Useful Plasma Thread
15 Aug 2018 20:46 #116097
by rodw
Replied by rodw on topic Useful Plasma Thread
Welcome to the world of floats! You can never depend on the equality operator, you have to see how close they are to each other and if within a small range, treat them as equal.
Borrowing from the near component
github.com/LinuxCNC/linuxcnc/blob/master...components/near.comp
You could write a procedure like thisNote the first if() statement is there to make sure that in1 values is positive if they are negative so the subtraction will work properly
and then you could replacewith:
As far as saving screen values, there is an example in plasma.py in this gmoccappy sim
github.com/LinuxCNC/linuxcnc/blob/master...apy_plasma/plasma.py
But here is a Python example that reads and writes to an .INI file from an application I've written to connect with a web based application and print to a label printer. Python is a bit different from C and requires that global variables are defined in the procedure that accesses them.
and the ini file
Its great to see you are cutting! Like anything the more you use it the easier it becomes C is no different so you can only improve!
Borrowing from the near component
github.com/LinuxCNC/linuxcnc/blob/master...components/near.comp
You could write a procedure like this
int near(double in1, double in2, double range)
{
if(in1 < 0) {
in1 = -in1;
in2 = -in2;
}
if(fabs(in1-in2)<= range)
return 1;
else
return 0;
}and then you could replace
(int)Offset == (int)Axis_z_eoffset)if(near(Offset ,Axis_z_eoffset,0.0001)){
// do something
}As far as saving screen values, there is an example in plasma.py in this gmoccappy sim
github.com/LinuxCNC/linuxcnc/blob/master...apy_plasma/plasma.py
But here is a Python example that reads and writes to an .INI file from an application I've written to connect with a web based application and print to a label printer. Python is a bit different from C and requires that global variables are defined in the procedure that accesses them.
import ConfigParser
from ConfigParser import ConfigParser
def readConfig():
global g_zpl
global g_filename
global g_printer
global g_apiurl
global g_apikey
global g_csvname
global g_uselpr
global g_lpripaddr
global g_lprport
global config
try:
config = ConfigParser()
config.readfp(open('zebra1.ini'))
config.sections()
g_printer = config.get('PRINTER', 'queue')
g_filename = config.get('PRINTER', 'label')
g_csvname = config.get('PRINTER', 'lastcsv')
g_apiurl = config.get('API', 'URL')
g_apikey = config.get('API', 'KEY')
g_lpripaddr = config.get('LPR', 'ipaddr')
g_lprport = config.get('LPR', 'port')
g_uselpr = config.get('LPR', 'uselpr')
except:
tkMessageBox.showwarning("Warning","Cannot Open INI file, check settings before printing")
def writeConfig():
global g_zpl
global g_filename
global g_printer
global g_apiurl
global g_apikey
global g_csvname
global config
global g_uselpr
global g_lpripaddr
global g_lprport
config.set('API', 'key', g_apikey)
config.set('API', 'url', g_apiurl)
config.set('PRINTER', 'lastcsv', g_csvname)
config.set('PRINTER', 'label', g_filename)
config.set('PRINTER', 'queue', g_printer)
config.set('LPR', 'ipaddr', g_lpripaddr)
config.set('LPR', 'port', g_lprport)
config.set('LPR', 'uselpr', g_uselpr)
try:
with open('zebra1.ini', 'wb') as configfile:
config.write(configfile)
except:
tkMessageBox.showwarning("Warning","Cannot write to INI file")and the ini file
[PRINTER]
queue = Zebra S4M (203 dpi) - ZPL
label = C:/Users/Rod/Documents/Python/102x36prod.zpl
lastcsv = C:/Users/Rod/Documents/Python/labelCR1.csv
[API]
url = https://www.yourdomain.com/do/WS/NetoAPI
key = xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
[LPR]
ipaddr = 192.168.1.34
port = 9100
uselpr = 1Its great to see you are cutting! Like anything the more you use it the easier it becomes C is no different so you can only improve!
The following user(s) said Thank You: Grotius
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16 Aug 2018 21:57 - 16 Aug 2018 22:00 #116185
by Grotius
Replied by Grotius on topic Useful Plasma Thread
Hi Rod,
This evening i had something strange going on.
The section normal in the end of the code is not working. Is there a limitation in code or if sub statements?
Hmm.
The program is not going to execute this paragrapf :
if(Normal){ // normal plasma cutting, without probe function.
The enable and probe functions are working good, so i don't understand how this can happen?
