Gscreen - a GTK / Glade / Python based screen

the way i have it working here John , is that the Estop will toggle machine power to off on activation also
and needs then the gui to be set active again before continuing , my thoughts are to have an additional led next to the Estop led which shows machine on so you can instantly see either the machine on status and Estop Status together
i.e 2 greens and your cooking on gas ! , one red one green and your goose is cooked , or someones hit the Estop etc

I think a following error on an axis will cause a machine off, but not affect estop. Also, a tool change component I wrote has an enable input (no tool changer motion unless it's true), and I wired it to machine-on.

Karl

cmorley wrote:

Is this functionality needed? I could not think of a need to have the machine out of estop but machine off, so I combined them.
It's easy to have them separate if there is a good reason.

It's a corner-case, but if you have motors that need to home themselves (bldc + enccoders) then you can use the fact that f-errors are not raised with the machine off to sequence the motor homing.
(the on-button starts the home sequence, then the homing sequence turns on emc2 when finished)
E-stop kills the power, so precludes this.

Andy
yes i was thinking having the machine on button start the homing sequence if not homed already .
but also looking at the possibility if someone hit the on button , and the machine was in a state of danger , last thing we need is a table shooting at full tilt
so perhaps on selecting machine on , a unhomed led , to alert user to initalise homing before continuing may be a better solution

Karl
yes a follow error to go to machine off status , so this can be restarted by selecting machine on again and possibly rehome sequence , due to the fact that a follow error would have resulted in lost position , so rehome

On a stepper machine with no feed back - this might be a true statement. On a closed loop servo or stepper machine (where emc closes the position loop using something like encoder feedback) a following error will not cause loss in position. Neither will an estop.

sam

cncbasher wrote:

Karl
yes a follow error to go to machine off status , so this can be restarted by selecting machine on again and possibly rehome sequence , due to the fact that a follow error would have resulted in lost position , so rehome[/quote]

cncbasher wrote:

the way i have it working here John , is that the Estop will toggle machine power to off on activation also
and needs then the gui to be set active again before continuing , my thoughts are to have an additional led next to the Estop led which shows machine on so you can instantly see either the machine on status and Estop Status together
i.e 2 greens and your cooking on gas ! , one red one green and your goose is cooked , or someones hit the Estop etc

If I had a dollar for every time an accidental push of the E-Stop had the machine off with no indication I'd have 10 or so bucks... some kind of indication that an E-Stop is in is a big help.

John