Machsupport Forum

Mach Discussion => Mach4 General Discussion => Topic started by: jpbomber on June 03, 2023, 08:26:31 AM

Title: Laser pointer, offset X-Y and set zero but whitout moving the tool incremental
Post by: jpbomber on June 03, 2023, 08:26:31 AM

Hello guys,

I use a laser pointer (precise enough for my need) to set my X and Y origin, I know I can move X 3.00 and  Y 4.00 incremental and set the zero for G54 X and Y. But sometimes, I can't move because my tool will contact the part (4 axis head)

So, I'd love to create a script that once I lined up the laser with my mark for the X and Y origin, the script would note the actual machine position for the x and y value, add the 3.00 for the X and add 4.00 for Y and set the result as the zero position for G54 X and Y

Thanks a lot guys for the help!

Title: Re: Laser pointer, offset X-Y and set zero but whitout moving the tool incremental
Post by: joeaverage on June 04, 2023, 06:28:35 AM

Hi,
yes, thats pretty straight foward, I'd use this API:

Code: [Select]

LUA Syntax:
rc = mc.mcAxisSetPos(
number mInst,
number axisId,
number val);

Description:
Set the Position of an axis by changing the fixture offset.

Parameters: Parameter Description
mInst The controller instance.
axisId The axis ID for which to set the position.
val The axis position (in user units).


Returns: Return Code Description
MERROR_NOERROR No Error.
MERROR_INVALID_INSTANCE The mInst parameter was out of range.
MERROR_AXIS_NOT_FOUND The axis specified by axisId was not found.

Notes:
Set the position of the axis by changing the current Fixture offset. This is not valid for out of band axes.


Craig

Title: Re: Laser pointer, offset X-Y and set zero but whitout moving the tool incremental
Post by: joeaverage on June 05, 2023, 04:53:13 PM

Hi,
I would suggest that you instantiate two registers X_AXIS_OFFSET, and Y_AXIS_OFFSET and make them persistent.
That will allow you to populate both registers with the exact offset for each axis. It might be for instance that you intended the X axis offset to be
3 inches , but when its all bolted in place its 3.024 inch, well that's OK just put the the correct and exact number in the register.

Now you write a macro that zeros the X and Y axes combining the two registers using the API above.

Mach4 has built in macros so clearly you don't want to overwrite any of those. I make it a rule that any of my own macros are m100() or above,
and then I can be reasonably sure that none of my macros will clash with any internal macros.

Can you tell me what axis no. you have assigned the X and Y axes to?

Craig