Model 08: sewing machine mechanism
Kinematic scheme:
Dimensions:
|
|
Measured at
model [m] |
|
a |
0.125 |
|
b |
0.185 |
|
c |
0.187 |
|
d |
0.200 |
|
e |
0.100 |
|
f |
0.175 |
|
9 |
0.207 |
Explanation:
Point C of the coupler plane describes a curve that has
two cusps (approximated). For the sewing machine, to follow the thread during a
part of the motion cycle, a motion with constant velocity and quick-return is
required. This motion is generated by the x-component of the coupler point C of
the model. In the real machine the motion is applied vertically. The motion
component and its first derivative is depicted also.
Literature:
Remarks: