gun_mike
Newbie level 2
Hello, I'm new to this forum. I have some high school electronics experience, and basic electronics tools: soldering iron, multimeter, adjustable power supply. I'm in the CNC field, and I'm working on a new project for one of my machines. Its a digitizing probe. The probe is a single NC switch, the probe detects a workpiece and tells the machine the current positions. The probe is usually wired to the machine controller via a 2 conductor wire. The machine controller is a windows based PC that runs a DOS program to control it. The probe is wired to the computer through the parallel port. The problem is, that it is bothersome to have this wire connecting the probe to the controller. In industrial probes, the machine controller and probe are connected by wireless RF. My plan is to come up with a small transmitter that will fit in the probe, and a receiver that will detect the opening of the switch (probe) and perhaps trigger a relay to open the circuit wired to the parallel port.
For this to work well, there has to be a few criteria.
The whole system must work very quickly, 1/4 second or less.
Has to work within a 15 foot radius.
Should be shielded from interference (less critical).
Ive found this circuit for the transmitter. My plan is to simply add the probe switch into the circuit. Then to have the receiver monitor the incoming signal and trigger the relay once the signal stops (probe contact, NC switch open). I don't know how practical it would be to use this transmitter. And I'm not sure how to detect when the signal is no longer being sent.
Thanks for any Advice, Its much appreciated.
Mike
For this to work well, there has to be a few criteria.
The whole system must work very quickly, 1/4 second or less.
Has to work within a 15 foot radius.
Should be shielded from interference (less critical).
Ive found this circuit for the transmitter. My plan is to simply add the probe switch into the circuit. Then to have the receiver monitor the incoming signal and trigger the relay once the signal stops (probe contact, NC switch open). I don't know how practical it would be to use this transmitter. And I'm not sure how to detect when the signal is no longer being sent.
Thanks for any Advice, Its much appreciated.
Mike