General Wiring Advice(Noise Imminent)

[dsnellen]

I don't think the fan or F.L. will have any influence.
How is you probe connected? does it go straight into the P.P. or is does it go through a BOB or have a separate supply?
Al.

It goes through the BOB using pin 13. It shares this pin with the tool zero plate.

Dave

[Al_The_Man]

What BOB are you using?
Al.

[dsnellen]

What BOB are you using?
Al.

It a C10 & using CW250 Drive controllers.
Dave

[Al_The_Man]

You could earth ground your 5v supply, but if using 5v you most likely could have use the PC 5v supply?
Al.

[mike_Kilroy]

Al,
''''''''''''
The probing is better. I have a simple program that makes 20 probes at various point around the table. The success rate has increased to about 70% valid probes from less than 10%. I still get random E-stops although at a lesser rate.

What else should I do? ..............

dave, ur on ur way grounding stuff right by following al's advice!

r u aware u have a SWITCH BOUNCE setting in ur mach3 for the estop input?
I had a customer fix their estop noise problem by increasing from the default 2msec?? to like 200msec on this. this may be the final 'fix' for u now that u have grounding and shielding better.... let us know if so....

[Al_The_Man]

From all the PC systems I have installed noise free, I feel alot of the implementation of 'debounce' settings is treating the symptom, but not implementing a real cure.
It may be expedient, but I like to find the real cause. .
Al.

[mike_Kilroy]

agreed; why i put 'fix' in quotes. but too, with pc based control like mach3, this may be best that can be accomplished. this would never be the case on an industrial nc.

[Al_The_Man]

In some of the prior posts here from those that have chronic spurious trigger problems, I have stressed the need for proper grounding and bonding and it has often cured random trigger issues.
With industrial systems, the manuf. has complete control over all the individual items in the control and so that all one has to do is follow the recommended installation.
With systems such as Mach that are often implemented by many that do not have a systems control back ground, and also consist of a few different unknown components is in my opinion why the different Drive and BOB suppliers place a stress on total isolation between components, this is IMO an effort to prevent problems interfacing with other unknown products.
The result is that also IMO, that problems can be induced by trying to isolate all parts of the system.
As a system integrator, I have always prescribed to the credo of bonding all parts of the system to earth ground.
This has stood me in good stead for many years in PC based systems in some of the most harshest of industrial environments and is the reason I try to show those that have problems that they may not necessarily have to live with them.
My 2c.
Al.

[Al_The_Man]

Another noise nuisance solved!
VFD 3ph inductor
Al.

[dsnellen]

Al,
Sorry I haven't followed up. Out of town, guest, etc. I did rewire from the C-10 BOB outward using Cat 5 and connectors. That cable runs to my BOB which divides the Cat 5 wires into X axis switches and spindle area switches. The probe has worked correctly 100% of the time since.

I am thinking problem solved until this afternoon when after about an hour of run time I started getting random and constant E-stop and limit switch stops. I disconnected the switches from the BOB and continued to get stops. I seems like it started and occurred at random. If I have a ground issue it must be in the electronics box somewhere.

I will be running again tomorrow and do further testing.

Thanks

Dave

[dsnellen]

Further running has been better. I have a common ground for everything to include the BOB. A ground star is how Al referred to it. I still get random E-Stop and limit switch activation. Over thew weekend, it was quite often. Yesterday and today not so many. The probing runs fine so I am happy. Not sure what else to do to address the random switch activation. Thanks AL for all your help

Dave

[mike_Kilroy]

..Not sure what else to do to address the random switch activation...
Dave

Dave, relook at post 17?