HI,
thanks for the offer to answer a question:
I do it on a daily basis so I can probably answer them.
When controlling motion of a slow moving (less than 50 cm/sec), track guided car, with a mass that might crush a finger, but not a hand. How should the sensors that detect objects in the way be wired, and how should the logic be diagrammed? Say there were 4 sensors in a position on the car, such that if something were on the two tracks, a sensor would toggle when it felt the object in it's way.
Should it be diagramed like follows? (note the white spaces in front of the R1, R2, R3, etc. are removed when I post the comment, so they don't line up over the normally closed sensors.)
| R1 R2 R3 R4
|---|\|---|\|---|\|---|\|----[MotorController]-----|
such that the four N/C sensors are wired in series, and logic on the Motor Controller is set such that it will tell the motor to stop should any one of the sensor open?
Or is it more appropriate to desribe these sensors as switches (which is what they really are!)
| S1 S2 S3 S4
|---|\|---|\|---|\|---|\|----[EStop input for MotorController]-----|
or should these be diagramed such as
| x1 x2 x3 x4
|---|\|---|\|---|\|---|\|----[Estop input for MotorController]-----|
If describing the logic only is it necessary at all to include any information about the voltage levels that the Estop input for the motoro controller requires, or should this information go in a seperate schematic?
thanks,