Re: 4th axis rotary with a 3 axis control, cutter comp.

Fred,

I Cut the Eccentric Follower in styrofoam last night. BUT I made a
change in the depth cuts, and forgot to turn off G41/G42 before I ran
MAXNC PRO (looked GREAT on the Sim). Yes, you're right! One needs to
understand the cutter comp BEFORE using it! Funny lump to the left of
the entry/exit point on the contour! Dust not as bad as I expected. I
made more of a mess trying to cut a chunk out of the sheet of
insulation, and trying to slice it into 1" thick slab, then milling it!
Tonight, I try again, with the comp's removed. Oh, and I found out
afterwards, the end mill I grabbed was LARGER then the 1/4" I thought I
had. Good thing it' only styrofoam!

Alan

Fred Smith wrote:

> Message: 7
> Date: Wed, 06 Sep 2000 17:42:30 -0700
> From: Alan Marconett KM6VV <KM6VV@...>
> Subject: Re: 4th axis rotary with a 3 axis control
>
> >it would appear that the cutter still cuts on both sides!
> >Isn't that something I want to avoid? Especially on a finish cut?
>
> >I think I need to initially turn off cutter comp. (until I check out
> >MAXNC PRO). Will the teardrop's still work? I deleted the G41 & G42's,
> >so I could view it with FlashCut. On to the styrofoam!
>
> Know your machine first then learn how it's cutter comp works. I agree with others that have posted advice to ease into cutter comp. Other variations not mentioned, are controllers that will and will not allow changes in Z depth while cutter comp is turned on. Most in my experience would prefer that cutter comp be turned off at any time that Z moves are executed.
>
> The tear drop, approach and depart, will still work well, you just have to remember to offset the finish contour by the tool radius, before adding them.
>
> Best Regards,
>
> Fred Smith IMService
>
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