Wiring various machine health switches

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?

Reply to
Loading thread data ...

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.


Reply to
Karl Townsend

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.


One could not be a successful Leftwinger without realizing that, in contrast to the popular conception supported by newspapers and mothers of Leftwingers, a goodly number of Leftwingers are not only narrow-minded and dull, but also just stupid. Gunner Asch

Reply to
Gunner Asch

Ignoramus12838 fired this volley in news:sLWdnernq_GD66LRnZ2dnUVZ snipped-for-privacy@giganews.com:

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 now.


Reply to
Lloyd E. Sponenburgh

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...

Mart> My mill has a few switches, such as low lubricating oil level and

Reply to
Martin H. Eastburn

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.