Its a short sample code, so i can trigger if its works...
This evening i had something strange going on.
The section normal in the end of the code is not working. Is there a limitation in code or if sub statements?
Hmm.
The program is not going to execute this paragrapf :
if(Normal){ // normal plasma cutting, without probe function.
The enable and probe functions are working good, so i don't understand how this can happen?
Its a short sample code, so i can trigger if its works...
component THC2 "Torch Height Control for stepper and servo machines, compatible with external offset branche";
description
"""
//Must add probe distance function.
""";
author "Grotius CNC Machines";
license "GPLv2 or greater";
option singleton yes;
// Input Pins
pin in bit Enable "Enable component";
pin out bit Reset_offsets "Reset offsets to orginal condition when component is not enable";
pin in float Zpos_in "";
pin out float Zpos_out "";
pin in float Travelheight "Z axis travelheigt in";
pin in float Cutheight "Z axis cut height in";
pin out float Maxspeed "Z axis speed out 0 to 100, for info only";
pin out float ProbeSpeed "Z axis probing speed";
pin out float Speed "Z axis current speed, for info only";
pin in float Piercespeed "Z axis pierce speed in 0 to 100.";
pin in float Piercedelay "Z axis pierce delay time in seconds";
pin out bit Piercetime_reached "Piercetime reached";
pin in float Up_down_resolution "When Torch up, then correction 0.1mm or 1mm resolution";
pin in float Axis_z_eoffset "Connectod to external offsets z real time current z axis position input";
pin in float Pierceheight "the pierce height value in mm";
pin out float Offset "Z axis Offset command to external offsets, the z axis is moving to this offset when set, even in pause";
pin in bit Torch_on_in "Connected to spindle-cw";
pin in bit Probe_enable "Connected to user interface button";
pin in bit Normal "Test pin";
pin out bit Probe_trigger "If probe is triggered this pin becomes high";
pin out bit Cutting_trigger "At cutheight and cutting";
pin in float Probe_search_limit "Connected to user interface input, z axis probe end limit. For example Z -10 = probing to max Z-10.";
pin in float Probe_switch_offset "Probe sensor switch correction value, positive z-value";
pin out float Zpos_probe "Z value when probe was triggered";
pin in float Restart_attemps "3 for example";
pin in bit Arc_ok_in "Parport connections in 12";
pin in bit Torch_up "Parport connections in 13";
pin in bit Torch_down "Parport connections in 11";
pin in bit Probe_in "Parport connections in 15";
pin out bit Torch_on_out "Parport connections out 17";
pin out bit Pause_machine "Connect to motion.feed-hold-inhibited";
//pin out float Zpos_cmd_out ;
variable double time;
variable float Count;
function _;
;;
#include "rtapi_math.h"
#include "stdlib.h"
#include "stdio.h"
FUNCTION(_) {
Zpos_out = Zpos_in;
if(!Enable){
Reset_offsets = 1;
Offset = 0;
Probe_trigger = 0;
Torch_on_out = 0;
Piercetime_reached = 0;
time = 0;
Pause_machine = 0;
}
if(Enable){
if(!Torch_on_in){
Torch_on_out = 0;
Offset = Travelheight;
Cutting_trigger = 0;
Count = 0;
}
if(Torch_on_out){time += fperiod;}
if(time >= Piercedelay){ Piercetime_reached = 1;}
if(!Torch_on_in){time = 0; Piercetime_reached = 0;}
Reset_offsets = 0;
}
if(Probe_enable){
if(!Torch_on_in){
Probe_trigger = 0;
Piercetime_reached = 0;
Cutting_trigger = 0;
Offset = Travelheight; //goto travelheight...
