Probing. Auto search Z=0

[Michael-Yurov]

Probing. Auto search Z=0

Hello.

I am sorry if I repeat a question.
I Russian therefore it is difficult to me to find information about my problem on this forum.

I want to write a script which will find the zero plane.
I made a touch plate and connected electric part.
Plate thickness - 1,535 mm.
I want that after a contact the script changed Z coordinate for 1,535 mm. But I don't know how to make it :-(

I wrote script:

#include "KMotionDef.h"

main()
{	Jog(2,-2000);         // start moving
	while (ReadBit(15)) ; // wait for switch (input #15) to change
	EnableAxisDest(2, 1473.6);  // Set Z to 1.535 mm (960 steps/mm)
	Jog(2,0);		      // stop
	Move(2,4800); 		  // Move to Z=5 mm (960 steps/mm)
}

But it changes machine coordinates of system, but not working coordinates.

What I do incorrectly?
Help me to write the correct script please.

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[TomKerekes]

Hi Michael-Yurov,

Do you want to run this from a GCode program or a User Button?

How about trying it this way?

See the code below. Assign it to M Code M100. Configure it with option Exec/Wait/Sync. It will not change the Machine Coordinates but after it finishes the tool should be at a physical height of 5mm. So then use G92 to set the Program Coordinates to Z of 5mm. So code in GCode:

M100
G92 Z5


#include "KMotionDef.h"

#define TO_CNTS 960.0
#define BLOCK_HEIGHT 1.535
#define FINAL_HEIGHT 5.0

main()
{

Jog(2,-2000); // start moving
while (ReadBit(15)) ; // wait for switch (input #15) to change

// sample the counts where we at the touch block height and
// since we know what that height is compute where to move
// in counts so we will be at the desired final height
Move(2,ch2->Dest + (FINAL_HEIGHT-BLOCK_HEIGHT)*TO_CNTS);
while (!CheckDone(2)) ; // wait till finished

}


Regards

[Michael-Yurov]

TomKerekes, many thanks!
I will try it tomorrow.
I think, it will suit me.

But, how to write a script if I want to start it by the user button?
How I can execute the G92 Z5 command in a script?

Maybe I can find it in examples?