Re: e-stop sceme

Jeff ,
Thanks... Yes I would like tom see what you did. I have to say the
pictures of your mill are quite impressive. It sounds like you have
thought this though and have a good solution.
Take care
Mike Bush

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "washcomp" <jeff@w...> wrote:
> Mike:
>
> I'll be happy to email you the file tomorrow (it's on my office
> computer). Is JPG format OK or do you preffer Visio?
>
> If I should be cutting other lines to protect the drives, someone
> please let me know. I have a drain resistor on the power supply
> capacitor, but when I hit E-Stop, I'm currently only cutting the AC
> side of the transformer. Should I throw some relay contacts in to
> cut the DC side as well? Any preference as to which to cut first?
> I can redesign the circuit pretty easily to let the E-Stop mushroom
> kill anything (or everything for that matter), just would like to
> know what to cut.
>
> My E-Stop (on manually pushing Stop button or table hitting limit
> switch) currently cuts the the AC feed to the stepper motor power
> supply transformer (stopping the motors from turning), cuts the
> motor controler of the Bridgeport and applies the pneumatic brake.
> It also sends a signal through the breakout box to disable the
> step/dir feed from Mach 1/2.
>
> To start machine, the "Start" button must be pushed.
>
> Regards,
> Jeff
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "zbushz" <mbush@l...> wrote:
> > Jeff,
> > I looked at your photos... Nice work. I can't quite read the
> diagram.
> > The photo is small and if I enlarge it the print detail goes. My
> first
> > question in this e-stop question is what is the best way to shut
> off
> > power. I can imagine having relays on the ac to the breakout board
> and
> > the dc power in and cutting both with the "big red mushroom". It
> would
> > be good to tell the software what has occured, though maybe not
> > nessasary(this is an emergency). Will this hurt the drives? Marris
> > has a file that cuts off the AC to the power supply then dumps the
> > capacitor( this is in the files section of cced, DC brush
> servodrive
> > E-stop). Is this the best way or can I use a switch(contactor) at
> the
> > dc input. I may use a 220 VAC power supply. It seems to me that
> Marris
> > suggested shuting off the ac then the dc ...can I shut off both at
> > once without harming the geckos. There haas been much disscussion
> > about e-stop but not much practical information.
> > Thanks
> > Mike Bush