}
if(!Torch_on_in && ((int)Offset == (int)Travelheight) ){
Pause_machine = 0;
}
if(!Torch_on_in && !((int)Offset == (int)Travelheight) ){ //if m5 do not move xy, until at travelheight
Pause_machine = 1;
}
if(Torch_on_in && !Probe_in && !Probe_trigger){
Offset = Probe_search_limit;
Pause_machine = 1;
}
if(Torch_on_in && Probe_in){
Zpos_probe = Axis_z_eoffset;
Probe_trigger = 1;
Pause_machine = 1;
}
if(Torch_on_in && Probe_trigger){
Offset = Zpos_probe + Pierceheight + Probe_switch_offset;
Pause_machine = 1;
}
if(Torch_on_in && Probe_trigger && ((int)Offset == (int)Axis_z_eoffset) ){ // moving to pierceheight, if at height, ok
Torch_on_out = 1;
Pause_machine = 1;
}
if(Torch_on_out && Piercetime_reached){
Offset = Zpos_probe + Cutheight + Probe_switch_offset; // moving to cutheight
Pause_machine = 1;
}
if(Torch_on_in && Piercetime_reached && ((int)Offset == (int)Axis_z_eoffset) ){ // if at cutheight, move
Cutting_trigger = 1;
Pause_machine = 0;
}
if(Torch_up && Torch_on_out && Cutting_trigger && (Axis_z_eoffset <= Travelheight) ){ // torch up and limited to travelheight
Offset = Axis_z_eoffset + Up_down_resolution ;
Pause_machine = 0;
}
if(Torch_down && Torch_on_out && Cutting_trigger && (Axis_z_eoffset >= Probe_search_limit) ){ // torch down and limited to probe search limit
Offset = Axis_z_eoffset - Up_down_resolution ;
Pause_machine = 0;
}
if(!Torch_down && !Torch_up && Torch_on_out && Cutting_trigger){ // if no torch up or down, stay at current height
Offset = Axis_z_eoffset;
Pause_machine = 0;
}
if(Torch_on_in && Piercetime_reached && Cutting_trigger && Arc_ok_in){ // if arc oke, move
Pause_machine = 0;
}
if(Torch_on_in && Piercetime_reached && Cutting_trigger && !Arc_ok_in){ // if lost arc oke, halt turn of torch and restart 1 time
Pause_machine = 1;
// if(Count <= Restart_attemps){ // restart
// Torch_on_out = 0;
// Torch_on_out = 1;
// Count = Count + 1;
// }
}
}
if(Normal){ // normal plasma cutting, without probe function.
if(!Torch_on_in){
Offset = Travelheight;
Cutting_trigger = 0;
Pause_machine = 0;
}
if(Torch_on_in && !Cutting_trigger){
Offset = Pierceheight;
Pause_machine = 1;
}
if(Torch_on_in && ((int)Axis_z_eoffset == (int)Pierceheight) ){
Pause_machine = 1;
Torch_on_out = 1;
Offset = 0; // it wil not go to zero....
}
}
}
Last edit: 16 Aug 2018 22:00 by Grotius.
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16 Aug 2018 22:06 #116187
by rodw
Replied by rodw on topic Useful Plasma Thread
You have not actually done anything to change the state of normal after its defined. When a variable is defined, its usually undefined or zero filled by the compiler so its currently always not normal (!normal)
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16 Aug 2018 22:09 #116188
by rodw
Replied by rodw on topic Useful Plasma Thread
sorry, I just looked in the code at my last post and forgot to look for a pin.
So is the Normal pin connected?
Can you see it change state in Halshow?
What is it connected to?
So is the Normal pin connected?
Can you see it change state in Halshow?
What is it connected to?
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18 Aug 2018 09:22 #116235
by Grotius
Replied by Grotius on topic Useful Plasma Thread
Hi Rod,
Yes it is connected and working in halshow. I will search for the problem today.
Yes it is connected and working in halshow. I will search for the problem today.
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18 Aug 2018 09:48 #116237
by rodw
Replied by rodw on topic Useful Plasma Thread
Very strange. Check your {} in case you have a misplaced brace in your code.
Try adding a debug output pin that is only set to true in that conditional block. eg.
Then review in Halshow
Try adding a debug output pin that is only set to true in that conditional block. eg.
int debug_test = 0;
if(Normal){
debug_test = 1;
}
debug_output_pin = debug_test; // at the very end of the componentThen review in Halshow
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18 Aug 2018 10:16 - 18 Aug 2018 10:16 #116238
by rodw
Replied by rodw on topic Useful Plasma Thread
Also try setting Normal to a default
Maybe also use a temporary variable
Its possible that the conditional test does not like a bit type (non-native to C) so by forcing it to a int with an implicit typedef might fix it.
pin in bit Normal = 0 "Test pin";Maybe also use a temporary variable
int NormalMode = (int) Normal;
if(NormalMode){
// Do StuffIts possible that the conditional test does not like a bit type (non-native to C) so by forcing it to a int with an implicit typedef might fix it.
Last edit: 18 Aug 2018 10:16 by rodw.
The following user(s) said Thank You: Grotius
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18 Aug 2018 10:31 - 18 Aug 2018 10:32 #116241
by Grotius
Replied by Grotius on topic Useful Plasma Thread
Hi Rod,
Problem is solved. It was a double command involved in the enable function.
