more on estop switches (was Re: Advice needed

Dave,

Feedhold stops(red button, momentary action), Cycle start begins
(green button, momentary action)... Common on nearly every commercial
control.

Cycle start is used for restarts after many types of "stops".
Including optional stops coded in the toolpath.

Hope this helps,

Ballendo

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude
<davemucha@j...>" <davemucha@j...> wrote:

> Hi Ballendo,
>
> I have end switches, these are hard off, kills Gecko's (#7 pin).

not

> quite as elaborate as your setup, but I am not controlling spindle

as

> it is for a drill press. (I'm doing some heavy maintence and up-
> grades and will add spindle control in the next few weeks)
>
> I am putting M00 so I can set the M00 where the desired number of
> holes are drilled. then pause to change tool. this is program
> originated.
>
> Under Dave K's recommendation, I'm adding M70's in a multitude of
> places and putting a switch on the table for a manual pause. Since
> the M70 will finish the current line, then pause, it allows the

stop

> to be at the top of the drill cycle as it passes from drilling to
> moving to the next spot. This pause would be good for chip
> clearance, tool inspection, tool change etc. These are user
> originated.
>
> E- does stand for emergency, but the question comes up about
> something like a 'pause program immediately', but not lose your

place

> and allow a resume.
>
> I am lucky enough to have a friend let me use his Bridgeport CNC to
> make some stepper brackets and love the rigidity of the machine.

I'm

> putting single pass circles in 1/2 thick aluminum.
>
> The pendant holds the program sent from the PC, and allows a soft
> stop, or freeze if you will, then it allows a resume. I think

this

> is a feature many people want as it comes up often enough.
>
> I will want it on my PCB etcher (Since getting the T-tech that
> project is low priority) as if I see some sort of problem mid

program

> and want to check something, but may not want to abort. I don't

know

> if you have cut a PCB, but you would not want to re-start if there
> was any other way.
>
> E stands for emergency, and that should not be changed. unlike

auto

> speed limits that mean 'kinda-sorta-close to this speed... if you
> feel like'. Limit in our sense would also be a textbook

definition,

> up to but no further.
>
> Seems like we need that pause or Freeze in addition to the E-stop

as

> that is what a lot of us home-brew would use.
>
> Dave
>
>
> BTW,
>
> Here is the Servo url
> http://www.servoproductsco.com/cnc2.htm
>
> Here are the Servo G-codes (2 pages)
> http://www.servoproductsco.com/tips_pdf/80849_focus-
> on_servo_cnc_codes_&_formats.pdf
>
> (probably should have posted those on the other thread)
>
>
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> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "ballendo <ballendo@y...>"
> <ballendo@y...> wrote:
> > Dave,list,
> >
> > Most safety standards REQUIRE that the estop NOT be momentary...
> >
> > That is why most switches sold as estop require turning the face

of

> > the knowb to reset. Older switches could be pulled out, but newer
> > safety regulations have made these obsolete on comemrcial

equipment.

> >
> > Hope this helps,
> >
> > Ballendo
> >
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude
> > <davemucha@j...>" <davemucha@j...> wrote:
> > <snip>
> > >also, the e-stop is not required to be a momentary. as long as

it

> > >is open the units will not run. so it could be a hard off.