Machsupport Forum
Third party software and hardware support forums. => Newfangled Mill Wizard => Topic started by: AllenJ on February 20, 2014, 01:03:54 PM
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Hello all,
I've tried cutting a 1/2" rectangular pocket with a 1/4" end mill and I get a notice about width must be twice the size of tool diameter. Why is that and is there any way around it in Mill Wizard?
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No, it is that way by design. You cannot cut a clean pocket if the tool is exactly twice the pocket, At least not with the toolpath I use.
Either ask for a .501 pocket, or tell it the mill is .249
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Is it just me ? or, does something look funny here ?
Half inch pocket ... with a quarter inch cutter ? ? seems like that should work just fine.
"You cannot cut a clean pocket if the tool is exactly twice the pocket" This part makes sense though. (quite difficult to do though).
Not sure,
Russ
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Actually the issue is the circular ramp in which we set to be a ramp of radius equal to tool diameter. I am not really sure how we arrived at that number, but Brian picked it and it works cleanly. I suppose the code could check to see if a plunge cut is requested then allow the smaaller pocket.
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Hi Ron,
In this case, maybe switch to a zig-zag plunge, then straight to cutting with a small (cutter * .25) horizontal lead-in ..
Thanks,
Russ
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Thanks for the input guys. I tried changing the dimensions slightly, but it did not work. Even went to .600 and did not work. I am using a 15 deg. ramp in. I will try a straight plunge when I get a chance and get back to you. I might add that you guys are the greatest with taking your time to help us newbies.
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Rev 1.0.11 works fine here.
What ver. are you using ?
Care to post your .job file ? Maybe you are not entering something correctly ?
Just a hunch,
Russ
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The real issue here is that inside corners smaller than the tool are likely to chatter badly in the corner as the tool suddenly increases. So I always try to design using a radius about 0.010" larger than a standard tool so the clean up pass sweeps smoothly through the corner. When I had to deal with on size radii I used to head to the tool room for an under size regrind. They were always sharp because no one else wanted to use them, and the tool guy really liked that I preferred them.
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The real issue here is that inside corners smaller than the tool ...........................
What exactly are you talking about ? Do you mead a .25" cutter creating a .125" radiussed corner ? If so, I get that.
A .25" cutter in a .5" wide slot is the same as a .25" cutter in a 5 mile wide slot. :)
Thanks Gary,
Russ :)
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Russ,
Go get a 0.240 regrind and a put radii on your toolpath! No chatter marks no programming problem.
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No problem here with .250, chatter or programming .... but I see what you are meaning.
Russ
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O.K. guys, I checked, my version is 1.0.13. It seems my radius request of .250 was causing the width problem. The .250 radius is what I need so as to have perfectly rounded ends to the rectangular pocket not squared (inside pocket). So I tried a .125 cutter and asked for a .250 radius and same problem. I really don't like straight down plunging. I'm open for suggestions.
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See if the Keyway slot does a better job for you. It does have fully rounded ends, and it will do a .500 wide with a .250 tool. It uses a ramp in start on a straight line down the center of the slot.