Post with Absolute I and J

[Anonymous]

I have a 2D mill, (no Z) with an older Centroid controller.
It requires the I & J values to be absolute not incremental.
I can deal with manually removing all the Z code and inserting pauses for raising/lowering the Z axis.

Is there a post included with HSMXpress that provides absolute I & J values?

Is it as simple as changing this code in the .cps file?

// circular output
var iOutput = createReferenceVariable({prefix:"I", force:true}, xyzFormat);
var jOutput = createReferenceVariable({prefix:"J", force:true}, xyzFormat);
var kOutput = createReferenceVariable({prefix:"K", force:true}, xyzFormat);

What do I change it to?

Thanks for any help

[fonsecr]

The generic HURCO post uses absolute arc centers so the code has to look the same.

var iOutput = createVariable({prefix:"I", force:true}, xyzFormat);
var jOutput = createVariable({prefix:"J", force:true}, xyzFormat);
var kOutput = createVariable({prefix:"K", force:true}, xyzFormat);

In onCircular() you need to use:
iOutput.format(cx)
jOutput.format(cy)
kOutput.format(cz)

Instead of:
iOutput.format(cx - start.x, 0)
jOutput.format(cy - start.y, 0)
kOutput.format(cz - start.z, 0)

[Anonymous]

I would like to try this option (absolute) at HEIDENHAIN. We found the code to:
http://forum.hsmworks.com/index.php?topic=7.0, but the code is more than a year old.
It is thus still relevant or need to be adjusted differently?
It would be possible to add HEIDENHAIN switch, similar to fanuc incremental.cps http://forum.hsmworks.com/index.php?topic=96.0?

[fonsecr]

This forum post is not about absolute versus incremental coordinates. Maybe this needs to go in a separate post. Heidenhain doesn't use an equivalent for G90/G91.

[Anonymous · Accepted solution]

Rene, thanks so much for your help.

I got it to work by leaving the //circular output as:

var iOutput = createReferenceVariable({prefix:"I", force:true}, xyzFormat);
var jOutput = createReferenceVariable({prefix:"J", force:true}, xyzFormat);
var kOutput = createReferenceVariable({prefix:"K", force:true}, xyzFormat);

and changing the onCircular() references to:

iOutput.format(cx,0)
jOutput.format(cy,0)
kOutput.format(cz,0)

This outputs X, Y and I, J as absolute. Hooray!

While I have your attention, do you have any posts that are 2D only, (no z references)?

[fonsecr]

Not a Centroid one.

In onOpen() add:
zOutput.disable();

This will take care of most Z output. Next look for any additional "Z" references and comment them out (e.g. machine retracts).

[scottmoyse]

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@Anonymous wrote:
Rene, thanks so much for your help.

I got it to work by changing the onCircular() references to:

iOutput.format(cx,0)
jOutput.format(cy,0)
kOutput.format(cz,0)

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Legend! Thanks. I was staring at those values wondering if that was the difference between incremental and absolute, but not really understanding the math. This is spot on. Cheers.