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Haas probing and macro question


Bruce Caulley
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Ahoy!

 

I am spending the next few months at a place that is all Haas (GROAN biggrin.gif ) and some of them have a renishaw probe installed. I have had a play and have no problem using it for work offsets etc, but would like to be able to do some in cycle measurement and tool diameter/length adjustments.

 

Eg, I have a bore that is 50mm +/- 0.005mm and am using a 16mm EM to interpolate it using control comp. I would like to take a pass, probe the bore, send the size to a variable, calculate the offset change necessary, if any, and then recut and re-measure until the size is in limit.

 

Does anyone have an example of how to send the probed value to a variable in a programme?

 

BTW, not using MC for this.

 

Any help appreciated.

 

Bruce

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I apologize if you already know this, but if you go to the Haascnc web site under the customer service tab there is a section for manual updates. The newest mill manual is Rev Y dated December 2009.

A search found several references on probes and how to save and use the local variables in a macro. I think this would be real handy once you get it figured out, but I doubt that an ideal Haas in an ideal environment could consistantly hold that tolerance.

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Bruce,

 

.0039" total tolerance by automation in measurement at the machine?

 

Don't get me wrong, but I think you are asking for a lot here. More than likley, if you simply re-cut with no offset in diameter, the part will become out of tolerance (spring pass). Example, say you are .0001" too small, I bet if you re-cut you will be too big.

 

In addition, for most CMM's, it's a challenge to measure .0002" total tolerance with good accuracy so I think what you are trying to do won't be very practical on the machine.

 

I would be interested in hearing about your results, please post them. It sounds like a fun experiment.

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quote:

I have a bore that is 50mm +/- 0.005mm and am using a 16mm EM to interpolate it using control comp.

Bruce I see a few issues here,

 

1 - Can the HAAS actually cut a round hole to that tolerance? Will it be round to 10um

 

2 - Where will you probe the hole? If you use the probe at +x -x +y -y then the result may not be correct as this is the 4 quadrant points of the cirle, This area will have the greatest error as it is where the servo's have to reverse direction and hold the tolerance. I would think that the hole will give a different result if measured at 45° to the x axis.

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If you only need it for a few months, Renishaw has a free 90 day demo on their CAM software for probing. It worked great with the Haas probes at my last job. I still have the custom post I set up for the Haas while I was there, although their posts are very easy to make the small edits needed. You could generate probe routines and macros to do the inspect/adjust/re-cut set up you are looking for in just minutes. Very user friendly.

 

http://www.renishaw.com/media/pdf/en/b3a74...cd9f46d9e5f.pdf

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  • 3 years later...

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