Toolpath on Control compensation isn't good vs Computer compensation

[francesko]

Hello,

WHen i'm selecting Control compensation for a specific operation, the toolpath that's created is no good. 
I wan't to make  a bigger radius inside of a hole using a T Shaped tool. 

Here is the shape of the part i'm making. 

And the tool path created with Control compensation :

The parameters i use :

 

When i'm choosing computer compensation, the tool path is okay. 

Does any one know what causes this problem ? i want to make it work with control compensation so i can edit the tool wear on my machine.

 

Thank you,

 

Francesko

[Leon82]

Is the box for simulate cutter comp in control checked?

 

You can control wear with wear also

[gcode]

I would use wear.

Control comp is going to bite you

[#Rekd™]

With "Control" compensation the control on the machine offsets the amount for the tool diameter or radius, so the code coming out will be calculated at the actual dimension you are trying to cut.  Use "Wear" and you can adjust the wear values on your machine to get the correct size.

[cruzila]

I just did this on a steel manifold with a .630 deep x 1.00 wide undercut 7" deep.

I used circle mill with start and stop on center turned on because the tool was .008-,012 smaller than my pilot hole 2.490. Worked awesome.

[David Colin]

@francesko

This is probably related to your lead-in/out. Please share a file to get more help.

[JoshC]

control comp will require a lead in move that is at least 50% of the tool size. which is a CNC controller requirement not just a mastercam requirement. As others suggested , wear is your friend here

[Newbeeee™]

14 hours ago, JoshC said:

control comp will require a lead in move that is at least 50% of the tool size. which is a CNC controller requirement not just a mastercam requirement. As others suggested , wear is your friend here

Being UK we used Control 100% for finishing paths. By the time I read about wear, we had a load of new progs and Bus.Partner wasn't happy about changing as he never saw the benefit

But the lead-in-out I set to 55% default. I'm sure initially, it was 50% but on a part (or two) we got the fanuc comp alarm. 55% cured it and we never had a problem again.

[BBprecise]

On 3/25/2023 at 4:44 AM, Newbeeee™ said:

Being UK we used Control 100% for finishing paths. By the time I read about wear, we had a load of new progs and Bus.Partner wasn't happy about changing as he never saw the benefit

But the lead-in-out I set to 55% default. I'm sure initially, it was 50% but on a part (or two) we got the fanuc comp alarm. 55% cured it and we never had a problem again.

Same here. I haven't run in to a situation where I couldn't make control work in almost 28yrs. Maybe I'm just lucky.

By default my lead in/out are set to 55%. I have had times where I've had to be between 50 and 51%, but that's very rare.