New Project with Mesa 7I96 and THCAD-05

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26 Jul 2021 23:42 #215996 by acourtjester
THCAD freq numbers for each

THCAD-10
0 volts == 123.0 K
10 volts – 946.8 K

THCAD -5
0 volts == 138.3 K
5 volts == 966.4 K

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26 Jul 2021 23:48 - 26 Jul 2021 23:50 #215997 by rodw

If you use PnCconf on an existing config and add an arc voltage enoder it will put the required scale and offset values in a file ending in "new" in the config directory.
I'd rather not confuse Tom at this stage. We can tell him what the values should be.

Tom, also in your ini file
MAX_VELOCITY = 35
MAX_ACCELERATION = 17
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 44
STEPGEN_MAXACCEL = 22
Make sure STEPGEN_MAXVEL and STEPGEN_MAXACCEL should be double the values above. ie.   for JOINT-0
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 25
STEPGEN_MAXACCEL = 100
Last edit: 26 Jul 2021 23:50 by rodw.

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26 Jul 2021 23:52 #215998 by phillc54
Well I was just saying that the values are already calculated and in a file...

Why double the stegen values when not using backlash compensation, I have never found the need for that.
 

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27 Jul 2021 00:00 #215999 by rodw

Well I was just saying that the values are already calculated and in a file...

Why double the stegen values when not using backlash compensation, I have never found the need for that.

 

Yeh, I stuffed up there and the forum makes it too hard to edit.
This should be correct though
MAX_VELOCITY = 35
MAX_ACCELERATION = 17
# The values below should be 25% larger than MAX_VELOCITY and MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100% larger.
STEPGEN_MAXVEL = 44
STEPGEN_MAXACCEL = 22

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27 Jul 2021 00:03 #216000 by acourtjester
I had been told to set the Hypertherm to a 30 to 1 divider settings.  On the calculations site it will except a 50 to 1 setting can that divider setting be used.  I would not need to open up the Plasma unit to make the change.
 
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27 Jul 2021 00:10 #216002 by rodw
You need to whatever is set inside your plasma cutter in the calculator. What is it set at? 20:1 is a good setting if your machine accepts it.
The custom.hal file seems to be set up right right for ohmic sensing

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27 Jul 2021 00:42 #216003 by acourtjester
Thanks for the files I will use them in the morning, sending the files is a great help as my head is spinning due to my lack of knowledge.

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27 Jul 2021 21:43 #216070 by acourtjester
Thanks you so much with the files you changed and adding the Arc Voltage offset and scale I now see the voltage registering on the main screen.  With the 50 to 1 and a 9 volt battery it showed 450.    Ohmic sensor does not show any action on screen or in Hal show.  does it need a offset value to be entered like the arc voltage did??
I read you can copy the SheetCam tools into the LinuxCNC materials files, if true how do I do it.  I have the file for the tools I used and it would be nice to just copy them over.
I have said thanks before but I cannot say how much I appreciate the help you have given this rookie with LinuxCNC.  I feel I am very close to making sparks with the new table.
 
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27 Jul 2021 23:20 - 27 Jul 2021 23:45 #216078 by snowgoer540
You do not have ohmic probe checked on the GUI (I did this same thing myself this evening), so I wouldn’t expect ohmic probe to work at this point :) give that box a check and report back.  

 
Last edit: 27 Jul 2021 23:45 by snowgoer540.

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27 Jul 2021 23:22 #216079 by phillc54
The float switch is connected to:
hm2_7i76e.0.7i76.0.0.input-11
so check that pin with Halshow.

There is an offset for the float switch in the parameter tabe but that is just to get the coerrect height when you do the probe test set up.
linuxcnc.org/docs/devel/html/plasma/qtpl...tml#qt_initial-setup

The material importer is here:
linuxcnc.org/docs/devel/html/plasma/qtpl...#_material_converter

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