Set the current for the plasma generator from the Plasmac

Hello,

I would like to ask whether it is still possible to transfer the current value from the cutting parameters to a plasma generator via a 0-10V analog output?
I have a Telwin Plasma 100 which can take the current strength via a 0-10V input.
According to the field description, this is not intended in plasmac. Is there a reason for that? Can it still be activated?

Many thanks.
Hermann

PlasmaC only uses the cut current if you have Powermax RS485 comms enabled.

You could use the associated HAL pin to do what you wanted, there are two pins available:

1. a float pin named plasmac_run.cut-current-f
2. a S32 pin named plasmac_run.cut-current-s

I think the OP has a 7I76E so you would link the float pin to spinout

net run_current plasmac_run.cut-current-f => hm2_7i76e.0.7i76.0.0.spinout

You would also have to enable the spindle output (this may be automatic if you are using spindle-on for plasma control already). in any case hm2_7i76e.0.7i76.0.0.spinena must be true for the analog out to work


and set the scale in the INI file
[SPINDLE_0]
OUTPUT_SCALE = 100
OUTPUT_MIN_LIMIT = 0
OUTPUT_MAX_LIMIT = 100

(This is assuming 10V = 100A and that plasmac_run.cut-current-f is scaled in Amps and a pncconf created hal/ini file set)

Thanks a lot, i will test it soon as possible.

PCW, thats a cool idea. I wonder how easy it would be to replace the current knob on a thermal dynamics with a digital pot controlled with the spindle?

rodw wrote: PCW, thats a cool idea. I wonder how easy it would be to replace the current knob on a thermal dynamics with a digital pot controlled with the spindle?

good idea but u will gain nothing

also i dont think 0-10v will be stable and amp stability important to control the arc density

rodw wrote: PCW, thats a cool idea. I wonder how easy it would be to replace the current knob on a thermal dynamics with a digital pot controlled with the spindle?

I don't know, it depends on whether the control potentiometer is just setting a DC voltage
If it is, it should work

taloot wrote:

rodw wrote: PCW, thats a cool idea. I wonder how easy it would be to replace the current knob on a thermal dynamics with a digital pot controlled with the spindle?

good idea but u will gain nothing

also i dont think 0-10v will be stable and amp stability important to control the arc density

Actually with the Telwin you gain something quite significant, the ability to change the current in real time

Why do you think the current control would be unstable? The 7I76E analog output stability depends
chiefly on the 10V supply stability (Whether or not you could replace the Hypertherms POT with a voltage
source remains unknown)

rodw wrote: PCW, thats a cool idea. I wonder how easy it would be to replace the current knob on a thermal dynamics with a digital pot controlled with the spindle?

I asked a friend about 8 months back to borrow his Cebora 150A plasma exactly for testing that, but he chickened out !

maybe that's helpful...