Post processor question

Forum|Forum|8 years ago
June 28, 2018
5 replies
3968 views

I am having an issue with G83 on my post. I am trying to peck drill and the post will give me the peck on the first hole but not the following holes. Does anyone know how to fix this?

General

B

BenLoosli

23-Emerald III

The post is writing a lot of extra lines! Thank goodness for DNC and not punched tape.

I am guessing the controller is cancelling the F and Q values when it sees the G80.

Try setting those values to non-modal in the post so it outputs them on every G83 line or eliminate the G80 between the G83 lines.

KenFarley

21-Topaz II

The peck (Q) and feedrate (F) are modal, so they don't need to be output for each drill cycle. Subsequent cycles will just use the previously set values. It looks like all you really need is to have the next position, in other words something like:

G83 X1.0000 Y2.0000 Z-1.5000 Q0.0500 F10.0

X2.0000

X3.0000 Y3.0000 Z-1.2500

G80

P

pgf545

Author

1-Visitor

That's what I was thinking it was but my machine is only pecking the first hole and the rest of the holes it is doing in one shot. I was able to work around by manually adding the Q to the other lines

KenFarley

21-Topaz II

That is an odd controller behavior. I suppose you could use the Option File Generator

Applications->NC Post Processor

then

Motion->Cycles

and experiment with the "Cycle Motion Data Modal Condition" setting. I think it will put out the "full" G83 command every time if you set it to "All cycle points". You could check the .ncl file that is generated by the "Save a CL File" command and see if the peck parameter is output on every drill point. If it is, the problem is in the .FIL code that is used when you post the file and you might need to poke around in that file to ensure the peck is output on every drill command.

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