You cannot simply mount a robot, wire up an extra full-mold-open limit switch
to its controller, and then start running.
The IN65 series of standard limit switches
available from Altech Corp.
That plate would compress the springs onto four limit switches
wired to a safety mat control unit, which would stop the molding machine immediately.
The optional microelectric actuator determines accurate positioning without limit switches
or user adjustment.
Emerson Process Management has expanded its Smart Wireless solutions family with the release of the Fisher[R] 4320 Wireless Position Monitor with On/Off Control Output Option, which changes the economics of automating discrete valves as an alternative to solenoids and limit switches
. Project cost and project time are reduced by minimizing engineering time, materials, control system I/O, and installation labor.
For safety, the saws are equipped with a safety enclosure monitored by limit switches
. The machine cover must be closed for the saw to cycle.
Products have IP 66 sealing against dust and heavy seas, internal limit switches
, and optional potentiometer feedback.
The Vibracon LVL-B Series vibration limit switches
are insensitive to material build-up, external vibration and flow noise, and have no mechanical moving parts for reliable, maintenance-free level sensing.
Options include control and monitoring of sequential valve gates and limit switches
that indicate position (open/closed) of the gates.
Feedback units can incorporate any combination of encoders, resolvers, peteniometers, tachometers, rotary limit switches
and specialized interface electronics.
"Some machines are designed with electronics and limit switches
all over the place just waiting to be destroyed," he says.