Quote:
Originally Posted by Alan Anderson
If the motor is forced to stop whenever a limit switch is pressed, it will stick at the end of its travel and never be able to leave.
One easy way to do it "right" is to use the "top limit" switch to turn off the motor only if it's being commanded up, and use the "bottom limit" switch to turn off the motor only if it's being commanded down.
Code:
// use operator console buttons to decide which way to run the motor
if (ds->GetDigitalIn(3) != 1)
motorvalue = 1;
else if (ds->GetDigitalIn(4) != 1)
motorvalue = -1;
else
motorvalue = 0;
// stop motor from being commanded forward if at lower limit
if (Carriage_down->Get() == 0 && motorvalue > 0)
motorvalue = 0;
// stop motor from being commanded backward if at upper limit
if (Carriage_up->Get() == 0 && motorvalue < 0)
motorvalue = 0;
Carriage_motor->Set(motorvalue);
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I deleted my post, it was wrong, thank you for correction! =D