Oil pump presently runs on timer. It will pump immediately upon being supplied power. I would like to add a counter circuit that would disable pump for a set number of machine cycles, instead time.
Hello @oldwrench,
As I understand your requirements:
-
Activate oil pump upon first application of power e.g., at the start of a shift.
-
Activate oil pump every N machine cycles throughout the operator’s shift.
-
Activate the oil pump if the machine has been idle for T hours e.g., after lunch.
-
Once triggered, run for T minutes.
-
Alarm on low pressure.
These may or may not be part of your requirements. However, they strongly point toward Programmable Logic Controller (PLC). This is especially true if changes are to be made to the parameters.
Please clarify: why it is objectionable to continuously run the oil pump.
Sincerely,
APDahlen
Presently, the pump is on a timer. It is built in. It needs to cycle when the press is running.
However, if the operator should leave the power on, say for the weekend, the pump still cycles at set time period. Usually every 30-40 minutes.
This is where I would like a counter to override the timer. No counts, no pumps.
I am looking for a counter that I can set, that would switch a relay to turn.pump on at a certain count, stay on for a set number, then turn off for the remaining count cycle.
Thank You!
As a starting point, consider this Omron counter:
Another option is to use a PLC such as this Siemens LOGO! PLC and required software.
There are advantages and disadvantages to each solution.
You will need to determine which solution is best for your application, Perhaps the most important part is designing a failsafe into the machine preventing operation without the oil pump.
Sincerely,
APDahlen