THC config that works.

@Tothwelding,

Your proma download files from proma poland, you can extract them and put them in your config folder.

Here are the files :


Okey then extract the folder in your linuxcnc config directory see picture :



If you now startup linuxcnc, you can select this configuration and make a shortcut startup copy to your desktop.

Select your toma thc desktop icon and it would not start. :laugh: if you are connected to production machine.
You need to change some port settings in the parport.hal, and i think also thc.hal in the middle of the file.
You only have to invert some port settings. (high-low invert, Toma has explained this carefully in the file)

Good luck. Remind : invert pins to get them low. You don't have to delete parts, only delete # or add #
Toma works fine.

Be aware of the Toma program sequence. When at plasma start place, the program is measuring the plate height with sensor. If sensor is triggered, then z axis is stop moving. So be aware that the height measure sensor is connected, otherwise your z axis
will spin endless.

The toma thc is a masterpiece of code. It is done by professor toma i think.

bubels wrote:
I have found the solutions:

in stepper.hal

line:
#setp stepgen.2.maxvel [AXIS_2]MAX_VELOCITY

We need to remove #

That is the solution for anyone who has joint limit errors. This has to be removed in the stepper.hal file.
Also attached the edited file to the original post.

Hi all.
Is there a way to get this system to run using a z-home (top of z axis travel) as well as a float switch, or is it necessary to disconnect the home for the thc to work?
many thanks,
andy

Hi Andy,

I never used a z home sensor on a plasma machine. I think you have to use the Toma code as it is now.
Less is more.

You can use the Z home but normally it will not work as the homing is already implemented in hal and can be set in the ini file at what height you want it. Since the search for the material is automated, homing is just to set a safe initial height, after that all the G0 moves are governed by the "travel height" set in the Axis GUI at the right side.

So I should set the home offset in the ini file to be roughly the height of the z-axis top above the material, and disable the z-home switch connections in the hal files?

I couldn't see this info anywhere in this thread, but found the travel height and switch travel settings in the xml file, is that right?
many thanks
a