Qtplasmac Control cutting current Ampers plasma cutter

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25 Oct 2023 18:44 #283822 by snowgoer540

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
The following user(s) said Thank You: tommylight, Clive S

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25 Oct 2023 21:57 #283827 by tommylight
Yeah, Phill mentioned he was working on something back in the days, but we never saw it in action...
Phill ?
:)

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25 Oct 2023 22:38 - 25 Oct 2023 22:46 #283829 by phillc54

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…
Last edit: 25 Oct 2023 22:46 by phillc54.

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26 Oct 2023 02:13 #283839 by rodw

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.

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26 Oct 2023 12:56 - 26 Oct 2023 13:03 #283864 by Plasmanfm
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
Last edit: 26 Oct 2023 13:03 by Plasmanfm.

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26 Oct 2023 18:07 - 26 Oct 2023 18:14 #283874 by Plasmanfm
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
Last edit: 26 Oct 2023 18:14 by Plasmanfm.

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26 Oct 2023 23:04 #283880 by phillc54

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...
 

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26 Oct 2023 23:11 #283881 by grijalvap
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.

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27 Oct 2023 00:51 #283884 by PCW
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
 
The following user(s) said Thank You: phillc54

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27 Oct 2023 11:23 - 27 Oct 2023 11:50 #283904 by Plasmanfm
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



 
Last edit: 27 Oct 2023 11:50 by Plasmanfm.

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