Denford Triac VMC with ATC Conversion / Fix

[Chaz]

Actually, I think I know why in the first instance. I need to get enable to work via the controller. Currently the DER (Drive Enable Relay - which cuts power to the drives), is hardwired as its 0V 'on'. That said, why is something controlling it (ie, giving it reference to move), when there is a fault? Some type of failsafe?

[Chaz]

And we have life, although the motor output is being set manually at the moment and still need to sort my machine runs X Y positive when controller resets.

[Chaz]

Ok, spindle now starts on M3 code. Progress.

[Chaz]

Not happy with the E Stop setup. Im currently using most of the original wiring but on 'reset' my X and Y still moves in the + directions. I then wired off the 24V switched to tell the CS Labs that the Emergency Stop was hit. This works but resetting is tricky.

I am going to remove the E stop setup in the current wiring mode and just wire it to the controller. Ill work another way to enable the drives.

[Boyan Silyavski]

I am basically deciding same stuff for my machine.

So i wired Estop to the servo drives not to the board. The board just enables the drives. So I hit the Estop and the drives stop instantly, they emit alarm signal that disables the board and puts all in reset condition. I reset from mach3 and board resets drives and enables them/ 2 different pins that go to relays/

What i am saying is that is ok for the board to have second circuit connected to the estop button, but its a must to stop the servos, so thats why servos usually have Estop and limit switch inputs, to react faster than boards.

[Gary]

The way it should be done is to have the Estop connected to an emergency relay that will cut off the AC going to the Servo drivers. The Servo drivers should have a DC supply that still powers the logic up, so when the estop is hit, even though the AC is dropped, the driver still knows where it is.
You can also have the Limits connected to the relay as well as the csmio.

[m_c]

I was going to say I never had any major E-Stop issues with my Denford Cyclone lathe (from what I've seen, Denford used a pretty standard E-stop setup across most of their machines), but then the KFlop allowed me a lot more flexibility in handling E-stops, and I added extra relays so the servo fault outputs triggered an E-stop. However to achieve clearing a drive fault situation, I had to use a custom program in the KFlop that clears the E-stop signal, then waits for all the drives to exit fault status before resuming normal business.
I used Kinco servos from Zapp, which allowed me to configure inputs/outputs how I wanted them to work, but I'm not sure what drives you're using, or what timing sequence they need.
.
I'm guessing your problem is the Drive Enable/Drive Fault timing once you're into an e-stop?
Your DER should be connected to a Drive Enable output from Mach3, so unless Mach is active, nothing should move. Simplest option may be to add an override push button to disconnect the drive fault input and/or trigger the drive reset so you can fool Mach into exiting an e-stop, and get the drives back online/out of fault.