On 03/21/2015 09:22 AM, Viesturs Lācis wrote: > Hello! > > My customer acquired different abrasive hopper system for their > waterjet and now they want me to implement some controls over it. > I managed to do that, but the problem is that it can not be left in > "on" state for extended time as it causes the abrasive overfill the > small tank on abrasive regulator unit. > There are no sensors or anything I could use, so currently my only > idea is to turn it on and off on timely basis. > > There are long-range optical sensors that are used for this exact purpose. When the hopper is full, it blocks the light and shuts off the filling. These either have one unit and need a mirror on the far side, or they have two units, one sends the beam, the other senses it. We even have stuff like this on our electric garage doors to stop them when someone is under the door, so it is not real high-tech stuff.
But, you can get modular electronic timers for general industrial control purposes. Some have dials, others have screwdriver slot adjustments or switches to set the time. Jon ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
