Qtplasmac Control cutting current Ampers plasma cutter

grijalvap wrote:

related to this it has been in my mind for long time if we can make a sort of plasma controller that emulate the Hyperterm modbus, then we can use the PMX485 component to talk to it, may be using a arduino. 

Thanks be to Phill:

github.com/phillc54/pmx485

Yeah, Phill mentioned he was working on something back in the days, but we never saw it in action...
Phill ?

grijalvap wrote:

No sure if the plasma response will be fast enoug, but for sure this would be an interesting test to do.
related to this it has been in my mind for long time if we can make a sort of plasma controller that emulate the Hyperterm modbus, then we can use the PMX485 component to talk to it, may be using a arduino.

 
This may be a possible starting point:
github.com/phillc54/pmx485

Edit: Oops, I am on my phone and didn’t see the previous two posts. Stupid old eyes…

grijalvap wrote:

No sure if the plasma response will be fast enoug, but for sure this would be an interesting test to do.
 

Should be pretty quick as its a 0-10 v control, not slow modbus commands as used ny the XP45's et al.

hallo phillc54
where do I have to insert the hal pins?
In order to understand the system better, I would like to the amps of the material list displayed in volts displaye for experimental purposes
where change something?

King regarde and thank´s
Juergen

hallo phillc54
I've worked on it a bit
I am with net qtplasma.cut_amps-f =>hm2_7i96s.0.pwmgn.00.value
on the right path?

king regarde and thankˋs
juergen

Plasmanfm wrote:

hallo phillc54
I've worked on it a bit
I am with net qtplasma.cut_amps-f =>hm2_7i96s.0.pwmgn.00.value
on the right path?

 

It seems good to me, sorry but I am no help to you on the PWM side of things...
 

Ok It seems like you are going to use the PWM instead of spindle(never used the pwm) but i think you will ned a sort of signal conditionig 
to make the pwm meets the current value, so may be you need to scale the current acording the PWM output.

in my humble opinion use the spindle control is easiest and straigth forward.

Yes, probably something like your:

qtplasma.cut_amps-f =>hm2_7i96s.0.pwmgen.00.value
 

with scale set:

setp hm2_7i96s.0.pwmgen.00.scale 65

(if 65 A is full scale)

and frequency set for the 7I96S:

setp hm2_7i96s.0.pwmgen.pwm_frequency 20000

In addition

hm2_7i96s.0.pwmgen.00.enable needs to be connected to some signal,

perhaps the torch-on signal
 

Halo pcw
So I'm a little further along again
When I use volt it works like this:
net Plasmas:cut-volts => hm2_7i96s.0.pwmgn.00.value
If I net Plasmas:cut-amps => hm2_7i96s.0.pwmgn.00.value
I got the error: pin not found
That's right, I don't have a pin with the names in plasmac
how can I add this to plasmac?


King regarde and thank‘s
juergen