spindle leak

[Cruiser]

Debounce is a short cut & may not do what you want to do as it is Dependant on timing, so you can still have an error in that impossible place of the program that really piss's you off. SO ..... Fix the root cause of the problem !
Which usually is this, Each power supply to your system goes to + and - pins or connectors. Power systems include pc, 5v, 12v, & VFD. From one negative connector of an unused tap for each supply run a ground wire to chassis. This will have the effect of bringing ground potential for each down to a level which will stop the cross talk that is causing the issue. I fought all of this for a yr till I added the grounds and have reduced my debounces to nothing and have no issues any more. On mine the main culprit was the 12v VFD power which run to the spindle speed controller from the 5v x 12v supply and raising the ground potential of the circuit to a point that interfered with anything it could talk too, mainly the limits.
the plain and simple of it is, one neg point of each power system to chassis ground. It worked for me !

NONE of this ever was seen on any schematic for any part of the system from any body's product ! They all failed misserably till the ground was added in as an experiment on my part, this is what I am running now and it is "Stone Cold Quiet = ALWAYS"

[RustedOut]

the plain and simple of it is, one neg point of each power system to chassis ground. It worked for me !

NONE of this ever was seen on any schematic for any part of the system from any body's product ! They all failed misserably till the ground was added in as an experiment on my part, this is what I am running now and it is "Stone Cold Quiet = ALWAYS"

Good to hear this Don. There seems to be a lot said on the subject of isolated grounds in an cnc electrical system. That stuff went way over my head. But, I've been reading up for what seems like months on this very subject from the many posts that Al The Man has left on the CNC Zone in various threads and many other places from other people.

At first, due to my being electrically challenged, I wasn't getting the subtle hints he (Al) was making on the subject. Then I read one where he came out and directly said the same thing you're saying.

My system isn't quite to the point where I need to get all that done as I'm still doing the mechanical aspects of my IH mill conversion. But I intend to go ahead and tie my "-" connections to my star ground point when I get that far along. Well, that is the 5vdc for the CNC4PC C11G card and Gecko's and the 24vdc for the cooling fans.

Did you do the same with the larger power supply for the servos? I'm thinking yes is the answer as it makes sense to me, the electrically challenged. But what do I know on the subject, let me answer that one, nothing! Then, here is the one that has me stumped. The C11G manual says, in regard to the 12vdc power supply for spindle control through a vfd .

"Requirements:
It requires a +12VDC@ 20mA power supply to operate.
WARNING: To keep the output signals optoisolated, these must not
have common ground or connections to current with other circuits you
are using."

So, I'm thinking this one stands alone with no common ground. I intend to ask Arturo that question before powering up the mill for the first time, but haven't yet. Your thoughts?

And what about the green ground cables coming out of the servo motors? Back to the star ground as well even though the "-" cable already goes there?

Thanks
Bob

[Cruiser]

Rusted
The main power system for the servo motors through the gecko's is a separate system and not linked to the logic system (gotta call it something).
The green cable, if its the one I'm thinking of, goes back to the gecko's and then the power supply or closed circuit. An error here could weld your system. My power supply is over 70+vdc & the amps is limited by the geckos.
The logic system is where the conflict is found and it is anywhere that connections of any kind close to another potential gets influenced. It is the potential that is needing equalization in conjunction with grounding. I know I am not saying this correctly, It the outcome which we need, not so much the words. I view the STAR ground as concept rather than a rule of using one point within the system. My grounds are spread out over the chassis and the chassis is the point of ground which continues to the ground to earth at the main breaker panel. I am not using a breakout board as many are. I do use a smooth stepper. The BB I used was nothing more than a huge PITA ! Altho the grounds that I have since done may have eleviated the erratic and misbehaving system that I had. I looked at my debounce settings this afternoon and it is at 160. I did run a test a while back at zero with no problem and put the 160 value in just for measure.

[SWC]

Cruiser. I am not quite sure what you are refering to when you talk about this graound and that ground. is there any way that i can send you a picture so you can tell what to do? Thanks

[Cruiser]

SWC,
Did you understand the part of a negitive terminal from each power supply at a source ?
Ground is chassis !
I'll try for a pic, but it won't be pretty, my system is NOT fancy.

[Cruiser]

The pics didn't come out that well and it is only two of what I'm referring to. hope it helps understand what I am trying to describe. I used MS paint to put marks where they are at.

[SWC]

cruiser I think I understand. I will try to post a pic. I know i have alot of interference because my monitor is fuzzy looking. Thanks