So today i can write the rest of the code for normal cutting without probe function.
Problem is solved. It was a double command involved in the enable function.
So today i can write the rest of the code for normal cutting without probe function.
Last edit: 18 Aug 2018 10:32 by Grotius.
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18 Aug 2018 10:51 #116244
by rodw
Replied by rodw on topic Useful Plasma Thread
Great work!
The following user(s) said Thank You: Grotius
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18 Aug 2018 14:10 #116248
by Grotius
Replied by Grotius on topic Useful Plasma Thread
Hi Rod,
I show you a piece of code that works good when normal cutting without using the probe function.
I tested this code on a test board next to my pc.
It was hard to solve the float issue's. Turning them into integer, was not a good idea.
Now i used the orginal float value's and added a min and max difference of 0.1mm in the same code line. This works good !
And this 0.1 value is only to compare the different float's.
Usage with Mesa, will also be easy in this code example. If you have the raw input voltage for example
120 volts. And we know our torch destination voltage for example 130 volts (from cutting charts). If we then do the Torch_up signal, the torch is moving up and when reached 130 volts, we are finished.
So i can write a short code with a mesa raw arc voltage / encoder input. Do you think this is usable for you?
If handy, i can make a gmocappy load in side screen to test the code by other users, when i am finisched.
I show you a piece of code that works good when normal cutting without using the probe function.
I tested this code on a test board next to my pc.
It was hard to solve the float issue's. Turning them into integer, was not a good idea.
Now i used the orginal float value's and added a min and max difference of 0.1mm in the same code line. This works good !
And this 0.1 value is only to compare the different float's.
Usage with Mesa, will also be easy in this code example. If you have the raw input voltage for example
120 volts. And we know our torch destination voltage for example 130 volts (from cutting charts). If we then do the Torch_up signal, the torch is moving up and when reached 130 volts, we are finished.
So i can write a short code with a mesa raw arc voltage / encoder input. Do you think this is usable for you?
If handy, i can make a gmocappy load in side screen to test the code by other users, when i am finisched.
if(Normal){
if(!Torch_on_in){
Offset = Travelheight;
Pause_machine = 1;
Torch_on_out = 0;
Cutting_trigger = 0;
}
if(!Torch_on_in && ( (Axis_z_eoffset >(Travelheight-0.1)) && (Axis_z_eoffset <(Travelheight+0.1)) ) ){ // if no torch on in goto travelheight.
Pause_machine = 0;
}
if(Torch_on_in && !Torch_on_out){ // if torch on in goto pierceheight.
Offset = Pierceheight;
Pause_machine = 1;
}
if(Torch_on_in && !Torch_on_out && ( (Axis_z_eoffset > (Pierceheight-0.1)) && (Axis_z_eoffset <(Pierceheight+0.1)) ) ){ // if at pierceheight.
Torch_on_out = 1;
Pause_machine = 1;
}
if(Torch_on_in && Torch_on_out && Piercetime_reached){ // if torch on in and piercetime oke, goto cutheight.
Offset = Cutheight;
Pause_machine = 1;
}
if(Torch_on_in && Torch_on_out && Piercetime_reached && ( (Axis_z_eoffset >(Cutheight-0.1)) && (Axis_z_eoffset <(Cutheight+0.1)) ) ){ // add ark ok signal
Pause_machine = 0;
Cutting_trigger = 1; // we are cutting
}
//if(Torch_on_in && Torch_on_out && Piercetime_reached && ( (Axis_z_eoffset >(Cutheight-0.1)) && (Axis_z_eoffset <(Cutheight+0.1)) ) && !Ark_ok_in) {
// Pause_machine = 1;
// Torch_on_out = 0;
// }
if(Torch_up && Torch_on_out && Cutting_trigger && (Axis_z_eoffset <= Travelheight) ){ // torch up and limited to travelheight
Offset = Axis_z_eoffset + Up_down_resolution ;
Pause_machine = 0;
}
if(Torch_down && Torch_on_out && Cutting_trigger && (Axis_z_eoffset >= Probe_search_limit) ){ // torch down and limited to probe search limit
Offset = Axis_z_eoffset - Up_down_resolution ;
Pause_machine = 0;
}
if(!Torch_down && !Torch_up && Torch_on_out && Cutting_trigger){ // if no torch up or down, stay at current height
Offset = Axis_z_eoffset;
Pause_machine = 0;
}
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