13 replies to this topic

[Oppiz]

What can I do to make sure that cutter comp. never starts or end on an arc move?

[DavidSV]

We have a flag in out post that if a cutter comp move is posted with an arc move that it pops up a warning and flags the NC file where its at so we can go back and change it.

[gcode]

the mpmaster post available for free from this website will yell at you if you have

cutter comp turning on during an arc move

[K2csq7]

[attachment=3027:cflg.JPG]

You can use those to make a conditional statement,
if (comp on point or comp of point) and (sgcode$ = 2 | sgcode$ = 3)
pbld, "COMP ON OR OFF DURING ARC MOVE"
exitpost$


BTW, screenshot is from X5 nci & param ref guide.

[FNMI]

Use a short entry/exit line on the lead in/lead out, If you are on a circle, just start the tool from the center. and set the lead in /lead out value to zero.

[JParis]

I know this sounds blaise' not the tone I mean but in the end, just pay attention, it's not hard to notice or control

[Del.]

FNMI, on 27 July 2012 - 12:51 PM, said:

Use a short entry/exit line on the lead in/lead out, If you are on a circle, just start the tool from the center. and set the lead in /lead out value to zero.

That's what I do for the wire edm. Line lead in and out only with start position set to thread position in control def.

[Oppiz]

JParis, on 27 July 2012 - 01:06 PM, said:

I know this sounds blaise' not the tone I mean but in the end, just pay attention, it's not hard to notice or control

I know, but every now and then, a program will make it to the machine only to get and error. I was on vacation and the person filling in for me had an issue with it.

[Matthew Hajicek™ -Midland Tech]

Test for it in the post then.  You can have it warn and continue, and then you look for the warning text in the g-code to see which is the offending operation.

[kunfuzed]

Why is this even allowed to happen?  Is there ANY control out there that actually allows this? Just curious...  

[JParis]

Quote

Is there ANY control out there that actually allows this?

Yes there are

[kunfuzed]

Bugger...

[DavidB@Sandvik]

As others have said put a "WARNING" in the post when G41/G42 activated on G3/G3 its easy even I did it.

Or use the IHS post

scompwarn   : "WARNING - CUTTER COMP APPLIED ON ARC MOVE"

John what controller can do cutter comp on an arc??

[JeffreyS]

I have found that turning off lead in / rad in on any profile will issue a G41 or G42 on an arc if starting from the center or a position off of the profile. I use this op only for deburring operations, where its starting on the profile, otherwise, I always use a minimal 0.01 for both parameters and this avoids the issues of radial cutter comp.