Please help with tool comp

[CNCMAD2008]

Hi all I am new here so please go easy on me .

I have a problem with any part I do in inventor to mastercam basically I have created this part in inventor





and I save it as an inventor part and open it in mastercam now if I manually chain these lines I get no tool comp on the ending edges no matter what I try/do I cant get it to work.



If i use the auto chain tool or C plane it sees it as one continues line therefore gives me the tool comp I require.

But I cant all ways use this option and want to figure out how to get the tool comp by selecting individual lines manually (please note this is a test part as an example).

Please help

[CNCMAD2008]

Hi again I am still trying to figure this out.

I may have not been clear above so I will try again.

I have two lines joined but say I only want to machine along one line I will choose sinlge line from the chaining window and select the one line.

I will then choose tool etc and as you can see it will take tool into consideration along the line but when it gets to the end line it ignores it and will there for pass into it as you can see



Is there any way to get it to see the other line and use tool comp on that to?

other examples if I choose the two lines using the single line command the tool pathes overlap at the ends



Thanks

[carbidecraters]

Check your parameters for the right cutter comp. You may have it set on the ball style comp hot (tip) flat comp. Also confrm your diameter in the tool library using your filter and that your actually using cutter comp.

[CNCMAD2008]

Hi there and thanks for the reply.

I have checked all my settings and they seem to be good.
I am using a flat end mill and comp is set correct but I still get tool overlapping on the line I don't want to machine



I suppose choosing the one line it will go to the end of that line I just cant figure out a way to get it to take tool diameter into account even at the end of the line as per pic above.

Thanks

[carbidecraters]

Oh I believe there is a "Keep sharp corners" tab that does that.

[CNCMAD2008]

Yeah I have it set to that (Roll cutter around corners) and tried other settings to in that panel but no luck.

I have only selected one line from the chain panel to machine along the other line I have not touched therefore when it is cutting along the sinlge line I did chain when it gets to the end line it ignores it but there must be a way to get the tool to stop and take tool comp into account at the start/end of a line?.

[carbidecraters]

It most likely is you probly just dont have much comp set. Why dont you tangent line the comp 1" so you can visualize it? You may also have no retract set because it looks like it is the same color as a feed line.

[CNCMAD2008]

I do appreciate the help please bare with me hahaha if I set it to 90 degrees the opposing line that is then its more clear what I need.



As you can see it passes over the line that I have not chained but I want it to stop before and take the tool comp into consideration before it does go over the line.

Thanks again

[WallyL7]

Easiest way to do that - given the cam system thinks you want to machine the entire line - is to go into your "LEAD IN/LEAD OUT" parameters and click the "ADJUST START OF CONTOUR" section and just select the "shorten" tab and put in half the endmill or something similar so it will stop that much before the end of the line.

There are entry adjustments and exit adjustments so just make sure to adjust the one you need.



---this has nothing to do with comp, since as you can see it is comping half the endmill in your toolpath for the line that you did select. It has to do with you not selecting the second line, so it doesn't take it into consideration at all. It ignores it completely.

[CNCMAD2008]

Hi there and thanks for the reply.

I have set it as per suggested I think



and it does not show the changes in the back plot screen should it or will it just do so when machining? or have I actually missed something.

I am using a 0.500" end mill and as you can see set it to 0.250 half the tool but it don't back plot showing this.

cheers

[WallyL7]

Set the length for .25 - (second box )

You have the percent set to .25 - which is actually the .00125"

[CNCMAD2008]

That`s got it thank you so much for the help every one



Appreciated thanks you.