Post Processor issue or user issue?

[natedogg4567]

So I recently came across a problem where my drill depth is being changed by what I think should be an unrelated setting. Maybe it is just me IDK. Under the Heights Tab there is a box called feed height. I want to transition from rapid to feed at lets say .2 above the part. So i set that Feed Height Field setting to .2 from Top of part. During maching however my hole is .2 to deep. If i set it back to 0 the hole is the correct depth.

With the Feed Height set at .2 above Top of Part, I get the following

G81 X1.2951 Y-0.75 Z-1.05 R0.2 W0.575 F13.3

With Feed Height set at 0 above Top of Part or Disabled, I get the following

G81 X1.2951 Y-0.75 Z-0.85 R0 W0.575 F13.3.

Im bothered that the Z depth is changing by .2, the R value I can understand as it is going to .2 above the part. But I dont think that the ending Z value should change based on the Feed Height location. It should still have an overall depth of X-.85 ( Top of hole is at -.75 with a .1 deep spot drill) but with me giving the tool some clearance over the part, it is going way to deep as the next operation is tapping. Am i correct that this is a post processor issue or does this look correct.

This is the newest version of the vickers.cps postprocessor.

thanks

[a.laasW8M6T]

Hi

the way the post is outputting the z depth appears to be Incremental from the feed height rather than absolute coordinates

This is quite possibly correct for the Acramatic controller but I don't have a manual to confirm.

I would check the manual for the G83 cycle to see what its says about the z depth.

[natedogg4567]

I will look and see what it says

[natedogg4567]

So according to line 2 it is absolute mode regardless of setting. But line 4 says it introduces a gauge height of .1 automatically. But my issue has to do with the R value. Any idea's ?

 

 

 

[a.laasW8M6T]

Hi

This section here seems to me to confirm that the Z is from the R plane(incremental)

So the post is correct according to the manual.

Are you getting incorrect results at the machine?

[natedogg4567]

Yes the drill and spot drill is going to deep, if i set the Feed Height to .2 and try to spot a hole .05 deep, the spot drill goes .25 deep. 

[natedogg4567]

So that means that the post is being output as incremental and the machine is using it as absolute?

[a.laasW8M6T]

I'm not 100% sure

Ive changed this post zo it just outputs straight z coords in absolute

try it very carefully just cutting air and watch the z display as its running to see if its correct.

[natedogg4567]

Ok. I will see what happens. Thank you.