User manual

TMCM-1021 V1.2 Hardware Manual (Ref. 1.00 / 2012-MAR-09) 6
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3 Mechanical and Electrical Interfacing
3.1 Size of Board
The board with the controller/driver electronics has an overall size of 28mm x 28mm in order to fit on the
back side of a NEMA11 (28mm flange size) stepper motor. The printed circuit board outline is marked green
in the following figure:
PCB outline
25.5mm
R 2.5mm
27mm
27mm
25.5mm
28mm
28mm
28mm x 28mm
Motor backbell
R 2mm
R 1.3mm
Figure 3.1: Board dimensions and position of mounting holes