Cutter Comp Question-Mpmaster Post

[Rob @ Target Machine]

Does anyone have a trick to make cutter comp stay on until tool retracts? I don't want my post outputting g41-g40-g41-g40 over and over for the same tool.

[Allan]

G00 and G41/G42 does not play nice, I really don't think you want this functionality.

 

Allan

[DavidB]

The Mpmaster rocks for cutter comp, it even warns you when it's been turned on on an arc line.

My advice just leave it.

 

Whats wrong with it turning on and off anyway?

[Rob @ Target Machine]

I was looking for cleaner code. I leave comp set to computer in mcam and insert it manually at first lead-in move and turn it off before I send the tool home for tool change. I've only been bitten by this technique in pocketing.

 

I've always let mcam comp on/off normally, but this shop wants this code even though I,ve warned about reposition loops gouging hours worth of work.

 

Should I hold my position that mcam comps the way it does for good reasons?

[gcode]

quote:

---

Should I hold my position that mcam comps the way it does for good reasons

---

I would.. rapiding around town with cutter comp on

is asking for heartbreak..

If they instist I would put a disclaimer at the head of every program.. you WILL get bit..

[Superman]

Cutter comp is a real bitch at the best of times, but if you were to leave it on between operations then the rapid to points would not be correct

You would have gouges and comp. errors at every operation ( even more if using multi-passing and/or depths ), a big problem in tight spaces

 

As the others have said,

- rapid to point ( this point would alter if comp is on )

- descend

- comp on ( usually using lead-in line )

- contour

- comp off ( usually end of lead-out line)

- retract

 

using 'conrol' ( comp = tool radius) or 'wear' ( comp = zero ) method - what you get on screen is close to reality ( uses G40/G41/G42 )

using computer method - is real ( t/path is not adjustable in machine ) ( no Gcode comps output )

 

Yes, hold your position let Mastercam output safe code

If they want it their way ( manually edit and physically prove out the program )

Just a note, if you let mastercam run their way, who would get the blame for the gouges ( Mastercam? )

 

To run their way, use 'computer' and let them add the codes

[CNCme]

Good day,

 

Have you tried "enter/exit on first/last depth cut only" in lead in/out

 

It gives you only one G41/G40 per operation

 

Tony G

CNCme Engineering

X Beta Site

SO Almost Employed Senior Programmer

N.E Massachusetts - Southern New Hampshire

_________________________________________

End mills and tooling are like The "AMMO"

And coolant and chips are like the enemy

Under your boots as you advance in the

Manufacturing Battle

-------------------------------------------------

[Rob @ Target Machine]

I will "push the issue" and stand my ground. Inever had issue with the way mcam handled comp until this company brought this up. Maybe they don't want to admit that their method is wrong.

 

I will look at:

 

"Have you tried "enter/exit on first/last depth cut only" in lead in/out

 

It gives you only one G41/G40 per operation

"

 

At least if I can minimize the comp on/off and show that it is a safer method than theirs I can offer a comprimize and no-one has to admit to using "bad practices".

[Rob @ Target Machine]

I will go back to "wear" comp as I have used for years, and proceed to fight the "higher ups" on this issue.

[CNCme]

Good day,

 

Keeping the CC on in between operations is not recommended.

specially if work shift Z zeros have large diffs

(values)

 

Tony G

CNCme Engineering

X Beta Site

SO Almost Employed Senior Programmer

N.E Massachusetts - Southern New Hampshire

_________________________________________

End mills and tooling are like The "AMMO"

And coolant and chips are like the enemy

Under your boots as you advance in the

Manufacturing Battle

-------------------------------------------------

[Rob @ Target Machine]

Thanks - "enter on first /exit on last" option has won approval with the boss.

[CNCme]

Good day,

 

I believe using this method, no matter how many multi or depth passes, there is only 1 enter and 1 exit. So you have to be careful because, there is more plunging going on.

 

Tony G

CNCme Engineering

X Beta Site

SO Almost Employed Senior Programmer

N.E Massachusetts - Southern New Hampshire

_________________________________________

End mills and tooling are like The "AMMO"

And coolant and chips are like the enemy

Under your boots as you advance in the

Manufacturing Battle

-------------------------------------------------

[Rob @ Target Machine]

Thanx its just what I was looking for, and working fine - without so many needless g41/g40's in my programs. It makes proofreading so much easier when things are less cluttered.