My mill has a few switches, such as low lubricating oil level and
motor overheat switches, all NC.
I wanted to ask what is the standard way of wiring this stuff. Just
all in big series with E-stop switches? Or separately as separate
inputs so that I would know what the problem is?
If you're short on inputs, just put them on indicator lights. Otherwise, its
a control input. Then you can program what you want. For example, I have low
air do a feedhold then spindle stop. That way you don't ruin a part. You can
just do cycle start when problem is corrected.
As a machine tool service tech..Id personally love to see some sort of
individual indication of problems, issues and so forth.
If you are up to doing so..it makes life much easier down the road.
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Ignoramus12838 fired this volley in
Ig, that's really a matter of choice. I, personally, would want more
information that simply, "something's wrong", but I've wired process
machinery up like that when I didn't have enough inputs on a PLC to
handle all the errors I might have to detect.
When you do it that way, you need to create a step-chart to remind you of
all the things to check when the alarm goes off. Three years from now,
while you're milling parts, it might not be as fresh in your memory as
I can see digital logic in the use of the switches.
Run if this light is on but when this other lights - shut down....
I'd consider a machine motor off and a all off.
The idea is to have a scram button that is 'all off'. Then Gunner
walks up to troubleshoot and he turns off the motor switches and
enables power. The lights will show. The 'lights' might be relays
that drive lights or fans or pumps...
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IHMSA and NRA Metallic Silhouette maker & member. http://lufk> My mill has a few switches, such as low lubricating oil level and