pattern which includes two markers arranged at an interval less than or equal to an offset tolerance value for a positional relationship of the position detector and the scale in a width direction of the position detection pattern, wherein:
• the position confirmation pattern comprises a plurality of position confirmation patterns formed at different positions in the length direction,
• a position confirmation pattern of the plurality of position confirmation patterns further comprises at least one auxiliary marker that is arranged at a position on a straight line connecting the two markers,
• each position confirmation pattern of the plurality of position confirmation patterns includes a plurality of auxiliary markers, and
• when an interval between adjacent auxiliary markers of the plurality of auxiliary markers is defined as α, a distance between the plurality of position confirmation patterns is defined as L, and an offset tolerance value in a yawing direction between the scale and the position detector is defined as θ, the position confirmation pattern satisfies the relation θ>tan−1(α/L).