Page 225 - CNC Robotics

CNC Robotics

Figure 10.1 ... ~ - :..J<Ul
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I WJ9Cf04li,;o,
If you are using surplus stepper motor s li ke the step-syn motors
on this machine, the maximum rate of travel for each axis w ill
probably be around 15 inches per minute. You w ill need to exper-
iment to di scover the fastest rate of travel for your machine. When
you are running the machine too fast, the step per motors w il l start
to skip turns. With steppers, the faster you ru n them, th e lower
their torqu e becomes and the load they can move decreases dra -
mati call y. Keep in mind that every time you change the rate of
trave l you need to run the system timing ut il ity. Next , click on
setup and ope n the Port Setup w indow. Choose w hich pins yo u are
assigning to each of the drivers for their step and direct ion signals
and w hich pins you are using for the limit switch circuits (see
Figure 10.2).

216